HT-302 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 4 numbers keyed in on the keypad. Touching any other key will reset the lock. The key combination can be easily changed.
Input Voltage: 9V DC
4 numbers code lock
Reverse polarity protection
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.
Choose 4 numbers to be the secret combination. The numbers must be different. Example: 4321. User need to touch 4 then 3 then 2 then 1 on keypad to activate the Relay. Touching any other number will reset the unit.
On the Main PCB, connect "SWA" to a pad of 4 using some of the multicore wire provided. (Ex."SWA(t) to a pad of 4(t) while "SWA(b) to a pad of 4(b)). Next, connect "SWB" to a pad of 3, "SWC" to a pad of 2 and "SWD" to a pad of 1. Now connect the "RST" to the five remaining numbers(5, 6, 7, 8, 9).
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 four 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 firstname.lastname@example.org 07-3344473
Last Updated @ 9/23/2016 3:23:25 PM
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