RRRRRTimed alarm for car (CB6776E)

This circuit was found in an EDN from the 90s. The circuit employs a double 555 and uses the courtesy light switches of the car as sensors.

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LDO from 1.2 V to 32 V x 1 A (CB1251E)
The circuit we use makes use of Linear Technology's LT3080 (www.linear.com) which consists of a...
Variable oscillator for code practice (CB7317E)
This circuit is from Popular Electronics from the 90s. The integrated circuit is not very common...
Up to 1000 W Power Control (CB16463E)
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