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 |
Suitable Power Supplies | |
Output | 1 x SPDT Relay |
Maximum Output Load (Resistive) | 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 |
Documentation | User Manual |