Power Grid Monitor (CB21154E)

We found this circuit in a Popular Electronics from the 90s. Its purpose is to monitor a power line. The circuit uses optical couplers of the time.

| Clique na imagem para ampliar |

Battery Splitter (CB17601E)
This circuit divides the voltage of a 12 V battery by 2 and can supply currents up to 1 A at the...
Tunnel diode transmitter (CB23731E)
This CW transmitter for the 3,5 MHz band, low power, was published in a march 1961 Radio...
Delta Electronic Ignition (CB24303E)
This circuit from Delta Products was published in the May 1974 Radio Electronics magazine. The...