Geekcreit® 5V 4 Channel Relay Module For PIC ARM DSP AVR MSP430 Geekcreit for Arduino - products that work with official Arduino boards

it can be used with raspberry pi ?

Bonjour, Est-ce que ce module peut être raccordé directement à une sortie Arduino UNO, quel doit être le courant passant dans les fils de commande IN(1 à 4) , merci de votre réponse

I need a automatically multy functional switching system for decoration lighting blinking and flashing randomly

Hello, can I use it for control a light at 230 V AC ?

Does it have optocoupler protection?

What app can i use to control

I bought 4 of these boards. Is there a schematic for this board?

can I used it for elevator to stop for each floor??

can it is controlled by remote?

Please can you say what the blue Jumper JD-VCC is used for?

How to use this relay module with Raspberry Pi and convert to High Level Trigger?

Can this relay board be used with Remote control

Does this product work for a 12v dc supply or a 110v AC supply?

what is the board size and the distance between the mounting holes?

Can I use one of these 4 relay boards for my CNC DIY build or isd it really neededjQuery11130027990043498030914_1671405915849 I'm a newbie to the electronics field so plz be nice. I haven't gotta scooby doo what I'm doing as of yet. Going to do some classes on this soon. What are they for? Why use this relay thing??

During development of my arduino script, I left the AC lightbulb unplugged from the wall socket. I was tetsing my code by looking at the red LED indicator on the relay board as well as the audible latching of the relays. Everything was working perfectly.Once I plug the lightbulb into the AC socket to test the relays, strange things happen. I have an interrupt pin on Uno pin 2, sonnected to a pushbttong to change modes in the program. Once I plug in the AC, this interrupt is triggered without me pressing the button. THis only happens when I plug in the AC bulb connected through the relay. As soon as the AC is removed, the issues goes away.Any suggestions?

this product.. can make jammer camera blocker or not

what is the small jumper for on the right side of the board?

where to connect wire left or right?