When testing make sure the position of the LED is not very close to the photo-cell. When it is dark the photo-cell wants to turn on the LED, but if some of the light from the LED shines onto the photo-cell it may be hard to get it to function properly.
On the breadboard the Red and Black posts are connected to a 9 Volt battery snap leads. This is jumpered onto the power rails of the breadboard. In this case negative is the upper rail and positive is the lower one.
Top view of the circuit, when looking at the transistor from this view the pins from left to right are, Emitter, Base, Collector. This relates to E, B and C on the schematic diagram.
[…] September 22, 2009 · Leave a Comment Hello and greetings fellow bloggers and gamers. Tonight I’ll be posting a DYI Project on how to build a sensor sensative Gamer’s Light to spark up that avid gamer’s bedroom or apt. Here is the Video with a walk thru with commentary and all. Thank Hackedgadjets for this project please and show your support […]
First off, I want to thank Alan for an awesome DIY project. This can also be done with anything, from empty juice bottles to wine or rum bottles. Now on to my suggestion.
“It is best to place it on something that is white or at least a light color. The LED is pointing straight down and a good reflective surface helps. I am thinking of cutting a small round white disc of cardboard and gluing it to the bottom.”
And a good thing could be a cd or dvd disc. I have a ton of those hanging around my closet because i refuse to throw them shiny things away. They are reflective enough to bounce off light very nicely. An empty cd or dvd case can also be a worthy container for your led lamp design. I loved the photocell usage. Had not seen one like this ever.
I am also relatively new to these things, could you comment on the transistor usage? What is it for!? My electronics course pretty much covered resistances, and how to combine them to get higher or lower ohms from them, but I never learned about these other parts.