I have an HK-T6A v2 transmitter and receiver pair. I've had them for a while and just re-did m RC lawnmower and now the receiver does not appear to output any signals to the sabertooth 2x25 motor controller.
I have the receiver powered by the 5V out of an Arduino Uno r3 (via prototype shield). It's getting 4.98 volts.
The PPM output goes to pin 8 on the arduino (via the shield). Channel 1 and 2 go to the sabertooth motor controller.
I found that I had to connect the ground of the sabertooth to the ground on the receiver as well, otherwise the arduino, receiver, and sabertooth would seriously freak out.
The arduino is powered by a no-name chinese power supply board putting out 9 volts. The sabertooth is powered by the main 24V. It's main power is fed through a cheap 24V relay from china. The relay is activated by a switch that controls a total of 2 relays. It's also currently switching the brakes on the wheelchair motors too. That's just a temporary fix till I have a chance to edit the code on the arduino.
Last season I have the receiver powered by the sabertooth and there was a switch to turn everything on. All the stuff I described is new. About 30 - 45 minutes into mowing today, the mower just stopped moving. After some troubleshooting, it seems the receiver is not outputting any channel information, though it is still linking to the transmitter and also putting out something on the PPM out.
Is there anything I can do to try to fix it?
Are there any boneheaded mistakes I made?
I don't mind replacing the receiver, but I am worried about a design flaw that will fry the next receiver.
You can see it better here: