Delayed relay (CB10191E)

This simple SCR delay circuit for activating a relay was found in documentation from the 1980s. The components used are common today.

| Clique na imagem para ampliar |

Voltage Controlled Oscillator (CB12016E)
This VCO or Voltage Controlled Oscillator uses common components. TR1 can be a BF245 and TR2 a...
Thermostat (CB6012E)
This control for a heating element was found in an old documentation. The current in the element...
Electronic Die (CB12266E)
By pressing and releasing PB1, only one LED is lit, drawing a number from 1 to 6, as in a die. The...