This circuit makes use of an operational amplifier from the 80's. The circuit can be implemented with modern transconductance operational and TTL logic working as a shield.
This FM transmitter was found in a 1997 magazine but can still be easily assembled. 18-wire in the...
Other operational amplifiers can be used in this conventional filter that rejects only one...
This fuzz guitar circuitry was found in an American documentation from the 80's. Transistors can be...