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The Hydrobot is a really aesthetic robot. My mom add a nice looking bottle of Biotherm. When the bottle was empty I use it to build a other robot, the Hrydrobot was born.
The Hrydrobot use a FLED solarengine with .33 Farad capacitor.
It sit on the surface of the water for a 1 minute and when it trigger it go staight like a arrow for tabout 4 second. After the first run the Hrydrobot will trigger faster about every 50 seconds.

**Click here how to water proof a motor.**

Circuit :
1- solarcell
1- 2N3904 transistor
1- 2N3906 transistor
1-  green FLED
1- 2.2 k resistor
1- motor from solarbotics the Mabuchi FF-030-PN
1- .33 Farad Panasonic AL Gold capacitor from solarbotics

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Chassis :
1- BIOTHERM plastic bottle
1- water proof motor from solarbotics the Mabuchi FF-030-PN
1- solarcell SC3733
1- weight
1- propeller

**Click here how to water proof a motor.**


Here are some advantage and disavantage and some improvement for this robot.

Avantage :
   fast
   Compact design
   Robust

Disavantage :
   slow to charge
   the wave affect the direction of the robot

Future improvement :
   Better rudder
   photovore light seeking hydrobot with a 125ml (4.2oz) bottle








©2001 Jérôme Demers. All rights reserved.