Light / Dark Activated Switch With Hysteresis Light / Dark Activated Switch With Hysteresis Quasar Electronics This kit uses the LDR and built-in hysteresis of the 741 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 > Printed Circuit Boards > Development Boards quasar_diy_k79b 3079BKT View Offer Quasar Electronics Limited
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Light / Dark Activated Switch With Hysteresis

Light / Dark Activated Switch With Hysteresis
Light / Dark Activated Switch With Hysteresis
Light / Dark Activated Switch With Hysteresis
Light / Dark Activated Switch With Hysteresis
AS3079B - Light / Dark Activated Switch With Hysteresis
Ability Level 2: ModerateProduct Formats Available : Pre-Assembled Module (AS)

Discontinued - Replaced by Order Code 3079Bv3

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.

  • Adjustable turn-on sensitivity
  • Switch to select either 'light' or 'dark' activation
  • LED status indicator
Specifications
Supply VoltageRegulated 10 - 15Vdc
Current consumptionLight Activated: <1.5mA standby, <46mA relay active
Dark Activated: <2mA standby, <45mA relay active
Suitable
Power Supplies

- 660.446UK (with connector 778.106 or 777.001)
- CFE103

Output Type1 x SPDT Relay
Maximum Output
Load (Resistive)
Up to 48Vac or 28Vdc @ 2 Amps max.(Relay Datasheet)
Output ConnectionsNO, NC, C (Relay FAQ)
Board Dimensions~ 37 x 61 x 20mm
Fixing Holes4 x M3
EnclosureWCAH2855
Board ConnectionsScrew terminal blocks
Product FormatsPRE-ASSEMBLED Electronic Module (AS) Product Formats Info
DocumentationUser Manual

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