I used it today for small 0805 LEDs- the piece of paper inside got lost which shows the color.
With this circuit, you only need to touch one pole from the coil and hold the LED- it lights up!
Its also faster for other LEDs, handling 1000s of them some always go astray and over time they accumulate.
the transistor doesnt burn out but so far I've been afraid to test with two batteries.
For larger brightness, and to be able to light up even green neon lamps.
Or the coil needs more research. i want to try a smaller one with fine wire, and a larger 10mH coil with more turns.
The board was sitting around for weeks, it drains zero power when off, start with pushbutton, turning off by touching the two coil poles with a finger (the voltage doesnt produce any sensation).
Maybe its limited by the 2n3906? But it must be more than 60 volts. High voltage transistors have such low hFE that they dont do well for these circuits.
With this circuit, you only need to touch one pole from the coil and hold the LED- it lights up!
Its also faster for other LEDs, handling 1000s of them some always go astray and over time they accumulate.
the transistor doesnt burn out but so far I've been afraid to test with two batteries.
For larger brightness, and to be able to light up even green neon lamps.
Or the coil needs more research. i want to try a smaller one with fine wire, and a larger 10mH coil with more turns.
The board was sitting around for weeks, it drains zero power when off, start with pushbutton, turning off by touching the two coil poles with a finger (the voltage doesnt produce any sensation).
Maybe its limited by the 2n3906? But it must be more than 60 volts. High voltage transistors have such low hFE that they dont do well for these circuits.
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