Synchronized automatic switch (CB9260E)

This control circuit up to 1 kW was found in a 1967 RCA documentation. The components are from that time, and modern equivalents can be used.

| Clique na imagem para ampliar |

LM3914 with Overscale Alarm (CB25112E)
The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale...
TTL Siren (CB18966E)
This circuit can act as a shield being controlled by a microcontroller by pin 1 or 2. The...
Crystal Controlled Signal Source (CB6147E)
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...