Len Bayles has designed a great looking Meter Clock which is based on the Atmel AT89C2051 microcontroller. The design is similar to the Multimeter Clock that I created. Len provides the code and schematic on his site so you can make your own.
“The software in the microcontroller handles the count for the time. It “talks” to a 4 channel Digital to Analog converter to derive the voltage to position the needles on the three meters. The outputs of the D2A converters are buffered with a quad amp. Otherwise the current draw of the 1ma meters would exceed the D2A converter.”
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