Been asked by my old boy to make a circuit to flash a dummy methanometer, for a talk he is doing.
What he wants, 6 leds to flash all together once about every 10 seconds.
Looking around my bits I have
15 5mm red leds,
Lots of capacitors various values
Lots of resistors various values
10 555 timer chips
Some breadboard
Some transistors both pnp and npn
Should be able to rob a 9v battery terminal from something.
Can any knock me up a circuit using the above parts and I'll make it and keep him off my case
Thanks
Ted
The led values are
Forward voltage 1.8-2.1v
Forward current 20 ma
Reverse voltage 5v
Reverse current <=10ua
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