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August 31, 2012
about 3 years ago
Hi guys - can I power the JPEG trigger by connecting the 1-5V pin to my Arduino Uno +5V? Or should I use a separate source…
Also - I’m confused by the trigger pins, say for D2, do I need to hook up the 5V and GND or just the trigger pin?
about 4 years ago
I just did a test - I set pin 10 to an output at the start, and run… after this line of code:
if(!sd.begin(SD_SEL, SPI_HALF_SPEED)) sd.initErrorHalt();
I do a digitalRead() on pin 10 and it’s 1. I’m wondering if it’s ok for me to set to LOW at that point and use it for my own use?
Thanks Toni I’m using Bill’s library so I thought it took care of that 9 vs.10 issue. I’ll go to his site and ask him what’s up.
Looking at the schematic it seems that pin 10 is free but when I connect it to an LED, the LED lights up.I’m using an UNO. Pin 5 seems to work as a free pin but I’m confused as to what other pins are actually free to use.
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