Flasher CA3130 (CB22004E)

Found in an English documentation from 1977, this flasher or pulser circuit drives an LED. The frequency depends on C2.

Crystal Calibrator (CB22317E)
This circuit was found in an American documentation from the 60's. The circuit generates two...
Audio Frequency Meter (CB12298E)
This circuit is intended for measuring audio signals. We found the circuit in a Popular...
Two Phase Voltage Controlled Oscillator (CB13741E)
This circuit was found in an English technical documentation from 1973. The circuit generates...