TL;DR - Can i power a Wemos D1 R2 board, connected to a DHT11 and Soil Moisture Detector with a Router Power Supply that have a output of 9V and 0.6A?
Hey, imma newbie and i need some help externally powering this board.
The board i got is Wemos D1 R2 WiFi, that can receive a input of 9 to 24V, and i want to know how much current (Amperes?) the power supply needs to offer.
The board is connected to a DHT11 and a Soil Moisture Detector
I had stashed somewhere a TP-Link Router Power supply with a output of 9V and 0.6Amp
And i want to know, can i use it to power it, or a power supply that can offer more current?
If you are using a 9V battery forget it. Use several AA or larger batteries in series. How many amperes the power supply needs to offer I cannot tell you. It needs to be at least large enough to power your load. To simplify this your load has an understanding with the power supply's to only take what it needs no more. If you use a 10A power supply and you have a load that uses 500mA it will work fine, it will take 500mA. However if you use a 1A supply it will also work fine, in either case it will only take 500mA, no more so the rest is left for other things or not used. Voltage is different and will force what it can into the load upto its voltage. It will destroy things. It uses current to force it. That module has a switch mode power supply which works nicely and stays cool even when supplying a few hundred me from a 12V supply. Also with the switch mode power supply its efficiency is much better and does not waste so much power as heat. It will draw less current, the ratio is approximately the the same as the input vs output voltage + efficiency loss. Your existing unit should work as the arduino is rated at 9-24V power input. Also all the outputs on the board are 3V3 and will not tolerate 5V. On your IDE you will need to add the ESP8266 and select the Llinol D2 R1 board. They work great for me.