HT-317A is a simple Light Detector (Dark On) which using an LDR (Light Dependent Resistor) to turn the devices on or off based on the amount of light that the circuit senses. Example: Turn on a light when it gets dark.
Input Voltage: 9-12VDC
Sensitivity is Adjustable
LED Indicator for Relay On
With Relay Output
Check off the components in the package against the component listing before assembly.
Start with the smallest components working up to the taller components, soldering any interconnection wires last.
Place and Solder the components into the board, make sure the components are in right position according to the overlay of PCB.
Test & Adjustment
After assembled, please check & ensure the value & polarity for all components were inserted into PCB correctly.
Next, ensure all these leads are soldered, no solder bridges between adjacent pads and no dry joint.
Once confirmed, connect the power source to the circuit board.
Adjust preset (P1) for the sensitivity if needed.
When in darkness or a low light level detected, the relay coil will be energized to enable the output. Also, the Red LED indicator on the PCB will turn on.
When high intensity of light detected, the relay coil will be de-energized to disable the output and the Red LED indicator will turn off.
Package includes schematic, printed circuit board and components
You need to have a soldering skill and basic knowledge of testing
For any inquiry or other technical problem, please contact us firstname.lastname@example.org 07-3344473
Last Updated @ 11/17/2015 3:51:06 PM
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