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H: Radioshack 555 Timers
So I went to RadioShack recently because they were having a 40-80% off liquidation/closing sale. I picked up quite a few things, and one was a 555 timer for a decent discount from its already low price. Now, I'm about to make an online purchase and I don't know which one it was. It was eith... |
H: Transformer vs Inductor for lighting a bulb or any other appliance
There was a question in my school physics exam which is as follows:
Consider a 100W bulb which operates at 50V dc. John wants to light this bulb by a 200V ac source. What component should he use, also give its specifications.
The answer to the que... |
H: Common Emitter Amplifier Problem (Incredibly lower Gain than input, and Distorted)
I'm trying to create a common emitter amplifier to power a medium sized 8 ohm speaker as a learning experience using one NPN transistor specifically the PN2222A.
Here's the design schematic in LTspice.
The arrow pointing to the 8 oh... |
H: Finding Poles of an RC Op-Amp Circuit
I am not sure how to get started with this practice question:
I think to find the poles I need the transfer function, but I'm not sure how to analyse this circuit. Any help would be greatly appreciated.
AI: Your assumption is correct - for identifying the poles you need the tr... |
H: How to select series resistor for a Zener Diode
I have to simulate the reverse bias curve in Multi Sim with a 1N4681
I understood the equation to work out the series resistor to be:
$$R_s = \frac{V_S-V_Z}{I_Z}$$
Which in my case would create a 101 Ohm resistor.
However, this doesn't seem to be creating the characte... |
H: Right motor for a camera gimbal and what kind of a gimbal motor is this?
From information on the Internet I understood several things:
Low KV motors are better for gimbals. For lower KV thinner wire is used with more turns.
Outrunner motors have more torque than inrunners.
More poles give smooter rotation and fine... |
H: Use Teensy 3.2 in breadboard without soldering
I bought a Teensy 3.2 board, and the package included some headers:
I want to use the Teensy in a breadboard, and so I plugged in the headers and put the entire thing in my breadboard:
The little holes in the Teensy and the header pins don't make a good connection, s... |
H: Thermal relief for thick PCB traces
A PCB trace that carries considerable current (~5 Amps) needs to be wide, on the order of 4 mm. I am concerned that this wide and thick (70 mil) trace may cause problems during hand soldering, but cannot figure out a way to make thermal relief for the pads in Kicad. It is easy fo... |
H: Setting maximum opamp input voltage by zener diodes with respect to supply voltage
When I was about to implement a circuit with a 24V supply voltage I noticed that the comparator's inverting input in the part below receiving 24V with respect to ground when the input signal goes high. I was investigating hysteresis ... |
H: Is setting software flags an effective use of interrupts?
I'm currently working on a microcontroller(Arduino) project in which I wish to use interrupts generated by pushbuttons and timers. However, I'm not sure if I'm 'effectively' using the interrupts. Here is my following architecture approach:
Let's say I have t... |
H: How to add bouncing to a switch in LTspice?
Is it possible to add bouncing for a switch in LTspice?
Below is a reed relay simulated in LTspice.
I can set the on and off resistances but is there a workaround to create bouncing as well?
With no bouncing, the simulation of the relay outputs the following clean output... |
H: Design a PCB using Kapton film
I am a novice in electronics and wanted to design PCB , as a final year project i am planning to do something related to room heaters so i have decided to use Kapto/polymide material for that.
I am planning to build a PCB like mentioned in this link
Kapton 12v (4" x 2")
Can anyone gui... |
H: Verilog Can't resolve multiple constant drivers for net
I've searched for this on google but the answers are not clear to me. Act like I am very stupid please, as I am a freshmen ECE major. My lab wants to me to use Verilog to program a DE0 to display the numbers 0-9 on its displays depending on what switches we fl... |
H: What kind of circuit is required to increase amperage with variable input voltage?
I am new here and will try to be as specific as possible.
I started doing all kinds of stuff in my car, and wanted to add some led stripes in the interior. I want however that the led stripes are dimming with the rest of the interior... |
H: How does this latch relay work?
What is the function of the two diodes and the resistor? Why does not the SET coil have resistor?
