继电器(Relay) - 知乎 - 知乎专栏
电磁继电器（electromagnetic relay）是一种电子控制器件，它具有控制系统（输入回路）和被控制系统（输出回路），通常应用于自动控制电路中，它是用较小的电流、较低的电压去控制较大电流、较高的电压的一种开关控制方式，在电路中起着自动调节、安全保护 ...
Relay Boards Selection Guide: Types, Features, Applications
Relay boards are computer boards with an array of relays and switches. They have input and output terminals and are designed to control the voltage supply. Relay boards provide independently programmable, real-time control for each of several onboard relay channels.
Amazon.com: Relay Board
8 Channel Relay Module DC 5V Relay Board with OPTO-Isolated Support High or Low Level Trigger
Relay boards: Relay board for PIC, AVR, Arduino or Raspberry PI …
A general purpose 4 SPDT channel relay board (power supply 5VDC) for switching high-current electrical loads (both AC and DC) siuch as motors, lights, pumps, contactors and more. With this relay board, any logic-level signal from 3V up to 30V can be used to activate a relay (it may be controlled direclty by microcontroller TTL logic as well).
SainSmart 16-Channel 12V Relay Module Board for Arduino DSP …
2018年5月6日 · - 12V 16-Channel Relay interface board, and each one needs 15-20mA Driver Current. - Equipped with high-current relay, AC250V 10A ; DC30V 12A. - Standard interface that can be controlled directly by microcontroller.
What is a Relay Module & How Does It Work? (Types & Uses)
2022年11月14日 · A relay module is a relay that’s been mounted on a board with other components to provide isolation and protection. This makes them easier to use in a variety of applications. The use of relay module devices offers a simple and convenient way to control electrical equipment systems remotely.
Amazon.com: 24v Relay Board
4pcs DC 24V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level
继电器板 | e络盟 中国 - element14 Community
Grove 4-Channel SPDT Relay Board, Grove Cable, Acrylic Case, Nylon Nuts, Studs and Bolts
4-Channel 15A SPDT Relay Board: RLY204 - Winford
This relay board provides a convenient way to add relay outputs to your project, allowing you to switch high-current loads such as AC appliances, motors (up to 1/3 HP at 120V AC), and more. This board includes four SPDT relays, relay driver circuits, and protection diodes.
Mechanical Relay Board - Bravo Controls
The MRB Mechanical Relay Board is a handy way to mount multiple relays in a tidy package with either 4 or 8 relay models and field selectable coil voltage of 12VDC and 24VAC. There’s a status LED for each relay and a label with writable surface where you can mark the name of each output.