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January 5, 2007
C, C++, Objective C, Java, Perl
about 3 weeks ago
The spec sheet says the cable is terminated with an XH2.54-5P connector. This implies 2.54mm (0.1") pitch, but all the JST XH series connectors I can find are 2.5mm pitch. Can anybody confirm this product has 2.54mm (0.1") pitch connector?
Does anybody have a good source for the mating connector? SFE doesn't seem to have them, nor any of my other standard shops. Amazon might sell them in connector kits but the product descriptions are so poorly written it is hard to tell.
about 8 months ago
Looks very interesting to play around with, but it isn't clear what connector is needed. The data sheet says it terminates with DF37B-24DP-0.4V(51), so the mating part would be DF37NB-24DS-0.4V(51). However, the shape of the connector tail in the data sheet does not match the photo above. Can you confirm the connector?
Also, the attached data sheet isn't enough to write a driver for this - you'll need the ST7789V data sheet too.
about 8 months ago
Looks like fun to experiment with, but I'm curious how bright it is - is it too dim to use outside?
SparkFun please make a breakout board for this; perhaps a board that holds 3 or 4 of these in a row, and make sure it can be stacked side-by-side so you can build up a grid (crazy expensive Tic-Tac-Toe anybody?)
Also, just to be clear: This is not a color display - it is a monochrome display with a color backlight. You can set the backlight to any one of 64 colors, but each pixel is either black or showing the backlight.
about 8 months ago
Please consider making a version of this board with built-in level shifting. No need for a boost convertor; the 5v side can be powered by the project it is plugged into. Just start with this board, add the standard MSOFETs & pull-ups, and add the three pins for 5v0 (in), SDA5 and SCL5 (don't get rid of the 3v3 power & signal pins though).
Yes, this can be used as a coupler to join two cables. However, longer cable runs might be less reliable. This page provides some guidelines , but it mentions 4 ft as a practical upper limit for Qwiic.
about 11 months ago
This is a great board! I particularly like the 3-contact "SVG"-style ports - installing female headers allows plug-and-play with Vex robotics sensors/devices. And the Qwiic port is great for all my I2C devices.
A few minor suggestions for future revisions:
(1) add a pin-1 indicator to the 2x3 ISP header.
(2) Figure out a way to get pads for the missing I/O ports, even if they can't follow the SVG header layout exactly.
(3) Add a pad and cuttable-trace-jumper to each of the LEDs and the reset switch, so they can be repurposed if desired.
(4) Add a 3rd contact to J1 wired to un-switched VIN - allows power from the back but still switchable, and the existing switched-VIN terminal lets the board power other off-board devices.
The data sheet says "Mounting Bracket E69-1 supplied with A6A2-CWZ encoders", but I don't see any brackets in the product photos. Are brackets included? (I see there are two M3 mounting holes on the face, but I was curious of the clips are included or not)
about 2 years ago
With the updated description, I knew exactly what I was getting, and am very happy with what I got. These are perfect for adapting VEX robotics sensors and motors to non-VEX controllers.
Regarding wire thickness, I'm happy with the heavier wire, since it can pass decent current and is mechanically stronger than tiny wires - though the description should say what the wire gauge is. I agree they might be a bit heavy for RC applications where every gram matters.
about 3 years ago
Nice looking little board, and just the thing for a landscape lighting project I've got in mind.
One thing to consider for future board revs: Add a couple more solder jumpers so the resistors can be configured in series as well. That would provide a 3rd current option of ~167mA without requiring any additional parts.
about 4 years ago
;) SHT15 is the part number for the chip - SparkFun didn't pick it.
(Well, they picked the part for this BOB, but they didn't pick the name/number for the part).
No public wish lists :(
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