This circuit is from an American publication of the 80's. It makes use of components of the time. However, the circuit is the basis for a modern shield application since the input is TTL.
The circuit is from the Linear applications Handbook of the National Semiconductor of 1994. The...
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...
This filter eliminates the rumble of the motor of a record player when recovering this type of...