Simple FM transmitter (CB8728E)

Found in 90s Radio Electronics, this small transmitter has a good range. L1 is formed by 3 + 3 turns of wire 24 around a pencil as a reference.

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Rectangular Generator with Adjustable Space Mark (CB12079E)
This circuit was found in a 1978 publication. Equivalent operational amplifiers can be used. The...
330 V power supply (CB6420E)
This low current circuit is suitable for powering the previous circuit and other strobe lamp...
Headlamp timer 2 (CB6050E)
Found in an Electronic Design this circuit controls a headlamp by triggering a time determined by the...