Attention to the doc

Attention to the doc

Relay module 8-channel low active 5V for Arduino PIC ARM DSP MCU April (Electronics)
Buy at Amazon.com

Customer Review

The product is functional, however, attention to the doc, it is innexistante.

A jumper allows to use an external power supply if desired (ie practice). The doc is easily found on the internet, all relays "low-cost" 8 cannaux come from the same manufacturer.

Yes relays operate on the 3.3V output of the PI raspberry. (I recommend even when the power separately 5V).

I ordered this product on another site (shipping), but a friend ordered this model on amazon, they are identical. Many are amateur blog tutorials using the relay model.

Good hack,

Pouic

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