Here are some DIY LDR switch circuits available on our website and the web. LDR switches are used to switch a relay or other device when light are present or absent. LDRs or Light Dependent Resistors ...

Sine waves are beneficial for information interchange, e.g. they have very a short and predictable frequency spectrum. When needed, it is relatively easy to suppress the sine signals with filters. On ...

We were recently tipped off to quite a resource — on the Texas Instruments website, there’s a page where you can view and download a compendium of analog sub-circuits. Individual circuits can be ...