Hi!
So I am preparing to get some prototype PCBs made from my schematic. I have been testing on bread board and seems to work, I have however a few questions before laying out the board and sending gerber files to production.
I have 4 mosfets (Q100, Q101, Q102, Q103) on the board to switch 12V DC from pins on my uC (electric imp). However If i measure on the output from mosfets (i.e. P100), when the i/o pin is low, I read like 5-6V even thou I would expect to see 0V.
If i put a load on, even small like 10kOhm, i will read 0V as expected.
Given that I will all ways have a load on, it is not really a problem, but I was just wondering why this is happening?
Another thing: look at the block "12V control for electric lock". Is the CARD_PIND sufficiently protected and does D201 and R202 make sense?
And last: if you see anything else that seems off please comment =
So I am preparing to get some prototype PCBs made from my schematic. I have been testing on bread board and seems to work, I have however a few questions before laying out the board and sending gerber files to production.
I have 4 mosfets (Q100, Q101, Q102, Q103) on the board to switch 12V DC from pins on my uC (electric imp). However If i measure on the output from mosfets (i.e. P100), when the i/o pin is low, I read like 5-6V even thou I would expect to see 0V.
If i put a load on, even small like 10kOhm, i will read 0V as expected.
Given that I will all ways have a load on, it is not really a problem, but I was just wondering why this is happening?
Another thing: look at the block "12V control for electric lock". Is the CARD_PIND sufficiently protected and does D201 and R202 make sense?
And last: if you see anything else that seems off please comment =
Attachments
-
299 KB Views: 44