Hey gang-
maybe someone with more battery experience can shed the light on this holy grail! lol
I have a project/pcb/circuit.. its a minimal Arduino circuit with on-board microSD card.. (designed to play PWM audio output on D9..using SimpleSDAudio lib)
I have it all breadboarded up..to mirror he minimal components the PCB will have..and have tested it just fine..
Im at the stage where schematic/board layout and firmware/code is pretty much complete... (and soon to order some pcbs for population/assembly)
in the design stage. I was loosely thinking a +3v CR2032 would 'work'.. but be at is bare minimum...
However that turned out NOT to be the case.. while I believe the +3v is fine... I dont believe these can deliver enough current for the project.
I tested on my PSU and having it at +3v was fine.. but turning down the current.. I eventually got the same results/reaction as I did when running off the CR2032 coin cell.
my question(s) are as follows:
1.) How much current can the CR2032 give? I have looked and not only do I see different numbers.. I usually only see it for mAh... not mA? Im thinking I need about
I understand that these CR2032's are mostly for high energy, low power projects...
and I guess Im needing the opposite... or at least just more current.
2.) The space/area I have to work with.. really is only suited for a 'coin cell' type of battery... it can be a little 'bigger' (23mm diameter I think I have room for?.. maybe a bit more if needed)... Is there anything out there that can work for my needs?
3.) Is there a value/sepc on these datasheets Im supposed to be looking for/at to see if the battery can DELIVER the current I need?
Secondary question... about my PSU (benchtop Mastech HY1803DL)
I set the voltage to +3v
I set the current to be 'about' .10-.11 Amps (100-110mA)
when I connect it to my project..and power it on..
I see the current LCD screen 'jump'.. to about .06A....... when I press the button and trigger an audio clip to play.. I see the current LCD screen on my PSU jump to about .08A
Im curious as to what my current LCD screen is 'reflecting' (telling me).. is this the current 'draw' of my project? (kinda cool/nice if it is...nice way to 'tell')
thanks!!