Summary of DS1669 Digital Potmeter UP/DOWN using microcontroller
This project enables digital control of a Dallas DS1669 digital potentiometer using an AT90S1200 microcontroller and a standard potentiometer, offering smoother wiper adjustment compared to the typical two-button method. The design incorporates a crystal oscillator for timing and includes necessary components for voltage regulation, filtering, and signal conditioning to interface with the digital potentiometer effectively.
Parts used in the DS1669 Digital Control Project:
- 1x AT90S1200-12PI
- 1x DS1669 (Dallas)
- 1x 78L05
- 2x 1N4007
- 1x 4MHz Crystal
- 2x 27pF Capacitors
- 1x 22pF Capacitor
- 1x 47uF/16V Capacitor
- 1x 100nF Polycarbonate Capacitor
- 3x 100nF Multilayer Capacitors
- 1x 100 ohm Resistor
- 1x 10k ohm Resistor
- 1x 820 ohm Resistor
- 1x 100k Trimpot
- 1x 10k Linear Potentiometer
1x DS1669 (Dallas)
1x 78L05
2x 1N4007
1x 4MHz X-tal
2x 27pf
1x 22pF
1x 47uF/16V
1x 100n polycarbonate
3x 100n multilayer
1x 100 ohm
1x 10k ohm
1x 820 ohm
1x 100k trimpot
1x 10k lin. potmete
DS1669 Digital Control:
With this circuit you’re able to control a Dallas DS1669 digipot with a normal potmeter. Usually you control the DS1669’s wiper with 2 push buttons (up/down) Disadvantage: Slight delay.
The software….
Here you can download the datasheet of the DS1669.
Here the hex-dump (GNU). You can upload this hex data into the AVR with this programmer.
For more detail: DS1669 Digital Potmeter UP/DOWN using microcontroller
