Datasets:
Alignment-Lab-AI
/
StackStore

Dataset card Data Studio Files
xet
 Community
1
text
stringlengths
83
79.5k
H: Are FT2232 interfaces completely independent? Reading through the FT2232 dual USB UART/FIFO datasheet, it is unclear to me if the two interfaces are completely independent. In other words, can I configure interface A as MPSSE and interface B as a UART ? The D2XX programmer's guide mentions the FT_ SetBitMode functi...
H: Using NPN transistor as switch Before I ask my question, I should say that I am very new to working with electronics and I may not quite know how to describe my problem. I am trying to use a pin on my msp430 microcontroller I have as a replacement for a pushbutton on a device. The msp430 is 3.3v and the device I am...
H: Reducing power supply ripple for GSM modem I'm powering a SM5100B GSM modem from a 5A bench supply (peak current is 2A). The required supply range is Vmin=3.3V, Vnom=3.6V, Vmax=4.2V, so I'm giving it 4V. Every so often, the module will reboot (a problem I've had with all three GSM modules I've tried: this, SIM908 a...
H: Create a simple flip flop circuit I am just taking a electronics course, and i am trying to understand how to build a flip flop circuit. I would like to build a circuit that has one push button, and one led. Each time the push button is pressed the state of the led would change on to off or off to on. I found th...
H: Radios and Power RF newbie here. Lately I've been experimenting with RF. I built some simple oscillators, managing to get a tank circuit working as well as buffering the 1 megahertz output of a tin can oscillator. Great. Then I attached a spool of wire and a listened to a nearby AM radio tuned to 1000 kilohertz. Up...
H: How to test capacitors of non working circuit board using capacitor meter? I bought broken sega megadrive 2 clone console. Something wrong with 7805 IC supply (I changed to another, but no result). But now I want test electrolitic capacitors and resistors, because I thing somewhere short/open circuit exits. I have ...
H: Confused about the input voltage in specification sheet? I am quite new to arduino .Something in the specification list makes me confused : I am confused about the following : Input Voltage(recommended)7-12V Input Voltage (limits) 6-20V Operating Voltage : 5V Is Operating Voltage is the voltage that is used to ...
H: How does a switching power supply reduce its power output? How does a switching power supply reduce its power output? For example, suppose a CPU ends some task, reducing its power consumption. What happens internal to the computer's power supply to cause it to put out less power? AI: The power supply's job is to ma...
H: Rate of Laptop Battery Charging Assuming I have a working solar panel system, all the things such as inverter, charge controller and battery are in place. The state of battery will obviously change, some times it will fully charged and sometimes it wont be fully charged depending on my usage. Now, If I try to char...
H: What is the best radio protocol for long range serial communication? I'm working on a project that would require up to near time (<=5mins) of packet base communication over Long Distances of upwards to 80 Gm. Obviously the base station would have to be scaled for this but what would be the best protocol in this use...
H: What is this inductor looking (RF) component? This PCB antenna circuitry supposedly is able to transmit on both 406MHz and 121.5 MHz. I can clearly see a micro-strip printed antenna. Facts: Dual-band 406MHz, 121.5MHz antenna My Assumptions: 1. 1/4 wave monopole dual-band antenna Questions: 1. What is that inducto...
H: Resistor question for current limiter circuit The new Samsung Gear watch won't charge from my 1amp nor 2.1amp USB charger brick ports. I'm assuming this is because its own power charger is rated at 5v .14amp? So the watch dock has some kind of protection circuit. I am VERY rusty on my electronics (been almost 30 ...
H: What's the dual of Faraday's law of induction? Faraday's law of induction tells us that if we subject a coil to a changing magnetic field, a voltage will be found across the coil. Duality suggests something similar should exist for capacitors: if they are subjected to a changing electric field, a current will be fo...
H: Programming ATMega16L over ISP interface Sorry if the question seems silly, but I really need some expert guidance. My question is as follows: What are the necessary pins to program an ATMega16 chip over ISP interface? I've bought a locally made ATMega16L target board. I intend to use a standard USBASP (Fischl desi...
