We found this circuit in a 1987 documentation. It is a multi-tester with neon lamp and LEDs operating with both low continuous voltage and high alternating voltage.
This Audio System circuit was found in 1965 documentation. It is a 50 ohm line circuit with 22 dB...
This 1.5 A circuit has the output voltages adjusted by a selector switch. We found it in a Popular...
Three LM158, LM258, LM358, or LM2904 operational amplifiers are used in this instrumentation amplifier....