Let's Make Robots!


photocell with motor, no programming

Hi, im new to the forums and I need some help running a dc motor with a photocell without any micro-controllers.

Heres the list of parts I have:

-Tip120 transistor

-1n4004 diode

-1k resistor


-solderless breadboard

-jumper wires

-9volt batter with battery connector thing

-a small dc motor (i dont have much information about it except that it seems to run on 3.3volts:( )

Uses the servos potentiometer to detect resitance on a gripper.
Using a
I soldered a wire to the middle pin of the potentiometer inside the servo that operates my gripper. Using an analog pin, I can tell when the Servo isn't moving. I … Read more


So I was going to post a blog with a picture but I can but the picture was about my robot  SOLAR-1. It has a IR sensor, a Light sensor, 2 LEDs, Picaxe mircocontroller and that all of the major part of the robot. It will avoid object and when its in a dark place it will turn two a very bright blue LEDs located above the light sensor. Thats all for now cheack back next time for some updates