H: crystal oscillators connected in parallel why there are two crystal oscillators connected in parallel in the circuit above? i am familiar with the configuration of Q2( look at the schematic) but what is the purpose of Q3? do i really need to implement it? if yes, why? the chip is CC430F5133. datasheet AI: If I dre...
H: Tool to remove traces on a stripboard? I was wondering what sort of tool works best for removing traces on a stripboard like the following: Datasheet. Product page on Mouser. Image from http://commons.wikimedia.org AI: A knife with a sharp point can cut traces. Exacto knives are commonly used for this. A rotary...
H: Updating Arduino Uno R3 ATMega16u2 firmware Regarding another big problem I have with some of my arduino's boards I start to suspect the ATMega16U2 chip to be corrupted and would like to be sure that he's working fine. So I've download Atmel Flip and I'm able to connect to the ATMega16u2 through serial with the pro...
H: Op-Amp - Sharing Non-Inverting Inputs in a two stage amplifier I've mocked up a simple circuit using a TL064A to reduce the single level of a single ended input audio source. I'm using two stages per channel, and both stages on each channel are sharing a connection to AGND. Is there anything inherently wrong with t...
H: What's the difference between SAI and I2S? I'm developing a USB audio device using an STM32F407G-DISC1 evaluation board. For the audio output I was intending to just use the I2S peripheral connected to a DAC. However the only sample code I can find uses an SAI module: What is this SAI module and how is it differ...
H: Solar charging LiPo batteries I would like to build a IoT project which needs need 5V. I have some 6V 1w solar panels which I would like to connect in parallel to charge some LiPo batteries 3.7V https://www.ebay.de/itm/6V-1W-Solar-Panel-Module-DIY-For-Light-Battery-Cell-Phone-Toys-Chargers/352161541865?hash=item51f...
H: I want to know the name of this switch It's a turn knob switch for setting the timer and push start in a Samsung microwave oven. I also want to desolder this component. How to do that? AI: It is probably a rotary encoder with a switch.
H: Will SN74HC245N transceiver support TTL RX when blocked? I'm actually designing a system with: ~10 "Master" boards that transmit data from slaves boards to a RS485 network 4 "Slave" boards per master one, connected trough a 3 pin jack (5V, GND and half-duplex TTL) Most of the time the slaves are sending data to t...
H: How to make/duplicate a NEC Infrared Transmission Protocol what i am trying to achieve to be able to duplicate/recreate the infrared signal of my remote control using my arduino. The arduino has a already a library for this, unfortunately it doesn't seem to support the board that i am going to use the arduino mkr1...
H: Correct way to control 12V relay from a Raspberry Pi I am working on a project where I need to control a couple of relays from the GPIO header on a Raspberry Pi. I tried getting a PCB with the layout like the right version in the image below, but I cannot switch the relay by setting the GPIO pin high/low. After so...
H: creating IQ data for LMS6002D SDR I have an FPGA connected to an LMS6002D SDR from Lime micro. I also have an BladeRF board which I am using to help me verify the functionality. I starting out with trying to create IQ data for BPSK modulation and I am not sure if I am understanding what format the data should be on...
H: DC Series motor and its starting I studied electromagnetics and with that understanding when I recall the Working of DC Series motor I stumbled upon an inherent negative feedback action in the DC series motor during starting as follows: Considering the DC Series Motor is started with No Load: 1) At the instant of...
H: Using GPIO to control multiple leds via transistors I'm trying to control 16 LEDS with the GPIO ports of a Raspberry Pi using transistors. All 16 can potentially be illuminated together. I'm trying to figure out if I can use approach B to save PCB space by merging the resistors, or if I must go with A (or they're b...
H: Thread-Style Operation on Microprocessor This is a general question about designing firmware for AVR microcontrollers, say, the AtMega16. I have a routine that I am running through several thousand times per second. The routine is entirely interrupt driven outside of the main loop. I can still run code in the main...
H: How should I interpret numbers 3 and 4 on the footprint schematic? I am creating a foot print for this PoE magjack and was wondering how to correctly interpret the symbols for 3 and 4 on page 5. From the schematic, these pins get wired but I am confused as to why they are not holes. Thanks AI: The schematic for the...
H: Is this fuse time-current curve wrong? I'm looking at the datasheet for the Bel 0ADKC /0ADKP fuses. In it is this: These curves don't seem correct. Notice that the curves for fuses with >= 800mA asymptotically approaches a value that doesn't match their rated current. Is there some assumption I am unaware of? Or ...
H: Verilog 'if' statement error Why are LEDs on after executing this? LEDs on pattern is 1010: module test(input clk, input reset, output reg[3:0] ledss ); wire[4:0] dataread; assign dataread=4'bzzzz; always @(posedge clk) begin if(dataread) begin ledss<=4'b1010; end end endmodule AI: ...
H: SOIC-8 IC input pins small spacing at high voltage I'm looking at a high common mode voltage difference amp (AD629). The input voltage between the two input pins next to each other will be 150VDC. Normally the pads should be bigger on the PCB than the actual pin size. So between these two pads is at most 0.6mm spac...
H: Op-Amp output voltage exceeds the power rail voltage (in simulation) I'm designing a RIAA pre-amplifier based on the 2 op-amps from an NE5532 package. It seems that something is wrong, because the output of the 2nd stage is giving a 400V output which is way above the power rail voltage. Is it correct? The 1st voltm...
H: How to stop current leakage in LED matrix I know that this issue has been discussed in this forum, but I am a beginner in electronics and I was unable to come up with a solution to my problem by reading the related threads. I am doing a 3x5 Led matrix (cathodes are connected row-wise): I used a raspberry Pi B+ wit...
H: Pinouts for OKX-T/5-D12N-C not on datasheet T/5-12N-C]1 12v -> 5v DC-DC converter for a project so that I can power a solenoid and a RPi with a single power source. Unfortunately, the datasheet doesn't list a pinout. There are 5 pins, and I can locate pin 1 by the square solder target. There should be Vin (12v)...
H: 12v Input LM2596 Step Down Module to USB 5.2V is Slow Charging I am trying to use this regulator module (LM2596) to regulate my car's 12V power (constant from fuse port), and use the LM2596 output set to 5.2V to charge my phone (LG G6) but get the slow charging warning (6hs xx mins to full). I presume the output Am...
H: Should I use a resistor between the gate driver and MOSFET (gate pin)? I'm making a PWM driver for a DC motor. After some questions were answered in this post, I ended up with this schematic: And I have some new questions: Do I need a resistor between the gate and the output of the gate driver (U?)? Do I need a p...
H: Using transistors to switch 12v from a 3.3v signal I'm a pretty accomplished programmer, but working directly with electricity is giving me the fits. I'm trying to replicate a design that switches a 12v/300ma solenoid based on a GPIO signal from a Raspberry Pi. The design suggests a TIP120 "darlington" transistor ...
H: RS422 and RS485; full-duplex or half-duplex? I have extensively used RS232 transceivers in many projects and have fairly good understanding of UART communication using RS232 transceivers. MAX232 and MAX3232. Now I have to build my understanding about RS422 and RS485 transceivers. So far I could not build crisp unde...
H: PCB Copper pour without making Schematic I have a problem with ground Copper pour for the PCB. I'm using EasyEDA.com to designing my PCBs. But because i usually make my PCB directly without Drawing its schematic so i can't make the ground Copper pour because there are no GND detected by the system. So i'm wonderi...
H: MUX (multiplexer): Do all people follow the convention that the upper value is let through if sel is false? Do all people follow the convention that the upper value is let through if sel is false? (assuming the multiplexor is facing to the right as shown on the image) I am asking this question because it doesn't ...
H: Fastest LCD data throughput 8080 or SPI I recently ordered a 128x128 graphic black/white display with a ST7541 chip-on-glass. It took me 2,5 days debugging and frustration to discover that they didn't wire SPI through the flatcable. A big trap for beginners, when you use the datasheet of the ST7541 chip as a refere...
H: Can lower than rated voltage be used on the non-control side of a relay? For example, if I had a normally closed relay with 120 VAC control and is rated for 28VDC on the other side, could I use 3.3VDC on the 28VDC side? AI: The control (coil) of a mechanical relay requires more-or-less the nominal voltage specified...
