Eurorack DAC output
Use for DDS/DCO - LFO - ADSR - Effects unit
| Stage | Detail | Status |
|---|---|---|
| create material | sch/pcb | OK |
| gerber | OK | |
| production | ok | |
| produced | ok | |
| delivered | ok |
| Test | Detail | Status |
|---|---|---|
| Initial Inspection | OK | |
| Initial Technical Test | ATMega32A DAC | ADC not working due to GND conn to Aref |
| Initial Technical Test | STM32 DAC | |
| Initial Technical Test | VCO555 | Initial version not oscillating - add 270R across C603 to make it work |
| TL074 warm | ||
| Initial Product Test | ATMega32A DAC | |
| Initial Product Test | STM32 DAC | |
| Initial Product Test | VCO555 | |
| Power Draw | ATMega32A DAC | Proto - no DAC: 2mA -12V, 2mA +12V, 30mA +5V |
| Power Draw | STM32 DAC | |
| Power Draw | VCO555 |
| Test | Detail | Status |
|---|---|---|
| Product Test | ||
| Product Test | ||
| Quality | ||
| Quality | ||
| Long Term Product Test | ||
| Power Draw | ATMega32A DAC | |
| Power Draw | STM32 DAC | |
| Power Draw | VCO555 |
1 - No oscillation fixed by replacing C603 w resistor (tested w 270R)
1 - ADC not working due to GND conn to Aref
ADC not fast enough for audio
https://github.com/MCUdude/MightyCore
https://github.com/promesoft/KicadFormantVCO
https://github.com/promesoft/KicadJE_LFO_1
https://www.electronics-tutorials.ws/waveforms/555_oscillator.html