As a total beginner, I have a project of creating an alarm device for a sailing boat. The background is the following: a Mac-mini collects, by means of different computer programs, alarms from ...
I made a simple microphone with amplifier which outputs 9V max signal. It's biased in the middle somewhere around 4.5V. I hooked the output of the circuit to the computer speaker audio in. I was ...
I'm trying to use CD4051BCN chip to channel some speaker outputs from a computer. these chips handle analog voltages from +/-5V. What is the audio line max/min Voltage coming out of the desktop PC? I ...
Most 12v relays I've come across require 4v to switch on. I don't have a voltmeter handy to test my computer motherboards voltage output, and if it did give out +4v and held a long enough duration ...