Why do they use half the reference voltage 2.048 on the positive terminal of the U4A op amp to provide a 2.048 reference voltage for the negative terminal of the a/d converter?
Not having too much luck with this pedal I bought as a project. I am able to get power and bypass but no actual signal when its switched ON. I did take it to a shop to have it looked at and had a...
https://www.electro-tech-online.com/threads/help-with-diy-guitar-pedal.166084/
Hi, I recently acquired my PIC16F1939 for driving LCDs for my watch project. I am hoping to fit it inside a wristwatch but if I can not do that I will just use large static LCDs to make a clock....
Hi, does anyone know if there is a way to find NFETs for Synchronous Bucks?...How to search them?....As you know, a NFET for a Sync Buck must have Cgd at least 100 times less than Cgs. There is n...
https://www.electro-tech-online.com/threads/searching-for-synchronous-buck-converter-nfets.166023/
Hi All, I made my first STM32 board using STM32G0B1RE, it arrived today, since it's blank I expected the MCU to jump into bootloader and start the DFU, however this did not happen, MCU was not ...
https://www.electro-tech-online.com/threads/help-with-stm32g0.166079/
Hi to all, I haven't been here in a long time, I have a busy life... I have this project in mind... actually it is not in mind anymore, it is near completed; I have a generator that is connect...
https://www.electro-tech-online.com/threads/no-contact-ac-voltage-sensing.166081/
I have these two relays from a company called Baomain. Timer Relay TBT7-B2 (Delay on) Timer Relay TBT7-C2 (Delay off) Id like to know how to configure them. I cannot seem to find a datasheet ...
I want to attach all 8 tabs to the circuit board as heat sink but can I attach all 8 on together on the circuit board?
https://www.electro-tech-online.com/threads/mosfets-drain-n-type-the-tab-on-to-220-mosfets.165965/
For context, my end goal is to have buttons that, when pressed, tell my controller that I'm touching a certain part of the touchpad. I got an idea from a reddit post about a similar-ish idea. Ign...
https://www.electro-tech-online.com/threads/need-help-with-a-controller-modification.166075/
I recently purchased a 2009 Seat Leon. I decided to remove the OEM Stereo and try out the Android HU I removed from my previous car. Unfortunately it didn't work. Not only that but when I reconne...
https://www.electro-tech-online.com/threads/seat-leon-stereo-not-working.166066/
Dear Everyone I have an anomaly with a spare reference board on my IRD245 dynamic balancer. The board itself was one a was given a replacement for twenty odd years ago and I de-populated it thi...
https://www.electro-tech-online.com/threads/ird245-reference-board-troubles.166080/
I have found videos detailing how to make a good high frequency anti barking device using a frequency generator and a couple tweeters. But what I'd like to do is add a remote control so I can act...
https://www.electro-tech-online.com/threads/sonic-bark-deterrent.166063/
Hello, Im trying to make a UV lamp to cure UV resin, because of the price of other systems I decided to buy my own UV 9W electric bulbs to wire them up. Now the issue Im running into is that no...
https://www.electro-tech-online.com/threads/cant-light-up-uv-lightbulb.166076/
Hi, I'm wondering if someone here could possibly help identify a component. I'm an accordion maker with at best basic knowledge of electronics and sometimes I build microphones in the accordions ...
Hello! im doing a simulation mini project (TEMPERATURE CONTROLLED FAN) using PIC16F877A on Proteus and MPLAB IDE V8 for coding. i need help with my assembly code. i think there is something wrong...
So my car's cigarette lighter is always powered even when the car is switched off. I am attempting to make it switched so that the power is only on when the key is turned to accessory. I made a b...
Hi all, first I am not an electronics guys so sorry if I have any errors in what I am trying to explain. I have a single phase 220v air compressor that has 3 capacitors. Two are start and one is ...
Hey everyone, I have a very old pillar drill press from 1981 (Draper). It has a green on and red off button on the side. I wondered how I can take power from the drill press when the green/black ...
Hi, Ever since I designed and simulated a digital watch with logic gates for one of my electronics classes in university I had this urge to take that design and make it reality with only transis...
Hi guys, I know this gets asked alot, however as things change so quickly these days i'm looking for recommendations for DMM. In an idea world I would go for something like a tenma 72-7755 seco...