Quasar ElectronicsAS3079BKT - Light / Dark Activated Switch With Hysterisishttp://www.quasarelectronics.co.uk/media/ecom/prodsm/3079b_small.jpgThis kit uses the LDR and built-in hysterisis of the LM741 op-amp IC circuitry to allow the switch to operate with small and gradual light changes without the problem of relay chatter at the trigger threshold.Electronics > Circuit Components > Circuit Prototyping > Development Boardsid3079bkt3079BKT9.95Quasar Electronics Limitednewin stockhttp://www.quasarelectronics.co.uk/Item/3079b-light-dark-activated-switch-with-hysteresis
This board uses an LDR and built-in hysterisis of the LM741 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.
Adjustable turn-on sensitivity
Switch to select either 'light' or 'dark' activation