RCpower
From GT RoboJackets
The power system includes all three buses (unregulated motor, isolated 5V, and isolated 3.3V), regulators, filter caps, opto-isolators, the pwr monitor circuit, and finally the battery.
Contents |
Wall
Moved wall to discussion page
To-Do
- Determine what voltage and amperage the motors are going to run at. This will ultimately be the battery voltage since the motors will be fed from the main batteries
- Get a rough estimate on current draw for the rest of the system. This dependent on how shooter will work and on rollers.
- Pick battery
- Spec out optos, regulators, and battery monitor. This should be a no-brainer
- Breadboard circuits
Power Budget
Needs to be cleaned up, but all info is correct as of 1/11/2007
| System | Voltage | Current | Power |
|---|---|---|---|
| Optoisolators 7 pcs 5?mA ea | 5V | 35mA | 175mW |
| Wireless Rx and Tx | 5V | 40mA | 200mW |
| uP | 3.3V | 5mA | 16.5mW |
| Status LEDs 2 pcs @ 10mA ea | 3.3V | 20mA | 66mW |
| Ball Sense System; (Detector + LED + Buffer) 2 pcs @ 20mA ea | 3.3V | 40mA | 132mW |
| Motor Controller 4 pcs @ 20 mA ea | 5V | 80mA | 400mW |
| Motors 4 pcs @ 750 mA ea | 9V | 3000mA | 27000mW |
| Dribbler Controller 1 pcs @ 20 mA ea | 5V | 20mA | 100mW |
| Dribbler Motor | 9V | 400mA | 3600mW |
| Kicker | 9V | 850mA | 7400mW |
| Gyro | 5V | 10mA | 50mW |
| Accelerometer | 3.3V | 5mA | 16.5mW |
| Encoders 4 pcs @ ~10mA ea | 3.3V | 40-60mA | 132-198mW |
| 555 | 3.3V | 15mA | 49.5mW |
| CPLD | 3.3V | 5mA | 16.5mW |
Totals
- 3.3V 110mA
- 5V 205mA
- 9V 4250mA
Data sheet listed power for the optoisolators as !.002 mA! so 5 mA was used instead. Encoders are still up in the air. Maxon encoders draw 5*N channels (3) mA each (10 or 15 depending on # of channels we use).
Batteries
Now has its own page RCbatts
Power Supplies
Now has its own page RCpowerreg
