Using calculator as count circuit

Published:2011/5/5 7:53:00 Author:Nicole | Keyword: calculator, count | From:SeekIC

This circuit uses MM7536calculator chip, two DM75491 segment drivers and a DM75492 bit driver. Those three drivers are used to drive NSN66A LED 6bits display. This counter is manual controlled by three switch. In order to restoration, it can use S1 to make calculator reset. S2 can input 1, if it needs to press new number, you can connect to S3, Vcc provides current to LED through limiting resistance, because Vcc's voltageis lower than Vss, so this method can save power consumption. This circuit can drive lager LED display.



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