Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: callinyouin on July 25, 2010, 04:49:56 PM

Title: $50 Robot Photoresistors
Post by: callinyouin on July 25, 2010, 04:49:56 PM
Hello,
I'm a complete beginner when it comes to working with electronics, but wanted to work through the $50 Robot tutorial so I would have something fairly simple to use as a learning tool, mostly for the programming side of things.
Now that I'm reading the photoresistor tutorial, I'm a bit unclear as to how to wire these things up. Specifically, the part where it says "You will also want to solder a blue (or whatever color) wire to the other wire coming out." is completely confusing. I'm not sure if this is supposed to be on the power or the ground/resistor side, or how this would work in either case.
Could someone please set this confused guy straight?? ???
Title: Re: $50 Robot Photoresistors
Post by: Choco_liger on July 25, 2010, 05:22:49 PM
On your two leads of your photo resistor, one lead will be positive(red), while the other will have ground and the input for the IC.

So just solder a resistor just below the photocell and with the two leads sticking out, heatshrink them both.

EDIT: Picture for better sense...
Title: Re: $50 Robot Photoresistors
Post by: billhowl on July 25, 2010, 06:16:22 PM
(http://www.societyofrobots.com/images/schematics_photoinc.jpg)
The Vin is Red wire
Ground is Black wire
The Vout is Blue wire
(http://www.societyofrobots.com/images/sbs_photoresistor2.JPG)
Quote
"You will also want to solder a blue (or whatever color) wire to the other wire coming out."
Is the other wire of the photoresistor that solder to resistor (Vout).
Title: Re: $50 Robot Photoresistors
Post by: callinyouin on July 26, 2010, 07:00:52 PM
Wow, thanks both of you. It makes perfect sense now, especially thanks to the picture.