AI: The diagram shown is for an AC-coil (or AC-DC) latching relay. The series diodes are there to rectify the AC. They're typically rated at something like 1kV PIV.
The resistor is fo... |
H: Wiring Motor to DPDT Polarity Switch
I am trying to wire my motor (US Motors, Model: C55JXKNL-5041) to a polarity reverse switch. The diagram printed on the motor is as follows:
BLU ____L1
BRN ____INS
BLK ____INS
ORG _^
WHT _^
YEL ____L2
RED _^
There is also a note printed on the motor saying "To reverse rotation i... |
H: Using an optical switch with 5 terminals as a sensor
I am currently working on using a slottet optical switch like this OPB4xx one as a sensor for my project. The sensor going to send its output to my Arduino which then will process the data. According the to the data sheet it has 4 input wires and 1 output wire.
... |
H: Differences in the rs232 series
Another question on chips. I want to program my esp8266 chip, and I need to know what to use. I've ordered a rs232rl 3.3/5v selectable board, but I want to know if this will work with an arduino, picaxe, or any similar thing. What's the difference between the rs232, the rs232r, an... |
H: Can I use the center tapped transformer as a non-center tapped transformer?
I am building a single DC power supply from scratch. I use the transformer to step down the 120 volts wall line. I want to use a non center tapped transformer. I found a center tapped transformer (one that has 3 connectors on the secondary ... |
H: Is it viable to power a circuit board featuring an SD card using a coin cell battery?
I'm currently working on an electronics project implementing an SD card. It is also required that this device be portable and small, thus I'm attempting to use a coin cell to power the board.
However, I'm finding out that this is... |
H: What makes a led blow up?
If I connect a LED to a 1.5V battery without a resistor and it blows up, is that because of the voltage or the amperage? I think amperage, but I'm a beginner at this.
AI: It's because of the power.
Power can be calculated by \$ P = VI \$ (volts x amps) and the answer is in watts.
The pow... |
H: Driving dots (periods) next to digits on Terasic DE1
I have a Terasic DE1, and have imported the maker's pinout file, which contains pin assignments for HEX digits. However, I noticed that each HEX digit has a dot next to it and I cannot find any pin assignments for those dots. I'm wondering if they are disabled or... |
H: simple circuit review
I'm building a DIY project with a Rapberry Pi.
I tried to cut down the connections to the ones I think might be involved in a certain behavior I'd like to understand.
What I have:
a 12V power supply
a UBEC that is powering the RPi
a small DIY board with connection for some sensors, an LCD and... |
H: getting infinite output impedance in Ltspice but not by manual analysis
I am a beginner to LTSpice, I make this simple netlist:
*#destroy all
*#run
*#print all
.TF I(vmeas) vin
vin vin 0 DC 1
R1 vin vout 1k
R2 vout vmeas 2k
vmeas vmeas 0 DC 0
.end
I am using a test voltage source( 0 volts source) to calculate curr... |
H: Can RFI be radiated by connector wire even if shunted at opening?
Imagine a metal enclosure with an XLR connector. My understanding is that it is vitally important for pin 1 of the XLR (the shield) to be connected to the chassis with a very short conductor to make the shield (and connector shell) part of the chassi... |
H: Chinese power supply schematics/components
I have a chinese power supply which i brought from a garage sale which has some problems. I opened the case and I concluded that some resistors and capacitors are burned. I would like to repair this power supply to use it for small electronic projects at home (60W, 12V, 5A... |
H: Question about combined ac/DC signals
Would anyone care to provide a simple explanation about the interaction between an audio signal and a DC bias current in regards to voltage/current calculations? For instance, an audio signal with 1v peak to peak interacts with a transistor base voltage divider at 3v. I am new ... |
H: Why use a Zener in a regulator as opposed to a regular diode?
If you had a regular diode with a turn-on voltage of 5V (hypothetically), and a Zener diode with a reverse-bias of 5V, would the Zener diode still be preferred in a voltage regulator?
I'm trying to understand why a Zener diode would be used instead of a ... |
H: Repluggable connectors of Project ARA
Looking at various ARA prototype pictures I noticed they all seem to feature pluggable connectors.
Sadly I could not find out which ones.
Can anyone make heads or tails of this picture?
AI: Those are SMA connectors, perhaps the most common 50 ohm coaxial rf connector these days... |
H: What happens when I suddenly stop the axis of an electric motor?
Suppose I have a simple circuit with a 9V battery that is connected to a DC motor, causing it to spin. Then I suddenly squeeze the motor shaft between my thumb and fore fingers, and bring it to a sudden stop.
How can understand what happens to cir... |
H: Half-wave rectifier with diode connected nMOS and pMOS
I am reading about half-wave rectifier and there are two questions below. Hope anyone could help me out.
Q1: the text said that the diode-connected PMOS body is tied to source. However, in the figure, body is tied to the drain.
Is this a mistake?
Q2: Why conne... |
H: Should I buy a power supply for the input or nominal voltage of a DC device?
I'm looking to purchase a power supply/wall-wart for a small pump. The pump is listed to operate at 12VDC input upto 3A. I'd like a 12VDC/4A power supply so that I may power a second low-current device (mA order) from the supply, but the... |
H: Current through heating element lower than resistance suggests
The fuser lamp (the heating element) in my laser printer broke from one of the ends. I measured the resistance of the, almost full length, wire which was 6 ohms. I tried to fix it by connecting the wire to the printer but the wire kept breaking after a ... |
H: How to slow down an 12V electromotor/fan
I just bought a cheapo fan like this on Ebay, and it's intended to be used in a costume for Halloween:
http://www.ebay.com/itm/Computer-VGA-Video-Card-Heatsink-Cooler-Cooling-Transparent-Fan-40mm-12V-2pin-x-/181701435335?hash=item2a4e3fdfc7:g:mqQAAOSwPYZU-H39
1) It's 12V, wh... |
H: Question about power drawn from a current limited supply when it is short circuited
Consider the schematic below:
When the switch is open, the 10 ohm resistor will draw 0.5 amps of current and dissipate 2.5 watts of power. No issue there.
When the switch closes:
We know the power supply output current is limited ... |
H: What kind of jumper wires are used with a breadboard?
What kind of jumper wires should I get for electronics and a breadboard? There are female to female, male to female, female to female with headers. I don't know what to get. Just hookup wire?
AI: From my experience, you should get all three types. Most of the... |
H: Do a diode and a resistor in parallel have the same voltage across them?
Example attached. My intuition is telling me that they're the same because of Kirchhoff's laws.
I know that a constant voltage model exists but I was worried about the nonlinearity of the diode disqualifying basic KVL.
simulate this circuit –... |
H: Speed up charging
Is there a way to create changing magnetic field that goes from positive to zero and then back to positive, regarding a sinusoidal wave.
The purpose of this is to induce a coil of wire to move in only one direction. Such as, when charging you phone, you want to speed up the current. All you do ... |
H: Can a 9v battery or AA batteries be used instead of a bench power supply?
Do I have to get a bench power supply to work on electronics on a breadboard? I know I can power an LED from a Raspberry Pi, but once you get more stuff on the board you need external power. I don't want to spend money on a power supply yet... |
H: How do I find the UTP and LTP of an Oscillator?
I am trying to figure out how to find the UTP (upper trigger point) and LTP (lower trigger point) in this circuit:
This is an ideal op-amp being used as an oscillator.
My understanding of trigger points is that they occur when e+ = e- (the op-amp inputs are equal). H... |
H: USB OTG port in slave mode, possible to use USB-A ports in host mode simultaneously?
I have been researching USB OTG for a little while and was not able to find an answer to my question. I'm seeking for the conditions, if it's even possible, under which I can have one USB OTG port work in slave mode and at least on... |
H: Will Open Collector Output of 0~12V damage 0~5V input DAQ?
In my lab configuration, I am using open-collector with 2K Ohm pull-up resistor to 12V.
The data aquisition card I am using is from national instrument.
If I look at the Low and High voltage of open collector output when not connected to input of DAQ, i get... |
H: How is IEEE 802.11(Wifi) made robust to interference?
I was curious to know how wifi is made robust to interference.How there is almost no interference between wifi signals from two nearby routers?
AI: It depends what you mean by interference.
