# The Capacitor Powered Car

The idea of our project was to build a small capacitor powered car that would be charged by solar panels and designed to go as far as possible on one charge.
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## Step 1: Step 1: Motors and Capacitors

The first thing we had to do was figure out the power of our motor we were given, which was a small erector set motor. We found the torque constant was 6.5 oz inches/amp, and the voltage constant was 1833 volts/rpm, and it had an operating voltage of 3-6 V. We also figured out the amount of power in our capacitor, which was a 5 V, 1 Farad capacitor. Link to the capacitor on Digikey HERE.

## Step 2: Step 2: Drive Train and Wheels

We then decided on an ideal gear ratio and wheel diameter, which was about 5:1 and about 1.5 inch diameter drive wheels, which was determined by using the Team Tentacle Torque Calculator. we used a 57-tooth gear and an 11-tooth gear, giving us a ratio of about 5.2:1.

## Step 3: Step 3: The Chassis

After finding all the information needed on the car, we started building our chassis on solidworks.  At first, the car chassis was a basic rectangular shape. We changed it over time while making it stronger and lighter. Our final design ended up looking like a regular car chassis. Also we designed a section on the car that allows the motor to move to different positions to distribute the weight and this would allow us to adjust the motor to get the correct center to center distance between the gears. We made our chassis using a 3D printer, using about 1 cubic inch of material. If you download this chassis, make sure to adjust the axle holes to your specific axle size, and allow tolerances for your specific 3D printer.

## Step 4: Step 4: Axles

We used axles that were 3.7 inches long, since the chassis is 3 inches wide, and 0.16 inches in diameter, because they were the axles that fit the gears we had.
terrible tinkerer7 months ago

Aaaaaaah, Forgive me. Line one you state the capacitor is charged by solar panel! Would you be so kind as to elaborate? I'm interested to see how the 1F cap is charged & how long it takes to charge. I luv the simplicity of your project. Well done!

terrible tinkerer8 months ago

& the 1F cap is charged how?