Aihasd 4 Channel 12V Relay Module Bluetooth 4.0 BLE Switch for Apple Android Phone IOT
Price is below average
Current Price
$18.72
Average
$18.82
Min Price
$18.72
Max Price
$18.88
Price dynamics
1%
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in next 2 weeks
in next 2 weeks
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Product review & video
hello our bill here from DIY malls calm this is the first tutorial on our Dion accessories in this episode we will learn how to control high voltage electronic devices we can do that using relays relay is actually a switch which is electrically operated by an electromagnet and electromagnet is activated with a low voltage for example five volt from a microcontroller and it pulls the contact to make or break a high voltage circuit as an example for this tutorial I will use this four channel relay module this is also known as for our blue key because on the backside of this module you can see a Bluetooth module which is integrated into this relay module it facilitates you to control this four channel relay board through bluetooth without making any input wiring connections to the relays so this is an extra feature which is added into this relay board and cannot be found in other inner boa
