In similar manners to how lots of optical mouse sensors are Agilent command compatible, many RC cars are built on clones of Realtek TX2/RX2 chipsets. Ironically

In similar manners to how lots of optical mouse sensors are Agilent command compatible, many RC cars are built on clones of Realtek TX2/RX2 chipsets. Ironically designed originally by the same company as the RTL2832U. The RX2 protocol is incredibly simplistic and inefficient at the same time, something like numbers of pulses in increments of few dozens to accept one of the grand total of dozen commands. It barely allow multiple command issuance within a second and completely incapable of handling analog inputs due to that. It's truly a product of "if it works" mindset. They take the radio input, or just digital input into the antenna pin, or photodiode for IR input, or you can just remove the chip and solder an Arduino into H bridges. The difficulties are about the same. The minor disappointment I have had with these is that the steering servo built into the chassis inthe example I had was way too roughly made that analog control was plain impossible no matter what.