Today I would like to share with you power supplies I am have tested and ESP8266 modules which I am currently using. I have done those tests as often when I was connecting one or another sensor to ESP8266 module it was loosing power and resetting itself.
Breadboard power supply modules
1) Breadboard power supply module
This one I like the most. It fits well, doesn’t fell off easily. Can operate on DC 6V – 12V input and does 3.3V or 5V output. Has reset button also additional power pins which are usefull in most DIY projects. You can use e.g. 4 x AA or 4 x AAA batteries or 9V battery.
2) Breadboard power supply modules
This is seconds breadboard power supply. It can be powered byt DC 7V to 12V. As a output has 3.3V or 5V. Has more common micro usb socket so could be powered up from any PC, laptop or power bank by any smartphone similar cable.
3) Additional elements
You can use external power supply, usb cable or any other type of power source. I have used batteries as they are cheap and portable.
Modules I am using:
Those are to basic and I think cheapest easy to use ESP8266 modules. You can simply find and order them from chine. They cost about 2$ per peace. Different between those is memory size blue modules has only 512kb where black has 1024kb.
Those are nodemcu modules which has ESP12 modules. They are three version of it but V2 and V3 are most popular. I read that those modules are similar but even from hardware site there are similar their sizes are unfortunately different. V3 is just to big in my opinion as when installed on breadboard there is not holes left to connect anything to it. V2 is a les wide in compare to V3 and has 2 lines of wholes left when installed in breadboard. You can see it on attached pictures.
According to other types of ESP8266 modules. You can read more on esp8266 homepage under this like:
Github repository: https://goo.gl/ii9xsz
Be positive and stay calm!