Is there an equivalent of Maplin (UK) in the US?

Hi, Steve. There aren't many manufacturers of CdS photocells left. Too bad, because they're pretty much indestructible, and although they're slow, they have a light response range similar to the human eye.

The most hobby-friendly component source in the States would be Mouser. They've got practically everything you could want, have no minimum order, and will even ship parcel post to save you a few bucks if you're willing to wait.

Mouser used to carry Xicor photocells up 'till last year, but I guess they discontinued them.

Another good source for hobbyists is Jameco. They do have a variety of generic CdS photocells with specified resistance ranges in stock.

I find you can usually get the things you need at very reasonable prices from one of these two sources. And both of them will send you a free catalog if you sign up on their website.

Also, if you're desparate, I hear Maplin does accept orders from this side of the pond, if you use a credit card and are willing to wait. You have to call them direct at 00448704296000 to place an order.

Radio Shack photocells do go all over the place -- no two alike, for sure. However, they all work after a fashion, and are usually good enough for "proof of concept" if you measure and tweak for each one. If you do get one of their grab bags, inspect for lead breakage before buying and be careful with the component leads during handling.

Good luck Chris

Thanks - Jameco looks like they can help

Steve

Also try

Sorry that should be

They are at the bottom of this page in the Digi-Key catalog:

Mark