KMTronic USB 220V relay
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USB 4 Relay controller - thermoregulator with sensor TCN75A
Relay module problem with 220v lamp - #25 by wildbill - General Electronics - Arduino Forum
USB-Switch
8-Channel 5V Relay Module for Arduino Raspberry Pi – SainSmart.com
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5V/220V 8 Channel Relay Shield Control interface USB 8 Kanal USB Relais Modul - Elektro Shoppen
KMtronic Ltd: USB Relay Controller One Channel
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Smart Electronics 5V 30V Micro USB Power Adjustable Delay Relay Timer Control Module Trigger Delay Switch|Integrated Circuits| - AliExpress
USB-Relays
Simplibox IO - USB Relay Set – AZ-Delivery
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8 Channels Dc 12v Relay Module Computer Type-b Control New - AliExpress
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USB Eight Channel Relay Board for Automation
