This product is obsolete/discontinued and no further stocks are available. Please see alternatives in the category links above.
Each circuit is a simple well tried design. One uses two transistors in a super-Darlington set-up. The second uses the LM741 op-amp, and the third uses a Schmidt trigger design.
Each board has a PCB-mounted switch to convert the circuit from light to dark switching and vice versa. All board have an SPDT relay output rated to switch resistive loads of up to 2 Amps @ 48Vac or 28Vdc max.Specifications
|Supply||Regulated 12Vdc (Order Code 660.446UK with connector 778.106)|
|Output||1 x SPDT Relay|
|Up to 48Vac or 28Vdc @ 2 Amps max. (Relay Datasheet)|
|Output Connections||NO, NC, C (Relay FAQ)|
|Board Connections||Screw terminal blocks|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) Product Formats Info|
|Documentation||3079A User Manual|
3079B User Manual
3079C User Manual
High quality Erp Compliant energy efficient fixed 12V regulated 1000mA max...
2.1mm x 5.5mm female DC power socket with screw terminals for easy cable connection. Ideal for connection to electronic kits, LED tape installations, CCTV and Guitar effect pedals...
Multipurpose black ABS plastic enclosure approx. 83 x 54 x 30mm that can be used to house a number of suitable size kits and modules...
New improved version dusk dawn sensor switch with 5 Amp mains rated relay. Light/Dark activation switch. Adjustable trigger sensitivity. LDR and 741 op-amp IC circuitry. Can operate with fast or gradual light change....
This circuit uses a simple LDR based circuit in super-Darlington set-up to turn on the relay output. A Light/Dark mode switch is used to select either light or dark activation of the relay...
This kit uses the LDR and Schmitt trigger circuitry to eliminate the problem of relay chatter at the trigger threshold so that the circuit can be used where the change in light with be small and gradual...