Demand Peripherals             Robotics and Automation Made Easy


DPOT: Dual Digital Potentiometer

The Dual Digital Potentiometer (DPOT) uses the MCP4251 to give two computer controlled 50 KOhm potentiometers each with 257 steps.


- Microchip MCP4251
- Two 50K Ohm potentiometers with 257 steps
- Typical wiper resistance is 75 Ohms
- Uses the ESPI 7474 circuit for reliable operation


The schematic and layout of the DPOT are shown below. The Eagle schematic and board files are available here: dpot.sch and dpot.brd. The bill-of-materials is available here: dpot.txt.