How to adjust the photocell

How do I change the baud rate of a photocell?

After uploading, open your serial monitor, and set the baud rate to 9600 bps. Then trigger some changes in light; cover the photocell with your hand, turn your lights off, or shine a flashlight on the cell. You should see the voltage and resistance calculations vary with the light.

How do you adjust the sensitivity of a photocell?

Tape I know intermatic photocells , come with a metal shade that you can slide over the eye to adjust the sensitivity . I also installed one once that had 3 different shaded tinted lenses that would thread on to the end of the eye . The type with the metal shade is the surface mount style that mounts to a weatherproof bell box .

How do you use a photocell?

Photocells are pretty hardy, you can easily solder to them, clip the leads, plug them into breadboards, use alligator clips, etc. The only care you should take is to avoid bending the leads right at the epoxied sensor, as they could break off if flexed too often. Noisemaker that changes frequency based on light level.

Are photocells sensitive to light?

Photocells, particularly the common CdS cells that you're likely to find, are not sensitive to all light. In particular they tend to be sensitive to light between 700nm (red) and 500nm (green) light. Basically, blue light wont be nearly as effective at triggering the sensor as green/yellow light! What the heck is lux?

What is a photocell sensor?

A Photocell is basically a resistor that changes its resistive value (in ohms) depending on how much light is shining onto the squiggly face. They are very low cost, easy to get in many sizes and specifications, but are very inaccurate. Each photocell sensor will act a little differently than the other, even if they are from the same batch.

What is the size of a photocell?

Size: Round, 5mm (0.2") diameter. (Other photocells can get up to 11mm/0.4" diameter!) Sensitivity range: CdS cells respond to light between 400nm (violet) and 600nm (orange) wavelengths, peaking at about 520nm (green). As we've said, a photocell's resistance changes as the face is exposed to more light.