Original Touch Potentiometer
Available at tindie (and now in a digital-only version). The digital-only version does not include the AD5262 chip and has white LEDs.
This is the original design for the Touch Potentiometer and formed the basis for the Sparkfun collaboration . It is functionally identical to the Sparkfun version other than the color of the LEDs and requires a 5V power supply (does not have a built-in regulator). It works with the same demo sketches and tputil program.
This is the original design for the Touch Potentiometer and formed the basis for the Sparkfun collaboration . It is functionally identical to the Sparkfun version other than the color of the LEDs and requires a 5V power supply (does not have a built-in regulator). It works with the same demo sketches and tputil program.
Features
- Dual host interfaces: Logic-level serial and I2CTM
- Dual 8-bit 20 k-ohm 3-terminal digitally controlled variable resistor outputs
- PWM output
- 8 LED display with multiple display modes and intensity levels
- Option for interpolated (soft) changes between touches
- Configurable touch sensor parameters for a variety of PCB covers
- Easily configurable I2C address to allow multiple devices on one bus
- Configurable linear or non-linear PWM transfer function
- Configurable linear or simulated logarithmic variable resistor transfer function
- Variable resistor supports single- or dual-supply operation
- Simple register interface with jabber option
- Programmable power-on default operation
- Built-in calibration procedure
- User-accessible EEPROM data storage
Applications
- Analog potentiometer replacement
- Stereo channel audio level control
- Computer peripheral
- Embedded system control
- Dimmer for LED lighting applications
- DAC replacement
Downloads
tputil program
User and programming manual.