Quasar ElectronicsAS3079AKT - Basic Light / Dark Activated Switchhttp://www.quasarelectronics.co.uk/media/ecom/prodsm/3079a_small.jpgThis circuit uses a simple LDR based circuit in super-Darlington set-up to turn on the onboard relay.Electronics > Circuit Components > Circuit Prototyping > Development Boardsid3079akt3079AKT9.95Quasar Electronics Limitednewin stockhttp://www.quasarelectronics.co.uk/Item/3079a-basic-light-dark-activated-switch
This circuit uses a simple LDR based circuit in super-Darlington set-up to activate the onboard relay (see Relay FAQ for details).
Best suited to applications where the change in light level is large and the transition quick e.g. to activate a music box when the lid is opened.
The Light/Dark mode switch is used to select either light or dark activation of the relay. This enables the unit to be operated in its low-current standby mode for the majority of the time according to your application.
Adjustable turn-on sensitivity
Switch to select either 'light' or 'dark' activation