H: Microcontroller with different sensors I am currently working on a project which requires different sensors and modules (Gyro, load cell, lcd, wifi and ultrasonic) with MCU. But I'm not sure if I have the right connections for WI-FI module. Can you please check the connection of wifi modules? Should RX and TX be co...
H: Strategies for troubleshooting buck converter I'm trying to troubleshoot a tps65261rhbr triple synchronous buck converter from 12V producing 1.8V, 3.3V and 5V. The 3.3V and 1.8V are stable and well-functioning but the 5V is not. An oscilloscope here shows the 5V (blue) next to the 1.8V (red) for reference: The 5V ...
H: What is meant by the term "baseline noise" in this context? I came across this article about oscilloscopes. Under the figures and scope screenshots there is a term called "baseline noise". I googled but it turned out this baseline noise is used at different disciplines for different things. Does "baseline noise" ...
H: How to generate triangle shape? I tried to follow docs, and here is my implementation for triangle pulse: V1 0 1 PULSE(-0.75 0.75 0m 8.335m 8.335m 0 16.67m 0) but the result is: although the Rise time is 8.335m at appears as 0, can someone explain what’s the issue? AI: Don't ask why, but probably it NGspice fails...
H: Generic 3 phase relay switch I have a water fill level sensor which is capable to power a 3A single phase 230V motor. However, I have a three phase water pump. Is there a generic "switch" / relay which "operates" on single phase but is capable to switch three phases? AI: Yes. You are looking for a 3-phase contacto...
H: How to measure VSWR of a single connector? With a 2-port VNA, I would like to characterize the performance of a single coax connector, specifically to obtain VSWR. The specific situation is an SMA connector at the end of a short section of semi-rigid 50 ohm coax that has no connector on the other end. The two tech...
H: Analog input like in a PLC: Thermistor or 0-10V Depending on the configuration, PLCs can often measure 0-10V, resistance or 0-20mA on the same set of screws. How to use the same screw terminal to measure resistance of an NTC element, voltages in the range of 0 to 10V or current in the mA range? Any suggestions how ...
H: What is the meaning of "do not populate test points" in a board schematic I was finding test points in a schematic of an Analog Devices Evaluation board. In one of the schematic pages, there is a clause mentioned "do not populate test points". Does anyone knows what it means ? AI: Yes, it means they are points pro...
H: Understanding current sourcing and sinking in TL2426 rail splitter I have a 40dB active bandpass filter being powered off a single rail power supply with the TL2426 providing a virtual ground so I can get a dual power supply configuration. Currently, I'm having issues understanding the concept of current sink and c...
H: Stacking M.O.T. to create an E-E core I just came across this site looking for answers on some questions I have concerning microwave oven transformers (M.O.T.). I am currently going into my third year as an E.E. student and I am trying to design a DC stick welder using M.O.T. I have been researching this topic for ...
H: Freewheeling diode position I have a pneumatic solenoid valve switching from IRF830 MOSFET. Solenoid valve connected to MOSFET by 2-3 feet long wire. It's necessary to use a freewheeling diode for this? What is the most suitable place to mount the diode ? Either near the solenoid valve or near MOSFET? P.S. This que...
H: Don't individual signal sources affect each other when using a summing amplifier? I am studying the book Electric Circuits by Nilsson & Riedel. There I learned about "summing amplifiers" and how to derive equations by applying KCL at inverting input of the op amp. I see that solving equations result in this "volta...
H: How to connect a W25Q64 3.3 SPI Flash to a 5V Arduino Mega? I need memory to read from, for my project. I first intended to use an SD card, but I now found out a W25Q64/128 SPI Flash is more practical, since I don't need to write data. However, this W25QXX Flash works with 3.3V SPI and the Arduino Mega has a 5V SPI...
H: Number guessing game:Compare numbers and position in Verilog I'm designing the number guessing game,aka mastermind,1A2B,And I'm stuck. I'm having problem with how to compare the 2 set of 4-digit numbers and output ? A ? B. ? A : when the number's position and value is correct,increase A's value,like, 1234=1234 => 4...
