Simply Automationized: Raspberry Pi - A List of ADC Raspberry Pi Hats / Add-on Modules.

A list of ADC Raspberry pi Hats / add-on modules. I will be doing another list of modules that are not hats but can be connected to the pi.

First a breakdown of what resolution and/or sample size mean. If you see 8 bit, 10 bit, 12 bit etc you can find out the amount of samples by 2^(bits). so 8 bit would be 2^8 = 256 samples. So if you have 0 - 4.096v inputs and you are reading and you are reading wind speed 0-100kph.
4.096v = 20 m/s and
0 = 0 m/s (even if the threshold on making the anemometer spin is 0.5m/s)
so if the wind is blowing at 10m/s you would have an analog value of 128
you can take this equation ((20-0)*125/256)+0.

Here's a break down of the conversion:

MaxR = max wind speed
MinR = min wind speed
ADCin = analog input from anemometer
ADCm = max sample/ resolution size of your ADC

Scaled analog = ((MaxR - MinR) * ADCin/ ADCm)+MinR

8 Bit has 256 samples
10 bit has 1,024 samples
12 bit has 4,096 samples
14 bit has 16,348 samples
16 bit has 65,536 samples
18 bit has 262,144 samples
and on and on..

Keep in mind that higher might be better but not always. It depends on noise, sensor quality and other factors.

Sadly the list below yields nothing less than $10 for an add-on module.. If you wanted to use the PiZero and a module it wouldn't be cost efficient. Maybe a reader can help kickstart some simple cheap one purpose pi-zero hats such as an ADC for iot. This left me to try other options possible a esp8266 (has a single 10bit analog input) or a Photon (~$20 and has 8 Analog inputs 12 bit). There are some none add on modules that are i2c/spi connectable if you don't care to engineer your own enclosure/setup.

Here's an example $3/module and tiny for pi-zero happiness :-)

LINK