Power Budget
By: Ameen Alattas
| Devices | Quintity | Operating
DC volt.(v) |
Max Current
(mA) |
Operating
Current (mA) |
Total Current
(mA) |
Power
(mA) |
Margin of error |
| Micro
Arduino |
1 | 5 | 50 | 45 | 45 | 225 | 0% |
| Servos
MG92B |
12 | 5 | 448
(Stall) |
200 | 2400 | 12000 | 15% |
| HC-SR04 | 1 | 5 | 15 | 15 | 15 | 75 | 0% |
| MPU6050 | 1 | 5 | 7 | 5.1 | 5.1 | 25.5 | 0% |
| HC-06 | 1 | 5 | 45 | 40 | 40 | 200 | 0% |
| TLC5940 | 1 | 5 | 120 | 95 | 95 | 475 | 5% |
| Total | 2600.1 | 13000.5 |
* All values are measured
As shown on the table, there are have six devices (Micro Arduino, Servos, HC-SR04, MPU6050, HC-06, TLC5940) that are operating on 5 volts. It was chosen to use 5 volts instead of 3.3 volts for the HC-06 because the module being used has a built in voltage regulator for 5 volts to 3.3 volts. The provided operating current and power are the actual values for all devices except for TLC5940 and servos. The TLC5940 uses current from 60-12 depending in how many servos attached to it. Since the group is using 12 servos it is assumed that it will draw about 95 mA. That’s why the 5% margin of error still present. The servos, it depends on the weight that it will be carrying. Which will result in a current draw from 100mA-230mA. It was decided to go with 200mA for a 15% margin of error.