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Circuit to flash a bank of lights Answered

I have a bank of 30 x 6 volt lamps in an old computer console and I am trying to find a circuit to flash them in a random pattern. Ideally the lamps will be driven from a chip rather than individual transistors. I'm perfectly capable of building the circuit, but not designing it.

Can anyone point me in the right direction please?

Thank you.

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iceng

7 months ago

Are the lamps incandescent or LED or what curren per lamp ??

A multiplexer such as this can handle the switching, and you could just use an Arduino to handle the RAND SPI, but most multiplexers cannot handle much current (10mA and 5V max in this case): https://www.digikey.com/product-detail/en/analog-d...

For high voltage/high current lamps, a better idea would be to use two 1:6 multiplexers, and two sets of six logic level FETs, 6 on the hot side of the lamps, and 6 on the ground side. This way, the only lamp that will come on is the lamp with both the hot and ground FET on (similar to cMOS multiplexing).

What types of lamps? How many amps do they use?