It’s not uncommon for video viewers to make suggestions to projects and since this entire project was based on viewer demand I’ve once again listened to some input. YouTube viewer Pete Prodoehl suggested that I use the DRV8835 Dual Motor Driver Carrier from Pololu instead of the motor driver shield that was using. I ordered one from Pololu and two days later it arrived in the mail. In this week’s video I removed the old motor driver and installed the new one which takes up less that half of the space the other one did. This makes more room on the perfboard so I decided to mount the battery in the available space.
Another suggestion from YouTube viewer cfavreau was to use a 5 mm LED as a low friction tail for this little tail dragger robot. I’ve since installed one.
Here’s a parts list for that parts I’ve used so far. They can be purchased from Pololu.
Prices are as of 5-2015
Item # Item Description Price US$
2356 14×4.5mm Wheel Pair for Sub-Micro Plastic Planetary Gearmotor 1.95
726 Maxbotix LV-MaxSonar-EZ1 Sonar Range Finder MB1010 24.95
1939 USB Cable A to Micro-B, 5 ft 2.49
965 0.100″ (2.54 mm) Breakaway Male Header: 1×40-Pin, Straight 0.99
2358 136:1 Sub-Micro Plastic Planetary Gearmotor 6Dx19L mm 11.95
3101 A-Star 32U4 Micro 12.75
2135 DRV8835 Dual Motor Driver Carrier 4.49
The 3 Volt coin cell batteries and the dual bettery holder are from SparkFun Electronics
The perfboard is from Radio Shack.
Here’s the wiring diagram:
This week’s video. Keep on hackin!