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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Binary Indicator (CB6700E) This circuit was obtained from old documentation but can be used as a shield in a modern application. The SCR can be 106 series and a general-purpose transistor. a href="images/sto"
Binary Indicator (CB6700E) This circuit was obtained from old documentation but can be used as a...
Crossing Signal For Railroad Modeling 3 (CB3856E)
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...
Acoustic Delay Circuit (CIR25263E)
This delay circuit for a sound system was found in the December 1990 Radio Electronics magazine as part...