And sharing anything with an SD card is just asking for *buzzzzzz* trouble.
i didn't understand this about the sd ! can you explain it ? im planning to connect a raspberry pi in future which uses an sd card...
Any of the boards or sensors need a low noise supply - for instance audio amp? It's usually a good idea to avoid sharing a supply between digital logic and sensitive analog circuitry to reduce the noise from the logic - for instance a microphone amp should not share supply with
a microcontroller - noise levels of microvolts matter for microphone signals.
So you suggest to seperate the supply of sensors from other supplies right ? The board will be a gsm shield , and the supply/wiring is recommended from the tutorial... the sensors will be humidity digital sensors
If all the devices run at 5V, then you could use one single 5V supply which can provide *AT LEAST* the total amount of current draw for all the devices.
So, for 3 devices which are, for example, 5V, and 1A, 800mA and 120mA respectively, a power supply of 5V and at least 1920mA would be needed, so a 2A would just about do for that. I like to add a bit of extra for leeway, so a 2.5A 5V supply would work for that example.
So i can have a 5V supply with 1A over the sum/total amps of the items in my project which requires 5V as one group , with A i will not damage something , i will damage only with voltage is that right ?
Thank you allo for answering