Recent content by elvism

  1. E

    A simple non latching,I.R.switch to supply 90 ma .

    I have made an onboard uncoupling device for my model railway,It works perfectly using the circuit from a toy helicopter.Can anyone suggest a suitable circuit to make myself? I wish to use a 3.7v battery and the device uses a coil drawing 90 mA for 3 seconds from 1-2 metres range.