Model train speed control

Posted on Sep 9, 2012

Virtually any NPN small signal transistor may be used in place of the BC 108 shown. Likewise any suitable NPN power transistor can be used in place of the 2N3055. The output transistor must be mounted on a suitable heat-sink. Short circuit protection may be provided by wiring a 12 volt 12 watt bulb in series with the output

Model train speed control
Click here to download the full size of the above Circuit.

This will glow in event of a short circuit and thus effectively current-limit the output, it also acts as a visual short-circuit alarm.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    PAL/NTSC Video Time/Date Generator
    8 LED`s Audio VU Meter
    IR Digital Thermostat for FAN
    Mains Pulse Circuit
    making of wireless car
    atmel isp
    Telemetering Beacon For VUSAT
    Audio Clipping Indicator
    Spike Detector For Oscilloscopes
    DMX PC Keyboard Interface circuit
    Play Games with Nixie Tubes