The reference to 37 sensors and modules has been widely circulated on the Internet. In fact, there must be more than 37 sensor modules compatible with Arduino. In view of the fact that I have accumulated some sensors and modules on hand, according to the concept of practice (hands-on try), for the purpose of learning and communication, I am going to do experiments one by one here, and will record them regardless of whether they are successful or not. It is a difficult problem, and I hope to be able to throw bricks and spark jade.
[Arduino] 168 kinds of sensor module series experiment (data + code + graphics + simulation)
Experiment 43: 5V low level trigger single relay module (single module normally closed and normally open type)
Single-channel 5V relay module
1. General-purpose single-channel 5V relay module
1. Module features
(1) Comply with international safety standards, and there is an isolation slot between the control area and the load area;
(2) Double-sided FR-4 circuit board design, high-end stickers (3) It has power supply and relay action indication, it
is bright when it is closed, and it is not bright when it is disconnected; (
4) It is divided into two specifications: low-level trigger and high-level trigger;
(5) The relay can directly control various Equipment and load;
(6) Control DC or AC signal, can control 220V AC load;
(7) There is a normally open and a normally closed contact;
(8) The signal input terminal has a low level (or high level) signal
(9) It is more convenient to connect the blue KF301 terminal to the control line; (
10) Module size: 43 17 18.5MM, net weight: 15g.
3. Single-channel 5V high and low level trigger optocoupler relay module (red board)
1. Module features——
(1) The module adopts genuine high-quality relays, and the maximum load of the normally open interface: AC 250V/10A, DC 30V/10A;
(2 ) SMD optocoupler isolation, strong drive capability, stable performance; trigger current 5mA;
(3) Module working voltage 5V;
(4) The module can be triggered by jumper setting high level or low level;
(5) Fault-tolerant design , even if the control line is broken, the relay will not act;
(6) Power indicator light (green), relay status indicator light (red);
(7) Interface design is user-friendly, all interfaces can be directly connected to the terminal Very convenient;
(8) There are 4 fixing bolt holes, the holes are 3.1mm.
2. Module electrical schematic diagram (for reference only)
3. Technical parameters -
relay quiescent current maximum current trigger current trigger voltage (low) high
5V 5mA 190mA 2-4mA 0-1.5V 2.5-5V
4. Module interface——
(1) Relay input terminal (low voltage):
(a) DC+: connect to the positive pole of the power supply (voltage according to the requirements of the relay)
(b) DC-: connect to the negative pole of the power supply
(c) IN: can be high or low Flat control relay pull-in
(2) Relay output terminal (high voltage):
(a) NO: Relay normally open interface, the relay is suspended before pull-in, shorted with COM after pull-in
(b) COM: Relay common interface
(c) NC: Relay normally closed interface, shorted with COM before the relay pulls in, and suspended after the pull-in
(3) High-low level trigger selection terminal:
(a) When the jumper is shorted with LOW, it is low-level trigger;
(b) Jump When the line is short-circuited with high, it is a high-level trigger.
5. Module instructions——
4. 1-way 5V low-level fuse solid state relay 250V2A module
1. Features:
(1) 5V solid state relay 240V 2A, output with resistive fuse 240V 2A
(2) Size: 25.2mm 34.4mm 24.0mm (length, width and height ) (3) Weight: 10.4g (net weight) (4) Packaging: Single module electrostatic bag packaging (5) Input power: 5V DC (<=160MA) (6) Trigger signal voltage: low level: 0-1.5V state low Level relay ON High level: 2.5-5V state High level relay OFF (7) It is more convenient to connect the blue KF301 terminal to the control line.
2. Module interface:
DC+: Connect to the positive pole of the power supply (power supply according to the relay voltage)
DC-: Connect to the negative
pole of the power supply CH: Signal trigger terminal of the relay module (low level trigger is valid)