If you mean data passing through router A 'appears' on router B's client... |
H: Converting sub-microsecond opto-isolated 3nC charge pulse into a 250us low-impedance square pulse
I have a problem with short current-pulse widths through the diode of an opto-isolator -- with widths less than \$1\:\mu\$s. The charge in each pulse is approximately 3 nC. The current height of the pulse is adjustable... |
H: Confusion in +v -v and ground in amplifier circuit
I have an amplifier kit, in which it requires a power supply with +24v -24v and ground, the input is and audio jack which is +v and ground , i.e. both of these grounds are connected, i would be using a laptop charger to test the circuit as it needs minimum 19v but ... |
H: How to use Slave Select on SPI Transceiver
I'm an absolute idiot when it comes to wireless technologies, but I'm kinda familiar with protocols over cables. Because of that, I know about the SS on SPI busses and that there is a separate cable for every signle device.
When it comes to Wireless, is there a address ins... |
H: Using DC voltage instead of AC to supply SMPS
Situation:
You have a battery pack with voltage of 300V. You have some appliances designed for 250V AC. These appliances have SMPS inside.
Claim:
Instead of using DC to AC inverter, you can use DC voltage to supply SMPS inside your devices.
Reasoning:
250V AC has peak v... |
H: How to discern earth from neutral?
I have a three cable circuit in the kitchen1, I know that one is live, one neutral and one is ground. However, there is no colour2 matching between the standard and the real cables, so I can't use the usual easy way, furthermore, from my brief research on the topic I've found that... |
H: Some questions regarding the resistors and capacitors around an opamp
I have been dealing with the following part of a circuit for a while:
But for the sake of curiosity I have some more questions left not specifically about this particular circuit but for all similar ones. I couldn't find satisfactory information... |
H: Use of umbilicals with Vacuum Circuit Breakers
I am a trainee systems engineer and have been tasked with drawing up symbols for mimics for a SCADA system. One of the symbols I have been asked to draw up is for a vacuum circuit breaker. When it is isolated an umbilical cable is supposed to be attached. I tried readi... |
H: Incomplete Astable 555 Circuit Triggering
I am using a DSO138 oscilloscope for learning electronics. It is not much, but it is very helpful for me at present.
I was setting up a 555 astable circuit. I noticed that it was triggering even though the circuit was not complete. I have included a picture of the circuit a... |
H: USB male android to audio output
I was curious if I could possibly strip the end of a USB cable, and direct audio traffic from the phone through the USB to a 5volt in p/n speaker, sub, or a tweeter. I haven't seen this done anywhere else online and I'm just curious if I could direct the audio out of the USB female ... |
H: How does a computer deal with subtraction of 2 values that are in two's complement?
I'm confused how the computer calculates if there are two values A and B, both are in two's complement. Now we want do the operation D=A-B. How is this done?
Let's say A=0100110 and B=0000111
What we do now?
I would do: 0100110+0000... |
H: What does a reverse phase dimmer circuit look like?
I'm familiar with simple forward phase dimming using a triac. The circuit is stupid easy with only a handful of components.
Of course this simple example can be improved upon to make it safer or improve performance and efficiency. But the basic principles remain ... |
H: Proper way of connecting a molex connector to a breadboard
So I'm trying to mount a keypad that requires a molex connector to a breadboard. The datasheet says it mates with Molex 2695 series or equivalent. So I thought I could just get away with a 10 position female mating connector, which one end would go to the k... |
H: How can I drag-select components in a room in Altium?
I have a PcbDoc in Altium Designer with several components in a room. I want to select some components by dragging a box around them.
I can select them if I start dragging in the gray or black areas. But if I start in the red room, I reposition the whole room.
... |
H: Can a 24.0VDC/3.0A Power Supply be used with a breadboard?
I came across a DZ075 power supply. It says it is +24.0V/3.0A. Can that be used with a breadboard? Or do I have to get it to 3.3V or 5V before I plug into the breadboard. In other words, can it be plugged into the board then make it 5volts or before?
... |
H: Repairing 'burnt' solder points
I recently came across a pcb.
This is the picture of the aforementioned PCB.
