Скачать или смотреть Using Relays with Particle Electron or Photon

So, you want to control things with your Particle Photon and/or Electron do you? Well, a relay is a perfect way to do that. Whilst there are many ways to control an electrical signal from digital logic such as transistors and optoisolators, they usually aren’t ideal for certain applications. For example, a transistor may require additional electronic components in order to work like a standard switch, but most transistors can only handle small amounts of power. An optoisolator can only handle extremely small voltages because it’s driving an LED/LDR combo. Which brings us to relays.

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