This circuit found in a 90s Popular Electronics, triggers a huge array of LEDs from the sounds captured by a microphone, thus generating visual effects.
We found this circuit in an old documentation. The operational can be of any type and the...
Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz....
Found in a Popular Electronics from the 90's, this circuit converts a 40 V symmetrical source to a 5...