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Circuit Bench

  • Under-temperature switch (CB9357E)

      Found in Radio Electronics from the 90s, this circuit uses a thermistor as a sensor that can have...

  • Brightness control for LEDs (CB9711E)

      This automatic brightness control that uses an LDR as a sensor, was found in American...

  • SCR speed ​​control (CB23559E)

      This circuit is from a Radio Electronics from April 1964. Note the unijunction transistor of the...

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