View Full Version : Photovore motor driving help needed

10-11-2007, 07:51 PM
I recently made a light follower it worked well on the breadboard(ie the TIP122 was easily driving the motors) but when i put it up on the chassis and soldered everything in place the motors dont turn on flicking the switch on i.e. if the switch is already on and then i join the connection for motor it runs but when i connect the motor terminals and then switch it on the motors wont run!Seems the motors arent gettin sum sorta pickup? wat is the solution?? all i can think of is using another TIP122 in series with those in place.Thanks already!!

10-11-2007, 08:05 PM
post your schematic!!

10-12-2007, 09:02 AM
Are you using the LS240 ?

10-16-2007, 11:36 PM
basically one pin of the LDR is connected to the 5V line and another to the Base of the TIP122 and the Collector of the TIP is connected to the 15V supply and the motor is connected across the line going from the Emitter to the GND
I couldnt find a way to attach a picture of this schematic thats why i had to write it down.Anyways please help quickly guys

10-17-2007, 09:22 AM
From the way you described your circuit, it wont work, due to absence of resistors @ important nodes!!!