HT317A Light Detector (Dark ON) / Electronics Kit

Item ID : 184217096
HT317A Light Detector (Dark ON) / Electronics Kit
Sale Price : RM 12.72
Price includes GST (6%)
Shipping (*Exclude GST) :
Peninsular :RM7Sabah, Labuan:RM10Sarawak:RM9
Option :
Ship To : Within Malaysia, ship by Courier Services, Self Collect
Item at : Johor Bahru / Johor
Views : 1702

HT317A Light Detector (Dark ON) / Electronics Kit


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.

Product Features

  • Input Voltage: 9-12VDC
  • Dark On
  • Sensitivity is Adjustable
  • LED Indicator for Relay On 
  • With Relay Output
  • Easy-To-Make


Assembly Instructions

  • 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 through or 07-3344473


Last Updated @ 11/17/2015 3:51:06 PM

Buy with confidence, we have 251 Good Ratings from buyers!
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Buyer: mt****   (28: 21+,100%)  |  Date: 23/10/2016 22:25  | Item ID:169181379
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Q&A (2)
zamribodi ask: (2015/4/9 00:21)  

i already send the component lists to, but no respons. i need that component ASAP for my project.

hitectrons reply: (2015/4/9 09:46)  
hi, the email address is incorrect, please resend to

zamribodi ask: (2015/4/1 11:24)  
in this order i also want to buy others component such as IC, if can how. Thanks
hitectrons reply: (2015/4/1 15:37)  

You can send the component lists to, we will advice the pricing as soon as we can.


HT317A Light Detector (Dark ON) / Electronics Kit
RM 12.72 Shipping fee (*Exclude GST):Peninsular: RM 7, Sabah/Labuan: RM 10, Sarawak: RM 9,
International: RM
Combine Shipping allowed

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