May 22, 2009
A Local College of Engineering and Science
about 8 months ago
The cable/pin 6 is distinguished by its grey color in this product, and it can lead to a pin-number misunderstanding with other JST SH Jumper 6 wires whose pin 1 cables are grey. I guess the line going to GPS pin 1 is distinguished in this product. Please consider giving notes.
about a year ago
I like Pro boards, but I sometime miss the 3v3 pins next to the 5v pin for my shield compatibility issues.
If you have chance, please consider to change PCB 5V pattern routing going from FTDI con, as firstly 5V pin then to another VCC pin assingnd to 3v3 on UNOs. It may make easy to cut the 5V pattern and attach a 3v3 regulator on the bottom.
about a year ago
The Logic Level converter you’ve mentioned has two bidirectional, open-drain channels by FETs, and two one-way level shift channels (HIGH-In and LOW-out) by resisters doing voltage divider.
Bidirectional open-drain level shifters are (by choosing appropriate FETs) compatible with I2C bus, but it has fixed High- and Low-voltage sides.
Buffer-gate type bidirectional level shifters like TX010x based ones have two sides and any side of it can be assigned to High (or Low) voltage side, though lines pulled-up may confuse the chip as supersat mentioned above and not compatible with I2C.
about 3 years ago
Yes except the possible max output power around 1W per ch.
I replaced four 0.47u ceramic ? caps with audio-grade electrolytic 0.47 caps and I think sound quality has been improved. It will be nice if in future the PCB design is modified to make slightly larger area around those caps.
about 5 years ago
Finally I got the response from my Display!
Don’t forget the CPHA bit for SPI mode:
SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR0) | (1 << SPR1) | (1<<CPHA);
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