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• Laser tryout

  Grégory Paul • 11/22/2020 at 16:24 • 0 comments

  I’ve tried out the laser module which works great. I’ve connected it to the 5 volt output of my Wemos D1 esp8266 and the signal on the D4 pin.
  

  The code (very basic) is on https://github.com/paulgreg/Elegoo-37-sensors-kit/tree/main/laser

• RGB LED Module

  Grégory Paul • 11/22/2020 at 15:56 • 0 comments

  I’ve tried the RGB LED modules (both the normal led and the SMD version).

  They work great on 3.3 V. You can find a basic demo version here : https://github.com/paulgreg/Elegoo-37-sensors-kit/tree/main/SMD-RGB
  

• Humidity & temperature module

  Grégory Paul • 11/05/2020 at 20:01 • 0 comments

  I’ve tried the humidity / temperature module with an esp8266 and an Oled I2C screen.
  

  The module is connected to d5 / GPIO14 and works great in 3.3V.

  You can find the example code here.

  Also, I’m using it in my eCO2 sensor project to add more precision to the SGP30 sensor.
  

• LCD 1602 module

  Grégory Paul • 11/04/2020 at 21:28 • 0 comments

  The first module I tried is the LCD 1602, connected to an ESP8266 Wemos D1.

  Connection are a little bit different than for an arduino. I’ve found a great explanation on that nice french blog.

  Instead of using a potentiometer, I’ve directly connected the V0 pin to ground to set maximum contrast.
  

  You can find the example code here.
  

• Power supply module review

  Grégory Paul • 11/04/2020 at 21:15 • 0 comments

  The kit includes a power supply module.

  It is designed to be mounted on a full size breadcrumb and can output 2 voltage (one for each row).

  Voltage can be selected by a jumper : 3.3 V or 5 V.
  The switch next to the pin turns on or off the module.
  

  I’ve used a 12 V HDD power adapter that fitted perfectly.

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