Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Scythiar on June 29, 2009, 07:45:30 PM

Title: Problem building $50 robot circuit
Post by: Scythiar on June 29, 2009, 07:45:30 PM: I built the $50 robot circuit unfortunately, it does not seem to function in any way, the
red LED never lights, nor can i program it, Here is the schematics of my robot circuit.

http://i991.photobucket.com/albums/af39/Scythiar/Drawing1.jpg (http://i991.photobucket.com/albums/af39/Scythiar/Drawing1.jpg)

Please look at it, and tell me if you see anything wrong.

Thx
Title: Re: Problem building $50 robot circuit
Post by: Conscripted on June 29, 2009, 09:29:49 PM: With just a quick glance I didn't see anything wrong with your drawing. Do you have access to a multimeter? If you do you should check to ensure that you don't have any unwanted solder connections. Pay special attention to ensure that power and ground never connect directly. Verify that you have power at your voltage regulator it's possible it's installed backwards.

Conscripted
Title: Re: Problem building $50 robot circuit
Post by: Scythiar on July 01, 2009, 06:58:34 PM: I looked at the circuit again, and i noticed that the linear regulator was not producing any power at all.

I then went through some mock tests, using the linear regulator, and i realize it only functions in certain
circuits. Anyone know how to properly get the linear regulator to function properly?
Title: Re: Problem building $50 robot circuit
Post by: Conscripted on July 01, 2009, 08:07:57 PM: Is it backwards? That is the only reason I can think of that it wouldn't regulate power if power was applied.

Conscripted
Title: Re: Problem building $50 robot circuit
Post by: jamort on July 01, 2009, 08:42:08 PM: could we have a picture of the actual circuit you built top and bottom?
Title: Re: Problem building $50 robot circuit
Post by: Scythiar on July 02, 2009, 02:34:44 PM: Sorry, no can do. I took the entire circuit apart.

I am testing all the pieces separately, and planning to reassemble them
soon.

If you have a breadboard, try testing out the linear regulator, maybe you
can find something that i'm missing.
Title: Re: Problem building $50 robot circuit
Post by: Webbot on July 03, 2009, 04:36:15 PM: http://www.societyofrobots.com/member_tutorials/node/190 (http://www.societyofrobots.com/member_tutorials/node/190)