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I'm using DHT22 and BMP180 to mesure temperature, pressure and humidity. I connected DHT22 to pin1(3.3V), pin7(GPIO4) and pin9(GND); and BMP108 to pin3(GPIO2), pin5(GPIO3), pin6(GND), pin17(3.3V). I want to connect 20x4 LCD display, but I've already used both 3.3V pins, I'm following this tutorial. So if I put resistor to 5V pin and convert it to 3.3V would that work?

Thanks!

SlySven
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Pas
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1 Answers1

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Except for total available amperage, there is no limit to the number of things you can attach to one 3.3V pin. They are both connected together in parallel anyway; having 2 is just a convenience. If you have this inside a case of some sort, an easy solution is to get a small breadboard, cut it in half, and attach a 3.3V pin to the + rail. You now have 30 parallel 3.3V slots.

Alternately you could solder multiple wires together on one lead, etc.

goldilocks
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