12V x 10A power supply (CB21775E)

This power supply is from a 1977 documentation. The transformers have 11 V secondary with 10 A.

Light change detector (CB22058E)
This circuit only detects variations in light falling on the sensor. The circuit uses an LM380 as a...
Locking circuit with the LM3909 (CB14294E)
This latched switch configuration was obtained from National Semiconductor documentation on the...
Wheel of Fortune (CB20962E)
This electronic roulette circuit with 10 numbers was found in a Popular Electronics from the 80s....