The Quad Digital Potentiometer (QPOT) uses the MCP4251 to give four computer controlled 10 KOhm potentiometers each with 257 steps.
Features:- Microchip MCP4251
- Four 10K 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 QPOT are shown below. The Eagle schematic and board files are available here: qpot.sch and qpot.brd. The bill-of-materials is available here: qpot.txt.