H: How to configure PWM on STM32F429I-Discovery Board Currently I have some difficulties on the Discovery Board STM32F429I to control the on-board LEDs via PWM. According to the data sheet of the Discovery Board the LEDs are located on pin 13 and pin 14 (PG13 & PG14). According to my research, it is possible to solve...
H: Sinusoidal wave output from a GPIO I think the question is not particularly MCU/board specified but I will be trying it on STM32F4-DISC board. I was thinking of how to output a nice sinewave from a normal GPIO output pin, but I was not able to find a proper methodology. I am asking for a method of thinking, a guide...
H: BJT output characteristics in negative Vce region? How do the BJT output characteristics in negative Vce region look like? Is it zero current or a reflection of the usual characteriscs in positive Vce region about origin? AI: Is it zero current or a reflection It is not zero and also not a reflection. You can simu...
H: Grounding an audio signal I'm building a simple audio mixer. It's going to be running from a USB power supply, so I'm using a TLE-2426 to derive a 2.5V reference voltage for the summing op-amp. My question is, what do I connect to the sleeve pin of the TRS input jack? My first thought is to use the 2.5V reference a...
H: What is actually sent/loaded to a microcontroller / STM32? I see in all tutorials or sources, everybody creates a project in some IDEs and then loads code to the MCU again via those IDEs. What is sent to the MCU? Is it a sequence of binary numbers or some different file? Is there one file that I can just send it to...
H: X86_64 Architecture, how does it handle instructions larger than 64 bits? I have been looking more into how CPU's work, and have a question. If I have a instruction that e.g. takes a 64bit address and a register, and copies the value from that address into the register. And that instruction has a 2 byte opcode. The...
H: Transistor power dissipation rating I'm trying to build the following circuit Except mine is a 24V ~20A (500W) motor, so I need to swap the components. I'm currently looking into transistors and I've stopped on the 2N6284 (NPN) transistor, which is rated at 100V 20A. This basically means it's good to up to 2000W (...
H: Practical examples to determinism and periodicity of analog signals? What I understand from deterministic signal is that we can define it as a function. Same thing is valid for a periodic signal. But periodicity and determinism are are treated as independent categories in analog or digital signal processing if I'm ...
H: Programming STM32 Black Pill with ST-LINK/V2 dongle So I recently bought the STM32F103C8T6 "black pill" dev board along with the ST-LINK/V2 dongle (more probably a Chinese clone). After much struggling I figured out that I need to hold down the dev board's reset button for the dongle to detect the MCU but then when...
H: Intuitively, why does voltage drop across a series circuit? I'm having a really rough time intuitively grasping the basics of electricity. Taking into account that current is constant across a series circuit Using water flow analogy, suppose we have a piston that’s pushing water molecules through a constricted pipe...
H: Can I use a 3 pin kettle power lead instead of a 2 pin kettle power lead I have a computer appliance that only accepts a 2-pin kettle power cord (UK plug type). I don't have a 2-pin available at the moment; only a 3-pin. The third pin that is missing is the ground connection. Would it be ok for me to use the 3-pin ...
H: What is the difference between Periodic and Non-Periodic Tx/Rx FIFO in USB? I am trying to understand how the USB module works in the very low level on STM32F4 MCUs (ARM Cortex-M4 core). In the reference manual I read often the terms Periodic and Non-Periodic Rx/Tx FIFO (I am not sure if there is periodic and non-p...
H: How to easily power multiple components with differing requirements? I'm a long-term software developer who hasn't touched a soldering iron since Uni. I've been mulling an idea for a hardware project for some time, and have cajoled a raspberry pi into managing the following devices: Touch screen e-Ink Display 2 x ...
H: Battery configuration for inverter? I have a PC with a 280 W PSU. I am thinking about buying an inverter but I am confused. I have an inverter which requires 36 VDC. Will it work if I add 3 12 V, 50 Ah batteries in series? Or shall I buy a new 12 V unit, with a 12 V, 100 Ah battery? Also if I use 3 car batteries ...
