The TinyQED is an ATTiny45 based widget that counts the pulses from a quadrature encoder and makes them available via I2C.
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The Renbotics Servo Shield Rev 2 is an Arduino-compatible shield that uses only two pins to drive 16 servos per shield. The Renbotics Servo Shield Rev 2 uses a PCA9685 over I2C to provide 16 free-running servo outputs. The address of the board is selectable via a DIP switch making it easy to stack up to 62 shields to control up to 992 servos. Two jumpers make it easy to select the Arduino host model used.
The Renbotics Side Shield makes it easy to extend your Arduino shield stacking sideways, remap conflicting pins between shields, and simplify using 3.3V shields with 5V Arduino’s or compatible.
The Renbotics Servo Shield is an Arduino-compatible shield that uses two 4017 decade counters to drive up to 16 servos using only 4 pins (digital pins 6 to 9) and as little as one 8bit timer (Timer 2) in standard mode or two 16/8bit timers (Timer 1 and Timer 2 for Duemilanove or Timer 3 for Mega) in high accuracy mode. It also includes a 196 point breadboard style prototyping area.