For example when you build a circuit you have the board and the components between them is air. Is there a clay like material that will act like air does? Application: you could …

I'm looking for an alternative to the conductive thread (since i lack some sowing skills). I have seen this: http://www.littlebirdelectronics.com/products/silver-conductive-pen …

For the last few days I have been trying without any luck to find a good tutorial on simple circuit simulations. I am a relatively new hobbyist and I figure if I use simulations an …

I need to build a transistor circuit to go up from 3.3v (output of serial port) to drive some mechanical relays which require 24v input. Thoughts?

Hi I'm looking to better understand basic RF receiver circuits, and I thought building a basic AM 77.5 kHz receiver seemed like a good challenge. I do however have had quite a cha …

I don't have much experience with electronics, but I think what I want to do could be cobbled together from a radioshack. I have a Dig 5006-IP automatic sprinkler controller. It c …

I am trying to understand the principles of a RC charging / discharging circuit however I'm at loss regarding certain aspects of its operation. I have a square wave generator givi …

What are the advantages of stranded vs solid wire? what should i be using for prototyping circuits?

I can't seem to get over this but this seems to be the basics in electronics. I have an NPN darlington transistor TIP122 and have built to simple test circuit around it with Rb = 1 …

Need help confirming some hunches. I'm trying to figure out what type of circuit this is: http://img442.imageshack.us/i/78389584.jpg/ Any ideas? Also, I think the logic expressio …

Some sound card audio jacks can now inform recent Windows OS's that an audio device is plugged in. Anyone know how it does this? I'm thinking it uses some kind of voltage compara …

It do provide the full set of logic functionality,but its arithmetic functionalities are not so clear,which do not contain a minus b and a plus b at the same time. Could you provi …

Do you know of any freeware or low cost circuit / PCB design software? I know a few which I have listed below but I was wondering if there were more of its kind. Please mention th …

Anyone got any super simple circuit designs for converting 1.5v dc to 9v dc? Maybe something that uses a couple of transistors would be good?

Hi everyone, I bought three spring-return, push-type solenoid. I can't remember them being sticky from the start because I only was using one at a time, but they may have been. N …