What is it?

This is a 16-bit ADC module based on the popular ADS1115 chip. The board features a rotary switch that lets you change the I²C address without soldering, plus a Stemma QT connector for easily daisy-chaining multiple boards.

Why did you make it?

I was working on a strain-gauge project and needed eight gauges connected to the same MCU. The ADS1115 works well for this, but wiring that many modules required an insane amount of soldering—I had to set the I²C address on each board by re-soldering an SMD resistor and then hand-wire all the power and I²C lines!

So I built this module for two reasons:

• Cheap modules on the market don't have a Stemma QT connector.
• Some options require re-soldering SMD resistors to set the I²C address. Using a rotary switch instead is not only cool but also saves time.

What makes it special?

• Rotary I²C-address switch for effortless address selection
• Stemma QT connector for simple daisy-chaining
• As a result, you can easily connect up to four ADS1115 boards to a single I²C bus with no soldering at all