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 reconnected the OEM stereo, it didn't work either. The pin connections are shown in the photo below' When I tested pin 5 I got 2V with ignition on or off. On pin 6 I got 12V with the ignition off. But only 2V with the ignition on. Is there an easy repair without having to take power from another source... Read more ..read more

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 the run. I am using a clamp on meter that has a capacitor setting to check each one (klein cl-800). 2 out of the 3 tested within spec of the uf range on the label. The third however, has 2 resistors soldered onto the terminals. This one is the same as the other start capacitor, expect for the... Read more ..read more

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 activate it from anywhere on my property. I just want to carry a button with me that I can hit when the dogs are barking. Is there a way to accomplish this? Thanks ..read more

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 with the temperature code section/AD conversion? i have due in a week PLEASE HELP ME. Below is the details of the project: Temperature controlled fan operations: - LM35 as input for sensing temperature - If start button pressed momentarily, system operation starts. - if stop button... Read more ..read more

I don't understand why there is a 22uf capacitor on the input of lm294t. Did the designer add it because he already was using a 22 uf capacitor on the output ..read more

Hi group. I'm considering building a AM/FM/SW radio using the Skyworks Solutions SI4844-B20-GU. In reviewing the pin information, there are several abbreviations that aren't clear in what they are and what they are meant to do. These are RESET, SDIO, SCLK, IRQ (all to MCU) and LNA_EN. Additionally, can you explain how I can best utilize these pins given that most can be connected to a microcontroller unit. If you would like to review the IC datasheet, it can be found here. In... Read more ..read more

Hello everyone, I need help with identifying a transistor. I short circuited the gliding door mechanism while installing it, and the transistor broke down. I was hoping to see what was written on it once i removed it, but unfortunately not much is visible on it. Do you know what transistor i could use to get this replaced/fixed? Thanks in advance, Catalin ..read more

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 and concertinas, they are quite basic but have survived me well the last couple of years, they are basic electret capsules running on 48v phantom power. I brought the PCBs and components from Akihabara electronics market in Tokyo and I'm down to my last one and was going to order the components... Read more ..read more

I would like to use this to energize a 120vcoil on a relay but I don't know too much about the details of this sensor. Can you help me figure this out and let me know if It can be used to do what I want. Thanks T.B ..read more

I have attached an image of the circuit below. It is a up/down counter that counts from 0 to 99. It works perfectly when counting down, but when counting up, it goes ..., 39, 30, 41, 42 ... Any suggestions on how I could fix this ..read more