The HT335 is a Ultrasonic Motion Detector which can be used to turn the device on or off when moving object or human bodies was detected. Ideally designed for security alarm system, proximity switch, visitor chime, etc.
Example: When a burglar enter the detection zone, the reflected waves changes it's frequency slightly. This change of frequency cause the circuit to activated the relay for a few seconds.
Input Voltage: 9-12VDC
Maximum Distance: 12 Feet
Used a pair of 40Khz Ultrasonic Transducer
Sensitivity is adjustable
Reverse Polarity Protection
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
The transduces are mounted off board via 2 pairs of header,
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.
If all goes well, this kit starts function as following:
When any object is found moving in front of the transducers, the relay coil will be energized to enable the output and the Red LED indicator on the PCB will turn on for a few seconds.
This will repeat continuously until the object stops moving.
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 email@example.com 07-3344473
Last Updated @ 1/27/2016 2:35:26 PM
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