On 2023-03-18, at 09:00, ChrisBeee via groups.io <chrisbeee@...> wrote:
rather sounds like an LDR than a photocell to me.
Right. The problem is that there are no photocells in today’s equipment, so even googling for “photocell” gives you results for “photoresistor” (= LDR, Light-dependent resistor) [1].
Common LDRs use CdS (Cadmium Sulfide) as a material, so when you read “CDS photocell”, what is meant is a CdS LDR.
Wikipedia completely avoids the term “Photocell” in its articles about photodetectors [2], but redirects from “Photocell” to that. As a more precise term, they use “Phototube” [3].
(See why I sometimes like when people use the right terminology in the first place?)
Grü?e, Carsten
[1]: ,A%20photocell%20or%20photoresistor%20is%20a%20sensor%20that%20changes%20its,light%20will%20cause%20higher%20resistance.
[2]:
[3]:
