Best Delay Relay Board

GeeekPi Raspberry Pi Expansion Board 4 Channel Relay Board Module Power Relay Module for Raspberry Pi 4B & Raspberry Pi 3 Model B+ & Raspberry Pi 3/2 Model B (No Programming Required/Programmable)

  • Supports Raspberry Pi 3A+/B+/2B/3B/3B+/4B/Pi Zero/Pi Zero W, Arduino UNO R3 / MEGA 2560 / STM32/ESP32/ESP8266.
  • The Relay Board gives your Raspberry Pi board the ability to control high voltage/high current devices, and easily makes normal home appliances become intelligent. Can be accessed programmatically or directly by shell.
  • Up to 4 layers can be stacked.The 4 Channel Relay uses high-quality relay modules combined with the most popular microcontroller technology to communicate with the Raspberry Pi..
  • You can use mulitiple relay modules stacked together to add many channels.
  • The 4 Channel module is very fast, easy to install, and supports multi-language development, making it ideal for smart home projects..
Check Stock

SainSmart 8-Channel Relay Module

  • 5V 8-Channel Relay interface board, and each one needs 15-20mA Driver Current.
  • Equipped with high-current relay, AC250V 10A.
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP432, TTL logic).
  • Indication LED's for Relay output status.
Check Stock

BTECH Mini UV-25X4 25 Watt Tri-Band Base, Mobile Radio: VHF, 1.25M, UHF Amateur (Ham)

  • What Makes the UV-25X4 Unique: Dual Synchronize Display Mode, Mic Audio Gain Settings, In depth user's guide, Auto Power Off Function, Channel Mode Editing Settings, Auto Scan, Scanning Resume, and Variable Frequency Scanning, Quad Watch Delay Time, Randomization Privacy Mode, Builds upon previous generation UV-2501+220.
  • Frequency Range: 144-148MHz (VHF), 222-225MHz (1.25M), 420-450MHz (UHF).
  • Broad (Wide) / Narrowband (Narrow) Selectable.
  • Recommended Accessories: Pair UV-25X4 with the Nagoya TB-320A Antenna (and RB-50 Magnetic Mount) for easy installation. The PC04 FTDI Cable is recommended for easy computer programming.
  • Dual Watch monitoring VHF/UHF and 220Mhz: The 220 MHz band antenna lowpass filter is switched with a relay and the 2 meter lowpass filter and 70 cm highpass filters are switched with PIN diodes - resulting in a audible relay switch noise when monitoring 220MHz with VHF/UHF simultaneously. A relay that completely isolated the 220 MHz RF filter won't impact the RF performance of the 2 meter/70 cm bands. If monitoring multiple 220MHz or VHF/UHF simultaneously the relay is not heard or used..
  • Tribander Mobile Radio Kit Includes: BTECH UV-25X4, Speaker Mic, 6 foot DC Cable with Cigarette Plug Connector, Ra....
Check Stock

CARLO GAVAZZI DAA01CM24 TIME DELAY, W/Timing Adjustment KNOB, Input / 240VAC/DC, SPDT, Range / 0.1SECOND to 100HOUR, Relay

  • Product Name:small time relay/delay device.
  • Control mode:H3Y-4 4 groups of delayed contacts.
  • Contact voltage:DC12V DC24V AC110V AC220V.
Check Stock

Taidda USB Relay Module, Sturdy Durable Lightweight Lcus1 USB Relay Module Intelligent USB Switch Control Module Onboard Ch340 Control Chip

  • Onboard high performance microcontroller chip.
  • Module with overcurrent protection and relay diode freewheel protection.
  • On-board 5V, 10A/250VAC, 10A/30VDC relay, long life of relay can be continuously sucked 100,000 times.
Check Stock

Adafruit Gemma v2- Miniature Wearable Arduino-Like Electronic Platform

  • Turn on and off lamps, fans, solenoids, and other small appliances(up to 250VAC or DC power) using any Feather board.
  • Compared to Adafruit's smaller Relay FeatherWings, this can handle a beefy 1200 Watts.
  • Works with all/any of our Feather boards, just wire up the relay control pin to whatever GPIO you like.
  • Connect a FeatherWing on top of your Feather board with Feather Stacking Headers or Feather Female Headers.
Check Stock

Innovited HID Replacement Bi Xenon Relay Wiring Harness Hi Lo - H4 9003 HB2

  • [High quality chip]:This product adopts imported high-performance USB control chip..
  • [Stable connection]:This board is designed with square type-b USB interface which assures the stable connection..
  • [Stable performance]:The high quality relay and dedicated relay driven ULN2803 chip ensure relay to work more stably..
  • [Flexible and convenient]:There are two flexible and convenient power input methods, power socket and terminal..
  • [Practical setting state]:The relay can maintain the setting state even if the computer is power off or USB is disconnected from computer after....
Check Stock

Xiuxin 2pcs 5V 8 Channel Relay Module Board for Arduino PIC AVR DSP ARM

  • 2pcs/lot 8 Channel relay module board, Working voltage: 5V.
  • This board is for Arduino PIC AVR DSP ARM.
  • Support all single-chip microcomputer control,Industrial circle,PLC controller,Household intelligent control.
  • Relay output maximum contact is AC250V 10A and DC30V 10A.
  • Widely used for all MCU control, industrial sector, PLC control, smart home control..
Check Stock

SainSmart 16-Channel 12V Relay Module Board for Arduino DSP AVR PIC ARM

  • 12V 16-Channel Relay interface board, and each one needs 15-20mA Driver Current.
  • Equipped with high-current relay, AC250V 10A.
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP433, TTL logic).
  • Indication LED's for Relay output status.
Check Stock

Securitron EL-TSB-BK ElectroLynx Touch Sense Bar, Black, 36\

  • The TSB Touch Sense Bar provides touch-triggered release of magnetically locked, non-fire-rated doors. Touching the bar, even through light gloves or clothing, triggers and electronic sensor that releases the lock. For indoor use only, the TSB installs easily on all types of metal, aluminum or wood frame doors. Meets "no special tools or knowledge" criteria in code requirements..
  • Can be field cut to accommodate non-standard openings up to 48".
  • Activates a DPST 2 Amp rated relay when touched (no mechanical movement) which will allow free egress, or initiates the delay on an exit delay timer.
Check Stock