As you can see, some solder points seem burnt. The copper trace has been removed.
Does this mean the PCB is dead? If I solder the component on the solder points, will it work?
Maybe I should do prework, lik... |
H: Using single LED as bipolar DC detector
It would be very handy for me to have an XLR plug with an LED on the end to check for DC at the output of balanced audio gear. The challenge is two fold. First is that this gear can fail with a positive or a negative voltage on it's output pins 2 and 3 in reference to pin 1. ... |
H: Why does the race hazard theorem work?
So for those who don't know, the race hazard theorem (RHT) states that:
A x B + A' x C = A x B + A' x C + B x C
I understand the other part of the RHT, about time delays and such, but I don't understand why the logic statement above should be true, can someone help me underst... |
H: How to perform correct MCU interface analysis based on VIH,VIL,IIH,IIL?
So I had interfaced a microcontroller (TI CC3200) with a keypad, using a 5V power supply with maximum current rated at 225mA.
Everything worked fine, until I replaced the 5V power supply with a new one that has a bigger maximum current rating... |
H: Circuit schematic in Eagle seems to connected in series in board layout
I am very new to Eagle. I was drawing a schematic that would connect my AVR Dragon to my Atmega32A. I drew this up and switched to board layout.
The problem is in board layout. It seems to me that VCC is connected in series from the square pad... |
H: epoxy for keying box headers?
Edit: after a lot of trial and error I discovered that JB Weld works amazingly well for this. You want the original two-part epoxy
that comes in two completely separate tubes (not the newer stuff that
comes in a single double-plunger tube) since it has a ~4 hour set
time. If y... |
H: Is it OK that I accidentally swapped TX and RX on a UART bus?
I accidentally swapped the TX and RX pins on a UART bus when hooking up a to a 3.3V bus with this 3.3V cable: https://www.sparkfun.com/products/12977.
Did I cause any permanent damage to this board as I debug it?
Can we all agree to use TXO, RXI?
AI: It'... |
H: What happens to resistor when it "breaks" due to over-current or over voltage?
What happens to resistor when it "breaks" due to over-voltage or over-current?
Does it short or Open? or it merely ends up outside of specification?
AI: Anything can happen, but most seem to go open circuit. You can buy 'fusible resistor... |
H: About capacitor
If i have 20uF capacitor with charging 3V .
Now i m gonna attach 1 ohm resistor and 2 V led in series with capacitor .
Now current will flow through the led is 1Amp max For a while , but if 1 Amp current will flow through the led it must be burn out theoretically so why it will not burn out practic... |
H: Why can't I connect a std_logic_vector signal to a port of type signed or unsigned
The numeric_std.vhdl says this:
type UNSIGNED is array (NATURAL range <>) of STD_LOGIC;
type SIGNED is array (NATURAL range <>) of STD_LOGIC;
Does this means that the unsigned and signed have std_logic as their subtypes?
Why the... |
H: Amplify sinusoïdal signal with op-amp with V- = 0V
I have a small sinusoidal signal, with an amplitude of 10 mV (the signal goes from -5mV to 5mV) that I'd like to amplify.
I'd like to use an op amp, but my problem is that I only have +3V and GND voltages to supply the op amp. Which means the classical amplifying c... |
H: Steps for testing external flash memory
I have a blackfin 533 and I connect it with external flash memory.
I have a software driver that erases a block, fills data, write to flash memory.
I'm using the following chip ST M29W800D.
How would I test and verify the flash that's working ?
Should I earse it, fill it w... |
H: Distance problems with I2C connection for multiple devices
I'm considering using the I2C bus protocol to connect up to 100 devices (worst case scenario) to a motherboard to avoid using serial-port connection with each one.
The problems I face are:
I need them to be at a distance as far as 3-5 m
The maximum voltage... |
H: Installation of an AC Drive on a Mixer - Help
We have a 30hp 1440rpm AC motor installed on a mixer.
Motor Pulley: 6"
Machine Pulley: 20"
According to my calculations, the mixer runs at 432rpm.
Operating Procedure:
The mixer is loaded with approximately 200kg of raw material feed, along with water and several mixi... |
H: How hot can a lithium ion battery safely get while charging?
How hot can a lithium ion battery safely get while charging? I've found some references to 113F, but I know a lot of batteries used in cell phones get a lot hotter than 113F. I measured 140F on my Galaxy S4 while it was charging up from a fully discharg... |
H: Rounding a Square Wave
I am using a 555 IC to produce a sound in a small 8 ohm speaker. It works just fine, but the square wave sounds rather harsh. I am wondering if there is a simple way to round out the corners to make it sound better. All the circuits I have found online are rather complex. It seems to me that ... |
H: Circuit analysis with two loops, resistors, and independent/dependent sources
I am working on this sample circuit problem, which knowledge of KCL, KVL, and how resistors in series or parallel add up in terms of resistance. However, in this circuit there is a voltage controlled current source that supplies 29 times ... |
H: LMR16030 voltage regulator pin configuration
I just bought a HSOIC-8 LMR16030 and have tried to plugged it in my circuit but didn't manage to make it work. I'm thinking this might be due to me misunderstanding the pin configuration. What are the pin numbers in this picture?
Updated: Zoomed image (2x original dimen... |
H: How to increase the lifespan of an Arduino.
I have made a device with arduino MEGA with 50+ one wire sensors, 4-6 shift registers, SIM800l module, ethernet module, wifi module, RTC, SD card module, OLED, buttons, thermal printer, LM2596 buck converter etc.. All modules are soldered on my new board powered with ext... |
H: Can the 0V reference output of a switching power supply be connected to the neutral conductor?
Like the title says, I would like to know if it is possible to connect the 0V reference output of any switching power supply to the neutral conductor. Here is an image of what the connection should look like:
What would ... |
H: How to calculate the gain of the op amp in this circuit?
This op amp operates as a difference amplifier and VR2 is for feedback, But I can't figure out how to calculate the gain of this circuit, Any ideas?
AI: This isn't an amplifier but a Schmitt trigger, because the feedback resistor VR2 is between the output an... |
H: Adding Controlled Noise to Signal
I want to add noise to some signal. I have the option to add the noise via the software API of the system. But I also have the option to add the noise in the hardware circuit itself so there is no need to manipulate the software layer.
What would be the pros and cons of each appro... |
H: Can I shield noise inside an FPGA with a ground plane?
I am routing some external signals through an Altera FPGA and noise is coupling into the signals from something else in the FPGA. I have an idea to physically distance the signal route from the rest of the hardware and then have a ground separating the two sect... |
H: When is a common emitter amplifier a good idea?
In the datasheet for the LT1789 they have this application circuit. This TIP127 appears to be a voltage controlled by that opamp and placed in a common emitter configuration so it has an exponential dependence on it's base voltage. Why is this stable/a good idea? How... |
H: Dual power supply gives higher voltage as soon as load is connected
I have a +5V/+12V dual output power supply. They share a common ground. When no load is connected to 5V, both outputs read 5V/12V by multimeter. As soon as I connect a load (LCD) to 5V line, the multimeter still reads 5V fine, but suddenly starts r... |
H: ROM - COMBINATIONAL MEMORY?
A combinational circuit only depends on present input values.
Why ROM is considered as combinational memory?
AI: Since you cannot change the contents of a true ROM, it should be clear that the output depends only on the inputs, ie, which memory cell is selected by the address inputs, if ... |
H: Transistors Circuit Analysis
In terms of the load, what is the significance of the following circuit?
AI: Name the transistor's base resistor that goes up to the INPUT as \$R_1\$ and the base resistor going to ground as \$R_2\$ and the emitter resistor as \$R_e\$. Then assuming the INPUT allows the BJT, in which it... |
H: Nixie tube multiplexer circuit problem
I am working on a nixie tube clock design using IN8 tubes and a combination of MPSA42 and MPSA92 transistors to implement a multiplexed design of four tubes. The issue I'm running into now is that when I power the system on and drive one of the tubes' numerals, I get a slight ... |
H: Help identify this IC (voltage regulator?)
While reversing an old made in Russia power supply I had found these ICs. Here I am attach the circuit I had drawn and the components. The VCC and other power symbols are my assumptions. 16-pin SOIC is 26A14, maybe a transistor array?
