All Questions

I am programming a stm32 (2 wire SWD: SWDIO and SWCLK) series MCU with a j-link V2 i cut off a nucleo board. I usually just connect the 3V3 supply off of my arduino, but atm i am trying to make a box ...

Imagine that you making a hardware system, which you need to control/monitor through the PC. There are multiple peripherals, which you need to control, but the number of them changes depending on the ...

i have a drone which is controlled with remote using 2.4g radio signals but i don't have the remote so i want to make one on my own but ran into problem with the radio circuits, is there any ...

I need to run 12vdc about 50' along a fence that already has several 12 gauge galvanized steel wires running on it. Going to be pulling less than 7amps at most. I can make sure the lines are not ...

I have a Flymo 1200R robotic grass lawn mower. The auto mower detects the boundary position of the edge of the lawn through a low voltage electrical wire that is buried close to the lawn edge which ...

Hi, I am using this circuit to switch power supply to a load. I have gone through the datasheets and this looks likes it is okay. But, could someone please confirm if the the circuit used is alright? ...

I would like to measure the resonant frequency automatically in LTspice, i.e. with the command ".meas" of the following waveform. Is it possible to do it by using the FFT plot? I have tried ...

I am using stm32f103c8 and External Clock Crystal (LSE). I connected the Vbat with a 1220 coin battery. But when I turn off VDD and turn on the micro again, the time and date are all zero. Why time is ...

Why does the automotive industry sticks with 5V sensor outputs instead of something like 4-20 mA? Wouldn't it be a solution less prone noise? What are the advantages in using a 5V output instead of a ...

I changed my bedroom lights yesterday for 220V 7W dimmable LED lights. My bedroom dimmer is an electronic type (LightwaveRF). In the pitch black, last night, I could see the lights faintly glowing/...

I'm looking inside an Inform brand UPS. On its communication board there are 6 chips. Four optocouplers, one NE555 timer and a mistery IC, pictured below. The communication board only has the USB-B ...

The first step in a TWI transmission is to transmit a START condition. This is done by writing a specific value into TWCR, instructing the TWI hardware to transmit a START condition. Which value to ...

For a prototype project I'm building, I need to select a motor. I'm not familiar with different types of motors, so I have been trying to do some research. However, most of the stuff I have been able ...

I just wanted to hear if anyone can recommend a free, good electrical engineering calculator program for Windows (I know of Mathcad, but that is expensive)? Specifically one using engineering notation ...

I am working on micron,s serial nor flash memory of 512Mb with renesas microcontroller,I need to write some data onto flash memory and read it back.As per standard method of working with flah memory ,...

I take long timelapses, for astrophotography. My camera's batteries are irritatingly short-lifed for this purpose, and so I wanted to try an alternative. I found .stl files for 3d printing the form ...

I'm trying to sample a 0-10V DC voltage as an input to my circuit. I use the following circuit to achieve this: simulate this circuit – Schematic created using CircuitLab The problem I have is ...

Our company have been designing and manufacturing custom circuit boards for some 10 years now, and up till now by far the most common reason for board failure has been a mechanical shock - heavier SMD ...

I am very new to all this so any and all help is appreciated. I am planning to make an proximity IR sensor using watching some DIY stuff online and i was wondering what component on the sensor module ...

I am looking for a solution to step-down the 12V 82A from a server power supply to charge a 3S2P supercapacitor to 8.1V. Not sure which buck converter to go or if there are any specific limitation to ...

I have read a lot about using high frequency square/rectangular wave pulsed DC for motor speed control aka PWM-ing, but my question is a bit different. What if I run a DC motor with a low frequency ...

I have an amp (denon pma-1060) that has small 330pF ceramic caps directly soldered between it's speaker outputs and the chassis. But I don't know what is the purpose of them. Why are they there?

I want to build a Tesla coil with mains voltage. I found a schematic online but it uses an irfp460n MOSFET which can handle 500v (Vdss) but I only have couple of irfp260n and irf250n MOSFETs with 200v ...

My application requires a current source with variable frequency. The amplitude of current will be around 10nA. The frequency of current to be more than 100Hz. I'll be highly obliged if someone helps ...

guys, I'm learning stm32f401x mcu. All I have is an rm0368 reference manual pdf file. No mcu chip right now. From the manual, I learnt that PSC instead of ...

