Dragonfly DIY

[...] As an experiment, I wanted to get 16 RGB LEDs running off a relatively small microcontroller.  I got it going with an ATTiny84 using 8 I/O [...]

I'm not going to do anything with this circuit right away and I'm going to tear it down to use the board for something else, so I'm squirreling it awa [...]

[...] ) involved and the common anode configuration, I couldn't avoid ghosting while driving 16 RGB LEDs from 8 I/O pins. This one uses a 74HC595 chip, I'll be using a 74HC164 in the final design to [...]

[...] holder and battery ATTiny85 microncontroller Resources: C source code (if you want to customize) HEX file (if you just want to program the chip) Gerber files (if you want to have the board made as-is) [...]

[...] ) More information: How to compile the C code How to program the microcontroller from the HEX file [...]

[...] year. This is the prototype version of the breadboarded circuit posted before entitled "16 RGB blinkie take 2" [...]

The previous multiplex circuit wasn't working out. I was doing a modified CharliePlex but with the different colors (with different forward voltages) [...]

This blinkie was introduced at Duckon 2014 as the premium blinkie This blinkie is still available for purchase. Bill of materials: power (slide) sw [...]

[...] on GitHub here. Once I've finalized this and sent it to production I'll upload the KiCAD and Gerber files. Here's the schematic: [...]

[...] : C source code (if you want to customize) HEX file (if you just want to program the chip) Gerber files (if you want to have the board made as-is) KiCAD files (if you want to modify the board or [...]

[...] : C source code (if you want to customize) HEX file (if you just want to program the chip) Gerber files (if you want to have the board made as-is) KiCAD files (if you want to modify the board or [...]

[...] , it's the most boring 28 minutes you'll ever see.  It's intended for people who purchase the blinkie kits and don't assemble them at a workshop. [...]

[...] / how to solder workshops that I run (completely as a charity) where people put together my blinkie kits (which I also make $0.00 on).  Those are currently running on a bunch of cheap Radio Shack [...]

[...] a bit of aluminum, bent some tabs up and stuck it to the back of the relay with some heat sink compound. After assembling with the heat sink, a subsequent test only reached 76C which is [...]

[...] temperature control was very bad.  I tried something different - I put a small dab of heat sink compound on the thermistor sticking through the middle of the heater, then clamped the glass [...]

[...] 't posted anything on yet, so here's something quick. Here's a quick video: The first is an Axiom Pulse 60 from Performance ($35 on sale).  That price puts it directly in line with the Cygolite Hot [...]

[...] the #8 screws in the BoM. The "pulseclip.stl" is a small clip that snugly holds an Axiom Pulse 60 taillight (I highly recommend this light BTW, great value for money and probably the best &# [...]