Shared Projects by CedarGrove

AD9833 ADSR Waveform Generator FeatherWing with amplitude control: An Adafruit Feather-compatible module. The Waveform Generator with amplitude control produces an op-amp buffered sine, triangle, or square wave output with a practical frequency range of 0.5Hz to 100kHz with 0.1Hz resolution. Frequency accuracy and stability is determined by the 25MHz clock source. Waveform Generator control is via the Feather SPI bus; chip select is provided by the Feather’s D6 logic pin. Output signal peak-to-peak amplitude is I2C controlled with an AD5245 8-bit digital potentiometer (10K, 256-step). Peak output value is potentiometer adjustable with a maximum unipolar output of slightly less than 3.3 volts. The wing derives its power from the host Feather’s 3.3V power.

AD5245 Digital Potentiometer Breakout: A small breakout board for testing the 10K AD5245 digital potentiometer.

AD9833 Precision Waveform Generator FeatherWing: An Adafruit Feather-compatible module. The Waveform Generator produces an op-amp buffered sine, triangle, or square wave output with a practical frequency range of approximately 0 to 300KHz with 0.1Hz resolution. Frequency accuracy and stability is determined by the 25MHz clock source. Waveform Generator control is via the Feather SPI bus; chip select is provided by the Feather’s D6 logic pin. Output signal peak-to-peak amplitude is adjustable with a maximum unipolar output of slightly less than 3.3 volts. The wing derives its power from the host Feather’s 3.3V power.