1/5
Promoted
Lagos, Yaba
15 views
HC-SR04 Ultrasonic Sensor
Security & Surveillance Accessories
Type
Brand New
Condition
Other
Brand
Delivery
Lagos State
1 day
₦ 2,000 - 4,000
Store address
Lagos State • Yaba
No 4 Jibowu off Ikorodu road
HC-SR04 ultrasonic module can offer non-contact distance sensing function, the range of which is 2cm—400cm., and the range accuracy is up to 2mm; the module includes ultrasonic transmitter, receiver and control circuit.
The basic operation principle is below:
(1)use IO port TRIG to trigger ranging. It needs 10 us high level signal at least
(2)Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned.
(3)If there is signal returned, output one high level signal via IO port ECHO. The duration of the high level signal is the time from transmitter to receiving with the ultrasonic.
Testing distance =duration of high level*voice velocity(340m/s) / 2
2.Physical map
Refer to the wiring diagram below,
VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.
₦ 2,700
Negotiable
Safety tips
- Avoid paying in advance, even for delivery
- Meet with the seller at a safe public place
- Inspect the item and ensure it's exactly what you want
- Make sure that the packed item is the one you've inspected
- Only pay if you're satisfied