If have designed the following circuit to convert a certain analog signal of an amplifier to digital pulses. The circuit works well - except for one point. My prototype PCB has 4 of these amplifiers ...

I was reading through the documentation of the AXI standard when I came across the interconnection matrix shown below. In short, the interconnection matrix provides a path for several masters to ...

Hello I was wondering if i can ommit the dedicated bypass of a specific IC if the IC is very close to the output capacitor of the supply rail In the immage above i have an LDO and its 0.1 uf output ...

So It's my first time dealing with those "bench power supplies" I got this model ==> DAZHENG PS-1502D and for some reason when I try to scroll the voltage bars It is not showing any ...

I am controlling three LEDs, and need to be able to toggle between them individually with a switch. Is this achievable with a DPDT switch? I'm not sure where I can find a switch that has one input and ...

i am having trouble with the spaces on my circuit and removing the two pull-up/down resistor on the enable pins would solve my problem ( if of course it doesnt cause other problems). I was wondering ...

I'm trying to solve the following circuit, obtaining all the currents and voltages. I'm using mesh analysis method, but I'm ending with wrong results. So I assumed by default a clock-wise loop for \$...

I am beginner in electronics, I am wonder about microchips that can transmit data between themselves using Bluetooth. I want to play around with them like the estimate connection, send data, receive ...

I have too many failures with very basic gate chips, while the more complex chips seem to keep working fine. And I find that very puzzling. These aren't even CMOS where I know that a static discharge ...

I would like to connect up to 4 pair of earbuds (the in-ear type, stereo, with a TRRS connector and a tiny condenser microphone located along the cable, think iPhone wired earbuds) to a single ...

I am going to buy a distance sensor and there two are available in shop. Both are distance sensors. I want to know the difference between the two sensors.

I've bought a 4.3" TFT LCD Car Monitor for a project, and The box says it runs on 12V(+/-10%). I've tested it for a bit and It even runs on as low as 6volts.. I've read multiple threads on forums ...

I've got a TCMT1102 Vishay optocoupler. Its a 4-pin SMD part but there is no standard package type associated on the datasheet - i.e SOP, SSOP, TSSOP etc. Vishay has a footprint document that ...

An Arduino project of mine involves measuring the amount of water that falls through a liquid dispenser. It is imperative that this value is EXACT since this will be used for further calculations. Now,...

On my understanding, a LockIn amplifier use an internal (or external) signal source, set to a given frequency, say x. The system locks into that frequency, which means only that frequency can be ...

I'm doing this project where I'm replacing original NiMh battery (6V pack made up of 5 units of 1.2V cells) with a modern LiPo one. I'm using a pouch style battery, which has 3.7V that is definitively ...

I am attempting to use some of ERNI's PowerElement parts but the associated datasheet and catalogue does not appear to be clear on the associated press fit feet https://www.erni.com/en/products-and-...

https://www.ebay.co.uk/itm/124258506002 How do I wire this power supply? It doesn't seem to have any connections and in my mind, it needs two for mains voltage, 2 for 12v out.

A previous iteration of my circuit was as follows: I am sensing DC voltages across 6 variable resistors (1kΩ Pt RTDs) The 6 resistors are connected in series; the series is connected to a current ...

I'm new to microcontroller in general and after playing around with an arduino I would like to go further by using an esp8266 resp. ESP-WROOM-32 and play around with it. I'm programming them via ...

Can someone help me understand what is the device from the picture and what is its function? It was added by the electricity company after they upgraded the power wires and poles. All wires go to the ...

I have been using the 74LS161 for some tinkering, and then switched to the CD4040 because it had 3 times as many counter stages in the same package size, and I don't need preset for my purpose. Early ...

Question: Below figure represents an approximate equivalent circuit of a field effect transistor amplifier. Using KCL find the output voltage \$v_2\$ in terms of input voltage \$v_1\$. My try: I ...

I have 18650 (UR18650F) cells I would like to charge using a LM2596 DC-DC Step-down Adjustable CC/CV board, which has 3 adjustable pots. The instructions on using it for charging are as follow (quoted ...

Is there any way to make a circuit of chaos based system of differential equation, and choosing the values of capacitor and resistors? I tried to solve this question and search as well but still not ...