Key Chain Camera Car
With TMCC controlled Servo Pan Head
Click on images for larger view.
|This Key Chain Spy Camera can record 720x480 30fps movies on a 4gb
memory card. That's about 40 minutes worth of video. Pretty amazing
quality for it's size and price of under $25.
I decided it needed to have a Pan function to be more versatile and get more interesting shots.
It also needed a smooth, quiet and stable platform.
|The car uses a heavy diecast dropcenter flat car for it's base. I replaced the original trucks with smooth running American Models tender trucks. These also have the electrical pickup required for the ERR MiniCommander TMCC receiver. The Mini has the engine firmware. The Pan head servo is a modified Futaba RC airplane servo that can run a continuous 360 degrees. The electronics are removed and motor stop removed. The motor is driven by the HC1 and HC-2 outputs of the MiniCommander using diodes for direction control. The servo can Pan very slowly if needed controlled by the CAB-1 throttle knob and direction control. I used red and green tally lights to show the direction of the Pan. They are hooked up to the LC-1 and LC-2 outputs. Since there is no viewfinder function you have to aim the camera by dead reckoning guesstimation.|
|The pan head has a quick release cradle made from
aluminum sheet stock with a tilt adjustment built
into the lock knob. The nut controls the height and the knob is the
Just unscrew the locking knob and the camera slips out for downloading and charging.
It has DC filter Capacitors for the servo motor to
help keep the buzzing out of the on board microphone.
To help the servo run smooth at the slower speeds
run the track voltage down to 12-14 volts. Also use the 100 step