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.
|Supply Voltage||Regulated 10 - 15Vdc|
|Output||1 x SPDT Relay|
|Up to 48Vac or 28Vdc @ 2 Amps max. (Relay Datasheet)|
|Output Connections||NO, NC, C (Relay FAQ)|
|Board Dimensions||33 x 53 x 20mm|
|Fixing Holes||4 x M3|
|Board Connections||Screw terminal blocks|
|Product Format||SELF-ASSEMBLY Electronic Kit (KT) or|
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info