H: Is it possible to charge Li-Ion Cells in series without a Balance Charger, by using slightly lower 4.1 V per cell charging rate I have read that it is strictly not recommended to charge Li-ion cell packs in series without using a balance charger. My question is, can a balance charger be avoided by keeping the total...
H: What is the simplest instruction set that has a C++/C compiler to write an emulator for? I'm looking into writing a little software emulator that emulates/runs instructions. The easiest would be to invent my own instruction set, but I thought it would be more fun if I write an emulator for an instruction set that a...
H: Why is LTSpice Bode plot disagreeing with a linear plot? Here is a picture of an amplifier that I'm simulating using LTSpice. When I insert a sine wave of 0.01 volts and 314Hz as an input, I get this: The output is taken from the collector and is oscillating between about 2.65 and 2.35 volts. This would mean that...
H: Can I run a DDR4 module at 50 MHz? I haven't seen any restrictions about minimum clock, but I may have overlooked them. EDIT: The module is a Crucial CT4G4SFS824A, based (this is an informed guess) on 4Gb Micron 512 Meg x 8 AI: Yes, but adjust the refresh rate accordingly to make sure you hit all the rows in the t...
H: Circuit Definition This is a circuit that I've found in my old amplifier board. Experts please help me identify this circuit and please describe how it works. I am sorry for my crude drawing, but this is what I found when drawing it from the circuit board. It was built using smd components so it was a bit difficul...
H: Safe to turn variable speed AC motor on/off via wall switched outlet I have a (high velocity air) dual AC brush motor pet hair dryer (details). (There is no heating element.) It's rated at 120 Volts 18.5 Amps. It has a rotary knob (listed on the parts page as a "Variable Speed Switch and Circuit Board") that clicks...
H: Reverse polarity protection for battery powered application Im designing battery powered application and need reverse polarity protection. My system specs: 4.5v(3x AA batteries) in and system running on 3.3v. Im using MCP1711T-33I/OT LDO to convert 4.5v to 3.3v. My system will take about 50 milliamps maximum. There...
H: Heatsink on underside of PCB I have prototyped some DC-DC converter modules, and they work well. However due to size, I don't have a huge amount of copper pour for them to dissipate their heat. I have used 2oz copper but the bottom layer copper pours get really hot at higher current. Even through the solder mask! I...
H: Why does the common collector specifically have a high input impedance? When looking at a chart comparing different BJT amplifiers, the common collector/emitter/base, it is usually said that the common collector has a high input impedance, therefore it is suitable for use as a buffering circuit. The Wikipedia page...
H: LEDs flicker when I move my circuit I'm building an LED driver circuit, CD4504B and TLC5916 controlled by a Raspberry Pi: simulate this circuit – Schematic created using CircuitLab I'm finding that sometimes when I move the circuit around, the LEDs flicker. It only happens when I'm not driving the GPIOs. I've alre...
H: Corroded PCB from Rechargeable NiMH battery This NiMH battery began to leak battery acid onto the circuit board / PCB below it. Some of that acid ran down one of the wires connected to the battery and pooled up at the foot of the plug where it connects to the PCB. Here's a closeup image of the black wire with batte...
H: How do we determine the roots from a Routh-Hurwitz array? I know that we can determine the roots on the right-half plane by counting the sign changes in the first column. However, I'm unsure how to find the roots on the left-half plane. Is it the same as the right-half plane due to symmetry or am I missing somethin...
H: Constant power load SPICE model I would like to create a SPICE model for a constant power load. I'm guessing that would involve using an equation to dynamically adjust the model's resistance based on the applied voltage. How do you do this in SPICE? (I'm currently using Eagle but any SPICE2 or SPICE3 answer will wo...
H: Differential pairs or single ended signals for 1m cable I have one control board and 3 additional boards for the power electronics, that send and receive data from the control board over a distance of ~1m (3ft). All signals are single ended. I have to design the boards, but I'm not sure about the best connection me...
H: What are important uses of the "Net Tie" concept? My understanding is that the "Net Tie" is a concept introduced by Altium and useful for Kelvin connections of a sense resistor and can not be applied in any other case. Although it seems to be a useful feature at the first sight, it can't declare the exact connecti...
