7 Segment LED display counter module

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Uploaded by on Apr 15, 2011

555 driving a 4026 driving a 7 segment LED display powered by a 9 volt battery.

For those interested, the capacitor is 1uF, and the trim pot is 100k. The resistors at the bottom of the display are two 330 ohm in parallel-- I wasn't sure what thactual resistance I needed was going to be, so I went with 330, and then tried the second one, which brought it down to 165ohms. I could probably go lower, but I'm not going to trouble myself over it.

I do not have a schematic specific to this circuit as I just followed the data sheets for the individual components and put them together.

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