I could imagine the CMOS Bios Battery circuits are quite similar on all recent mainboards. What does it look like and how does it work? Background: My mainboard started draining the bios battery (an ASRock H55M). I inserted a fresh battery with 3.3v. It only measured 2.9V when I removed it, after th...

I have been working on several projects using Raspberry Pi recently, but those are now completed. And I am ready for my next project, but want to build a circuit. I have a small amount of experience with Micro-Controllers like Arduino and even made a few projects with PicAxe years ago. I know a litt...

I have a number of standalone 16u2 chips( 16u2 chips datasheet ) wired up for prototyping purposes and they are never seen by my PC (windows 7) when attached via USB (I do not mean they are an 'unknown device', I mean they do not even start the driver search) For sanity check I have wired the chips ...

I am trying to create a power-on delay with a 555 PIC ( datasheet ). I have never used one of these before and I am finding it a bit tricky to make applications with it - a lot going on. I found this circuit online https://i.stack.imgur.com/jrl4s.png My question is in relation to the power-on delay ...