Full Wave Control (CB6554E)

This 1968 Texas Instruments circuit uses diacs of the era. SCRs can be modern equivalents according to the controlled load.

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RAM Backup (CB24835E)
This circuit is from an August 1984 Radio Electronics magazine. It monitors the state of a RAM...
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In the figure we have the way to obtain an adjustable constant current source of 2 mA. The...
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