The goal of this project is to create the smallest and cheapest Internet Controlled FPV Video Tank Robot
Sometimes you can drive the robot on VigiBot.com
Total Cost: $101.61 |
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| Tank Chassis | $18.98 | Amazon.com B076SY149C |
| Raspberry Pi Zero W | $20.80 | Amazon.com B075FPYVTD |
| Micro SD Card - 32gb | $10.33 | Amazon.com B06XWMQ81P |
| Camera Cable for Pi Zero | $5.99 | Amazon.com B07T8TLCFZ |
| Camera Wide Angle 175°, IR Cut Filter, IR Illuminators | $18.67 | Amazon.com B07ZCRL346 |
| Motor and Power Board | $16.85 | Amazon.com B07K7NP7C9 |
For Pan Tilt Camera |
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| SG90 Servo Qty 4 | $9.99 | Amazon.com B07MLR1498 |
Battery - Optional! Tank Chassis supports 4x AA batteries |
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| Lipo Battery 2S, 7.4v, 1000mah, 20C | $12.99 | Amazon.com B06Y2P8FGC |
| Lipo Battery Charger | $8.99 | Amazon.com B071ZMT2ML |
Raspberry Pi Onboard PCA9685 TB6612FNG Drive Two DC Motors I2C Interface 5V 3A
From the example code we can find the PWM channels used for the H bridge. This can be confirmed by the scmeatic(pdf).
//Motor A self.PWMA = 0 self.AIN1 = 1 self.AIN2 = 2 //Motor B self.PWMB = 5 self.BIN1 = 3 self.BIN2 = 4
If we want to add Pan and Tilt camera controls and a Grabber Claw&tm; we need more channels for servos
The schematic(pdf) shows pins 12, 13 and 15-21 are not used. That is 9 PWM channels available!
Unfortunately the pca9685 pins are not broken out on this board. Careful soldering lets you utilize them!
2019-10-21 Published
2019-10-23 Add Servo wires