joliebrise
New Member
Having spent hours searching the web for code for a digital variable resistor I came across this 8 pin chip. It appears to do everything I want for up/down push button control with a memory storing the last wiper position.
Maxim Integrated. Dallastat. DS1809-010
10k, 4.5 to 5.5v, 64 positions, Non-volatile (ie. Has a memory), Std 8 pin chip.
www.farnell.com. UK – DS1809-010 Cost £4.20 inc p&p/vat. (x 5)
Single button pulse 1ms to 0.5sec
Multi-pulses every 1ms
Continuous pulse- push/hold lasting longer than 0.5sec
No de-bouncing circuitry necessary.
External diode and capacitor provide additional power for the auto wiper memory storage.
Current 25uA standby, 1000uA active. Wiper current 1mA
Tech details from Farnell.com
Maxim Integrated. Dallastat. DS1809-010
10k, 4.5 to 5.5v, 64 positions, Non-volatile (ie. Has a memory), Std 8 pin chip.
www.farnell.com. UK – DS1809-010 Cost £4.20 inc p&p/vat. (x 5)
Single button pulse 1ms to 0.5sec
Multi-pulses every 1ms
Continuous pulse- push/hold lasting longer than 0.5sec
No de-bouncing circuitry necessary.
External diode and capacitor provide additional power for the auto wiper memory storage.
Current 25uA standby, 1000uA active. Wiper current 1mA
Tech details from Farnell.com
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