Put your R/C car under computer control

Step 6 Build some more stuff

So, now you want to build the circuit from the schematic below. The transistors at the bottom are the ones you just soldered onto the transmitter. And oh yeah--THIS IS IMPORTANT! Don't forget to put your microcontroller in an IC socket. Otherwise you'll be very sad when you want to program it. For now, don't worry about where the VCC for your 7805 is coming from (this will be the 9V we use to power the transmitter).
Feel free to put on a power LED, too. Doing that always gives me a warm feeling inside