THIS PROJECT IS CLOSED AND PARTS IN MY BOXES Problem solved: Okay so my problem was that motors didn't get enough power. I tested this with 6v and it worked. Okay,so here's my third BEAM-robot. But it just don't want to work! I got one picture from very close: [image] Parts i…

**It looks like your ** It looks like your transistors/LDRs are wired wrong. The LDRs should have one end to V+, the other end to the transistor base. You should also attach a diode across the motor leads (or any other inductive load) to keep from zapping the 3904.

The LDRs are connected The LDRs are connected between base and collector now… that isn’t right. they have to be at the middle pin of the transistor and the + which I assume is the most top red wire between the 2 motors in the picture. * I think the mistake is made by connecting …

It was noted his V+ was It was noted his V+ was actually coming out of the bottom wire as seen in the picture. I pointed out that was backwards, so hopefully that is amended as well.

Ah… ok. I didnt see the Ah… ok. I didnt see the shoutbox until now. Botfin should change this indeed. @ Botfin:I do not want to complicate things, if so then ignore this following: Maybe handy to know that a diode (also the one inside a transistor) in the schematic looks like a…

cheers! i have nothing to do to fix this, can’t clearly see or understand the circuit of this robot. but hope that this woll be fixed!

none of this makes sense to none of this makes sense to me. mogul in your diagram what is the diode doing? cuz it looks like a short to me. + coming out of the motor going back to vcc? also why is the motor before the transistor? that seems wrong to me. (edit: i looked it up and…

As fas as I know to switch a As fas as I know to switch a dc motor it’s better to make an emmiter-follower, however I can’t remember exactly why… lets stick us to the original circuit. about the diode: it will only cause short circuit if placed in the wrong direction. Imagine: t…

Awesome Use photo resistors instead of the sensors your using now.

Their both the same thing! LDRs = Photoresistors

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botfin November 27, 2011, 3:21am 6

Trying…
I try to fix this today, unless i don’t have diodes ;(