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Bubble Display – HP QDSP 6064

I picked up these tiny bubble seven segment displays from Cool Components – https://www.coolcomponents.co.uk/opto/led-displays/bubble-display-7-segment-4-digit.html

They are cute little displays ideally suited to counters, watched or displaying your analog values.

They can be really power efficient too, with a 2v drop on the segments I can calculate the resistance needed for around 0.5ma. 3v / 0.0005 = 6k so with a 4.7k it is actually using 0.65ma per segment. and it is still very readable.

Code – http://www.davidjwatts.com/youtube/hpQDSP.zip

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