This board uses an LDR and built-in hysteresis of the 741 op-amp IC circuitry to eliminate the problem of relay chatter at the trigger threshold. This allows the switch to operate effectively where there is a gradual light change (i.e. dawn and dusk).
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|
|Current consumption||Light Activated: <1.5mA standby, <46mA relay active|
Dark Activated: <2mA standby, <45mA relay active
|Output Type||1 x SPDT Relay|
|Up to 48Vac or 28Vdc @ 2 Amps max.(Relay Datasheet)|
|Output Connections||NO, NC, C (Relay FAQ)|
|Board Dimensions||~ 37 x 61 x 20mm|
|Fixing Holes||4 x M3|
|Board Connections||Screw terminal blocks|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) or|
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info