# Monthly archives: February 2013

## “powering” and arduino off a DC motor

The motor I was using is does not put out a lot of voltage so I had to back it up with a lot of capacitors. When there was no load on the circuit, I could charge all the caps up and get a steady flow of 5.2 volts. Once I hooked the arduio up with the LED blink sketch, it was only getting 2.5 to 3.5 volts after the load… so the arduino couldn’t stay on for more than a few micro seconds. :|

## 555Timer Circuit

Basic Analog Circuit

http://www.erosenthal.com/NYUITP/Session_4.html

## Pendulum calculations

Total energy stored = 2.71 Joules

Average power over 2 minutes = 0.02 watts

If all potential energy was used in 10 seconds, average power = 0.27 watts

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## DC Power

Measured Open Circuit Voltage (V) = 4.4V

Measured Short Circuit Current (mA) = >200mA

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## Pendulum

Pendulum Trio: David Rios, Anne-Marie Lavigne and myself. The measurements for our shaky pendulum can be found below.

Ideas and sketches we came up with for devices that could be powered by our pendulum:

Soup stirrer || potato/grape masher

This device uses our pendulum to drive a fulcrum and lever system.  The pendulum is on one end of the lever.  The other end will have our spoon or masher attached.

ACME rocket/firework launcher

Have a match or maybe a bunch of matches attached to the swinging end of the pendulum.  The matches would hit a hard rough spot at the bottom of the pendulum swing causing them to ignite and light the fuse of the projectile. Then… KABOOM.

Pendulum powered camera

Using the same lever system as the first idea, the pendulum operates the shutter and the film advance of a manual film camera.

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