Quoting Dwayne Reid <dwayner@planet.eon.net>:

> Good day to all
>
> Several years ago, we purchased the assets of a L

By the way, if you create negative supply (perhaps with a
inverting boost converter) you could use a 74HC595 chain to
switch the anodes directly (just resistor networks in series).

I did something similar to this with a common anode display
some years ago, and  deliberately gave the power supply a
temperature coefficient to match the LED tempco.

--Spehro Pefhany



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