Power Zero
The Power Zero is a renewed, high-quality power module standard based on the ACSP7. Offers extremely accurate measurements across the entire current and voltage operating range. mRo is the first company to introduce a non-invasive, Hall-effect current sensor for UAV/Robotics application and high-precision voltage dividing circuit for consistent and reliable measurements.
Compared to the ACSP7, the .5v offset is removed and the current sensing is compared with a dedicated power reference. The integrated electrolytic capacitor reduces voltage spikes which result from longer input cable lengths and higher voltage batteries.
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Features:
Section titled “Features:”Dual internal power supply to improve the stability of the Hall-sensing.
Specifications
Section titled “Specifications”Electrical:
Section titled “Electrical:”- 50.4v 12s lipo
- 90 Amps – Max Current Sensing
- 5.3V, 2 Amps power supply
Mechanical:
Section titled “Mechanical:”- Board Weight: 2.50g (0.08 oz)
- Board Dimensions:
- 18mm x 18mm (.70″x.70″)
- Height: 7.30 mm (0.28″)
Parameters
Section titled “Parameters”Ardupilot settings:
| Parameter | Value |
|---|---|
BATT_VOLT_MULT | 15.30 |
BATT_AMP_PERVLT | 50 |
BATT_AMP_OFFSET | 0.00 |
Latest units come with a printed ticket with the voltage and current multipliers calculated for the specific board, to take into account physical variation among passive components.
Connector pinout
Section titled “Connector pinout”6-pin JST-GH
| Pin | Color | Signal | TTL/Voltage Level |
|---|---|---|---|
| 1 | red | VCC | 5.3V |
| 2 | black | VCC | 5.3V |
| 3 | black | CURRENT | 3V3 |
| 4 | black | VOLTAGE | 3V3 |
| 5 | black | GND | N/A |
| 6 | black | GND | N/A |