Found in old American documentation, this circuit that can be used as a shield, activates two relays and a neon lamp with different voltages.
Using LM3909 integrated circuits, this circuit was found in an American documentation from the...
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
Found in a 70’s documentation, this circuit can operate with signals up to 10 MHz. The operational...