H: Zener diode (Power rating exceeded) The following is an exam question I encountered. In the above circuit the current across E is 180 mA. Since the current across 300 Ohm resistor is 13.33 mA, there will approximately be a current of 166 mA through the zener diode Z1. Then the resulting power dissipated would exce...
H: Charging a capacitor in Eagle SPICE I'm trying to learn the basics of Eagle SPICE simulation with a simple capacitor charging circuit. My netlist is as follows: * SpiceNetList * * Exported from untitled.sch at 21/07/2019 1:17 PM * * EAGLE Version 9.4.0 Copyright (c) 1988-2019 Autodesk, Inc. * .TEMP=25.0 * -----...
H: why neutral does not shock. how can a neutral be neutral in ac current? When I probe my city mains with one probe in the live and one in earth (which should be 0 volt) it shows a voltage of around 250v. But when I probe the neutral and the earth it shows no voltage. I know that current runs in one direction for 50 ...
H: What's the difference between 1kb(64x16) and 1kb(128x8) for EEPROM memory size? In addition to the question in the title, I have the following subquestions: I'm guessing 64x16 means something like 64 cells of 16 bytes each. Is this accurate? What is the significance (if any) of the memory being 64x16 vs 128x8? Wh...
H: Why the current on this vector diagram have coordinates like this? It is an example from a textbook. It is a really basic example and the purpose of the example is to show how vector diagram works. Here is the example: and this is the vector diagram: What I don't understand here is why \$I\$ has these coordina...
H: Using USB-6210, relay, to control a 12V double solenoid valve I am kinda new for the wiring of the relay. I have read some posts in forum regarding connecting the solenoid valve to the DAQ. But I am still not too sure how it all should be done. My objective is to use USB-6210, a crydom SSR (DC60 Series), to control...
H: Does resistance decrease over a resistor? If ohms law pertains to voltage, current, resistance across a resistor, in order for voltage to drop, and current to remain the same, does resistance drop as well across the resistor? To explain what I mean, if we have the circuit: The voltage across the first resistor dr...
H: Inversely proportional current controlled voltage source I need a circuit that senses a current and outputs a voltage, but in inverse proportion. In my case: When the current is around 0A, the voltage source should be around 18V (my Vcc). And when the current is around 8mA, the voltage source should be 5V. Can this...
H: Super Regeneration Detector This is a circuit for a remote control toy receiver. Can someone help me understand this. Connecting the antennae to the collector makes no sense to me. RF is my weakness. Datasheet where this came from is here, page 617. http://www.bitsavers.org/components/samsung/1990_Samsung_Linear_IC...
H: Using pointer of a function's returned value I would like to know if there are possibilities to change the following code: static void ser_tx_ready_ISR(void) { /* put data in tx buffer */ if ((Rb_state(&serial_tx_buff) != RB_E_ERR_EMPTY) && (Rb_used_size(&serial_tx_buff)>=1)) { Uart_put_char(Rb_...
H: Can heavy processes running in background cause lag in arduino's serial port communication with a computer? I have a Ubuntu 16.04 machine talking to a Uno board. This arduino board is sending 100 chars of line at baud rate of 115200 as fast as possible. Usually I get a line every 7ms to 10 ms (I am going to call th...
H: How do pixels in a LCD display are individually controlled by a electrode? How do tiny subpixels in the Led displays are controlled by those indium tin oxide electrode.How do they provide different voltage for each pixel AI: You will have Row Drivers (the high voltage drivers that clock the gate of the FET switches...
H: Single phase appliance on 3-phase circuit Is it possible to have a single phase socket on a 3-phase circuit? It is a 3-phase radial circuit on a 16 A breaker. The last 3-phase socket on the circuit basically wants converting into a single phase socket to be able to plug the fridge in, it is a 2 kW fridge. AI: You ...
H: How do you structure large embedded projects? Background: Junior R&D electronics engineer (the only EE in the company) - the hardware and the coding is not the problem. My biggest issue is getting a proper overview of the project, and where to start. So far I've only made minor software projects (sub 500 lines of c...