⚡️ 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM - JBtek 4 Channel Review

This is a durable plate that is easy to use. It can be powered by a 3.3V or 5V Arduino and probably most other controllers. (The 3.3V setting is different from the 5V setting). I used this board with a vape cartridge and high capacity batteries to create a steampunk hat that releases "steam". Easy setup (with Arduino UNO): Connect VCC to a 5V power supply. Connect GND to ground of the controller. Connect IN1-4 to the controller's DIO pins. Leave the JD-VCC jumper on VCC. Connect your common…

They work great with Arduino. Note, however, that they draw enough 5V current that you can't reliably use more than a kit or two powered directly from the Arduino. At three, I was letting the Arduino's internal voltage drop, resulting in random resets. The solution is simple: just supply the pins of these modules with 5V from another source. Make sure the ground is on the same plane as the Arduino as the control pins will use it as a reference. I soldered a thick wire on the bottom to connect…

I would give 5 stars except it is active at low level. The problem with active low is that the outputs of many control systems default to low at power-up. Thus, the relays close on power-up until the default program starts and the system sets the outputs high. So in this scenario, if there is a power failure, an activated relay because the pin was pulled low, or ground becomes a deactivated relay because the power supply has been removed. So I think it's best to setup such a relay board as…

Delivery: Mine arrived with 3 bent pins sticking out of the plastic packaging. Luckily I don't plan on using all four channels, but the buyer should be careful - the packaging on it isn't particularly secure, as there's no foam or anything else to protect it in transit. My star rating is mainly based on this packaging issue. Functionality: If you use this with a Raspberry Pi, by default they will not start in the "on" phase when booting, but will be about halfway. All built-in LEDs on this…

1 star removed due to lack of documentation but otherwise very economical relay board. Provides optical isolation and some degree of physical isolation. I would consider this board suitable for light AC applications. The device works well with my Raspberry Pi 2 and Pi 3. Will buy more. An add-on for Pi users. When the Pi first boots up, the GPIO pins are not yet defined as outputs. The LEDs on the relay board are dim, indicating the pull-up resistors are working. However, as soon as you define…

Great board for Raspberry Pi. Provided you have a reliable power supply you can power this board with the +5V provided on the header (pin #2). The relay board is fully buffered meaning the relay coils are not driven directly from the GPIO pins protecting the Pi and meaning this board is plug and play. If you use the Rasp Pi a lot, I highly recommend a USB volt/ammeter combo so you can monitor your power consumption. Under full load you should make sure the voltage on your USB port is as close…

Self-Documentation: Since there is no documentation, I was very skeptical that this device was trying to deliver too much current to my RasPi's GPIO pins (which that can only drain/source no more than 16mA per contact). Reading the specs for each component "confirmed" this with an optocoupler (817C) showing a normal operating current of 20mA - wow! on the IN'X' pins, which is within the tolerances of the RasPi (most Arduinos can draw/source 40mA or so, so there are even fewer problems). The…