Very strong audio spikes in a headset can damage the ear. This circuit, from a 90s Popular Electronics cuts them, being originally indicated to operate with an integrated amplifier of the time.
This isolated shield uses a common optical coupler that supports several equivalents. The resistor in...
This circuit was found in the Optoelctronics Sourcebook from Texas Instruments. The circuit has a...
We found this circuit in a Popular Electronics from the 80s. It is a game of reaction speed for 3...