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  1. 16-02-2020 #25
    john swift's Avatar
    Lives in merseyside, United Kingdom.
    john swift
    Last Activity: 18-01-2021 Has been a member for 6-7 years. Has a total post count of 257. Received thanks 53 times, giving thanks to others 0 times.
    only just found this thread

    I would add a diode to block reverse leakage current through the LED when the switch is open

    a 10K resistor between the base and emitter will prevent the base from floating when the switch is open

    original circuit
    Click image for larger version.  Name: original circuit.jpg  Views: 123  Size: 26.4 KB  ID: 27406

    revised circuit

    Click image for larger version.  Name: revised circuit.jpg  Views: 116  Size: 32.0 KB  ID: 27407

    john
    Last edited by john swift; 16-02-2020 at 03:16 PM.
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