We found this circuit in a 1982 documentation. It uses a CA3140 or equivalent operational amplifier and does not require a symmetrical source. The output is 1 Vpp wide.
Many collectors of records, tapes and even audiophiles often keep recordings on tapes that...
This simple circuit, from a 2006 documentation, activates a 12 V lamp in the event of a power...
We obtained this configuration from an old RCA manual of linear integrated circuits. The...