| Voltage Measurement | Input Range | Info |
|---|---|---|
| D4 - 2 Channel, 24-bit ADC | ±4V | High resolution ADC module. Can be used as an alternative to a Keithley DMM. |
| D4a - 2Channel, 24-bit ADC | ±4V | Redesign of the D4. Added functionality: can be used as break-out module and can do automatic calibration. Recommended over D4. |
| D4b - 2 Channel, 24-bit ADC + microcontroller | ±4V | Hardware identical to D4, with an added high speed ARM Microcontroller. Can run at higher sample rates and store data locally. Can synchronise with a D5b module. In development |