AI: Producer of 26A14 is TEF in Tomili... |
H: Are asymmetrically split transformers made (not equal voltages)?
I'm building an Arduino based coffee roaster, and I'm looking to power it by mains voltage in the U.S. (~120VAC, 60Hz).
What would be ideal would be a single transformer with a total of 18-20V AC secondary with a non-center split, something more like ... |
H: How does Option ROM work?
(Excuse me if this is not the appropriate place for such question. I just moved it from StackOverflow.)
I just read the wiki article about Option ROM.
A few questions I'd like to ask:
Is Option ROM a special read-only chip on some peripheral devices?
The Option ROM contains device BIOS s... |
H: how to deal with the EMI issues in the 16X2 LCD display?
I'm designing a product with 16X2 LCD display and it shows the junk characters when i switch the 3-phase contactor ON/OFF through the relay.How to solve this issue through software or hardware redesign?
AI: You solve this with better design, of course.
Look p... |
H: What options are there for good Low DC Voltage, High Amperage Alligator Clip connections?
I have a 12V DC, 20A compressor for my offroad vehicle to inflate its tyres after driving on the beach. I also have high current jumper leads with large alligator clips at each end for starting cars with a flat battery. The co... |
H: detect optical transceiver transmit wavelength
Let's say there is a no-name SFP transceiver without a label and without DDM(allows to see manufacturer programmed wavelength data on EEPROM from network device) support. Is it technically possible to detect on what wavelength this SFP transmits? I have used JDSU light... |
H: Where can I get the specifications regarding utility pole erection such as depth, muffing etc.?
I believe that there will be a engineering body who publishes specifications of various engineering work.
Particularly, I'm looking for specifications for pole erections such as depth of the pole below ground, height at... |
H: calibration of the BNO055 - how does it occurs?
The 'internal calibration' in the Bosch IMU BNO055 (datasheet), says that the sensor will be calibrated everytime 'Power on Reset'. What does Power on Reset means?
Does it calibrates itself every time the device and the bn055 is turned on or will it need to be in spec... |
H: Plotting amplifier transfer characteristics
Attempting to plot the transfer characteristics of a simple demonstration-kit amp. I reasoned if I extend from roughly equidistant points on both in/out signal, they should meet to represent a fairly correct result. And since the out-signal is not symmetrical, there must... |
H: Are Hard Drive Motors Stepper Motors?
Can a hard drive motor been controlled by a stepper motor? Like the one shown below? Thanks!
AI: I guess you are actually asking
Can I control a hard drive spindle motor with a stepper motor driver?
And I guess that the linked image is of some cheap infrared remote contro... |
H: Analog signal amplification before ADC reading
I'm working on a system with a distance sensor. As the distance increase, the output voltage decrease. ( Fig. 2 Page 5 : http://www.farnell.com/datasheets/1657845.pdf?_ga=1.97138143.1773643066.1472611965)
Is it better to let the ADC "read" the raw voltage or should I a... |
H: Powering a ESP8226 via supplied breakout board
I have brought a couple of ESP8226s from ebay to have a go at making some fancy wi-fi controlled projects and i'm having some trouble, i cant get anything out of them!
With the chips I got breakout boards, (see pictures), i have dutifully soldered them up so i can put ... |
H: DC-DC converter PCB Layout (TPS54202H )
In the datasheet for TPS54202H as an example the manufacturer recommends this layout.
What about the white area on the picture, is it necessary to pour it with ground? Top and bottom?
Where to place the terminals for GND-IN and GND-OUT wires?
AI: It isn't necessary to pour G... |
H: Passive low-pass filtering question for a transducer output
I'm having ringing-noise from a pressure transducer analog output.
Here is the only information about the instrument:
http://www.trescal.be/pdf/PPC500_GB_SI.pdf
Let me briefly explain the device and the issue:
This device has an internal analog to digital ... |
H: Reading temperature value
I'm using that sensor http://www.analog.com/media/en/technical-documentation/data-sheets/AD7814.pdf
but after reading the datasheet, there is a table for temperature conversion. I can not understand it. Would someone please tell me how to convert the temperature from that table to float po... |
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