157 | | Buy Arduino Nanos for the sensors as well if you don't like to solder. If you are up for a challenge and want the cheapest possible sensor buy the following 3 parts instead. |
| 157 | Here you have a choice to make: |
| 158 | |
| 159 | ==== Easy, flexible, expensive ==== |
| 160 | |
| 161 | Buy Arduino Nanos for the sensors as well if you don't like to solder or fiddle to much. |
| 162 | |
| 163 | ==== Easy, not as flexible, cheapest ==== |
| 164 | |
| 165 | Use the 3.3V pro mini. A bit slower (8Mhz). Also be aware that some sensors that you might want to attach might requires 5V, read the specs. If that is the case you might also need a step-up regulator to feed feed it from 3.3V. |
| 166 | |
| 167 | http://www.aliexpress.com/item/5pcs-lot-Pro-Mini-328-Mini-ATMEGA328-3-3V-8MHz-FZ0104-Free-Shipping-Dropshipping/1355429221.html |
| 168 | |
| 169 | ==== More complicated, flexible, cheap ==== |
| 170 | |
| 171 | If you are up for a challenge and not afraid to solder a bit then buy the following 3 parts instead. The 5V pro mini does not have a 3.3V output so you will have to use a regulator for the radio which requires 3.3V. |