CIR25402S CB25378E (CB25378E)

This test instrument was found in the April 1991 issue of Radio Electronics magazine. The circuit has good signal strength.

| Clique na imagem para ampliar |

Robot Voice (CB4410E)
We find this microphone voice effect in 1992 documentation. The vibration of the relay contacts...
Signal Follower 4001 (CB5890E)
We can also use the 4011 on this CMOS circuit that makes use of a crystal headset. The power...
Voltage Controlled Oscillator (CB20115E)
We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today,...