60 seconds delay lock (CB7231E)

This General Electric circuit triggers on after 60 seconds. The circuit is from 1967 but can be implemented with current components.

| Clique na imagem para ampliar |

Variable Power Supply for the Experimenter (CB16079E)
The power supply shown in the figure provides voltages between 0 and approximately 15 volts, with...
Ring Oscillator 4011 (CB24865E)
Another triggered oscillator that we found in the November 1984 Radio Electronics magazine. The...
Battery Tester (CB6517E)
Found in a 1980s German publication, this circuit tests batteries by type. The circuit is based on a...