Awesomeness! Arduino R/C Lawnmower
Check the full tutorial here:
http://goo.gl/olRf4S
I added some new code to the project that is safer, including a manual kill-switch and a Failsafe switch.
To implement the Failsafe, I used another Atmega168 (or an Arduino), to control a normally-open 60amp power relay. The relay disconnects the power to the motor-controller unless receiving a “good” signal from the 2nd microcontroller. This signal is updated 2 times every second and is either ON or OFF. If the bot gets out of range, it loses power to the motors. If I flip the kill-switch on the Transmitter, it loses power to the motors. This is also a handy way to disable it remotely if anything were to go near it that wasn’t supposed to. The updated code for both microcontrollers is on the CODE page.
, https://i.ytimg.com/vi/FGgEbIfbKh8/hqdefault.jpg
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