HT301 3 Button Combination Lock / Electronics Kit

Item ID : 184217111
HT301 3 Button Combination Lock / Electronics Kit
Sale Price : RM 20.67
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 : 1196

HT301 3 Button Combination Lock / Electronics Kit


HT-301 is a simple electronics combination lock kit which can be used as a security devices. The Relay will only respond to the correct sequence of 3 numbers keyed in on the keypad. Touching any other key will reset the lock. The key combination can be easily changed.


Product Features 

  • Input Voltage: 9V DC
  • 3 numbers code lock
  • Reverse polarity protection
  • Easy-To-Make
  • With Relay Output


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.
  • Choose 3 numbers to be the secret combination. The numbers must be different. Example: 321.  User need to touch 3 then 2 then 1 on kepad to activate the Relay. Touching any other number will reset the unit.
  • On the Main PCB, connect "SWA" to a pad of 3 using some of the multicore wire provided. Connect "SWB" to a pad of 2 and "SWC" to a pad of 1. Now connect the "RST" to the six remaining numbers and common (4, 5, 6, 7, 8, 9 and C).   


Test & Adjustment

  • After assembled, please check & ensure the value & polarity for all components were inserted into PCB correctly, wrong polarity connection of capacitors can caused explosion of failure.
  • 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, the combination lock is now ready.
  • When the right sequence of three numbers keyed in on the keypad, the relay will be activated to turn on the external device (example Buzzer / Siren). Press any other key will reset the lock. 



  • 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 @ 8/18/2016 3:00:56 PM

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HT301 3 Button Combination Lock / Electronics Kit
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International: RM
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