Relay module 1-channel 5V 10A - Universal module with a 5V relay with optoelectronic isolation...HobbyStore
Ultrasonic sensor HC-SR04 - universal ultrasonic sensor for distances operating in the range of 2 - 400 cm. It is used to measure the distance from an obstacle, it allows to build alarm systems, robots, models, etc.
- Voltage: DC5V 2: quiescent current: <2mA
- Output level: high-5V output 4: level: end 0V
- Induction angle: no more than 15 degrees: detection range: 2 cm-450 cm
- High precision: up to 0.3 cm
Panel cables, VCC, trig (control side), echo (receiving end), out (empty feet), GND.