I just want to ask a question about on my final year project. Is it possible to power up the Arduino uno and sim800 gprs gsm shield using 12v 15 amps power supply through its DC barrel jack? I am also using a 2 way dc barrel jack splitter to it in order to power them both.
I am using the said power supply because I also need it to power up the PTC fan heater and a humidifier.
Hello sir, sorry but i am far away from my laptop. It is just a thinking of mine while driving back home. This is what it looks like, i am using a 12v 15amps power supply then attached a dc barrel jack adaptor to the 2 way dc barrel jack splitter which is connected to the dc jack ports of uno and the gsm shield. Am i able to power this? Or my modules will burnt up?
Yes sir, i read its tech specs i knew that it power up to 12v. I am just asking if I use the 12v 15 amps power supply with a 2way dc barrel jack splitter to the uno and gsm shield, will it be able to power up smoothly? Or will my modules will burn?
Well, some components like LEDs will draw whatever is available and commit suicide…
The other typical issue is loading the regulator of the arduino as it has to perform the 12v to 5v conversion, so if the arduino pins draw lots of current it can become an issue for the regulator thus for the board.
SIM800 doesn't like 5V supply and 5V communication. When you power up this from 5V it will yield (via RS port) that voltage is too high. It also take 2A in short peaks when sending data to network (which 5V regulator at Arduino board doesn't like). It's designed to work from 1 Li-Pol cell. So good approach is using some power bank / charger module and lipo or add dedicated step down converter for power it up from about 4V.
ps. I use SIM800L as standalone module, maybe "shield" got power issue resolved in some way.