Normally, a USB simulator adapter plugs in to a 3.5mm jack on the transmitter used for a ‘buddy box’, but [sjtrny] had an extra receiver sitting around. Since a receiver simply outputs signals ...

RC receivers are 5 VDC and draw very little current, so it’s even possible to power the whole arrangement from the USB port. On the software side, the Arduino sketch does about what you expect.

After construction, power up the circuit from the concerned RC channel (e.g. channel 5) of the receiver, turn on your transmitter, and verify that moving the R/C stick (or an auxillary toggle switch ) ...