Fred Temperton

Electrical engineer and lover of LEDs

[Fred Temperton @FredTemperton]

@tomfleet @idlehandsdev There are also ones using the SK9814 controller giving you 16b/pixel and much lower quiescent (5uA vs 250uA) in a very slightly larger 1.1x1.1mm package
https://t.co/wfUBTesrTN

[Fred Temperton @FredTemperton]

@mariusheier You can get offset ones like this, but looks like it's about 1mm off the board so maybe too high
https://t.co/MKH6IwyJL5

[Fred Temperton @FredTemperton]

@chardane @GregDavill @esden @adafruit Really awesome work! Nicely done especially with the web app!

[Fred Temperton @FredTemperton]

@gregoryknauff Awesome work, great design!

[Fred Temperton @FredTemperton]

Twinkle animations turn out to be really hard to get visually looking right

[Fred Temperton @FredTemperton]

This years holiday ornament was the most ambitious yet! Three interlocking PCBs to form a 3D snowflake, 140 LEDs and 3 months of design and build

[Fred Temperton @FredTemperton]

Several animations were programmed and it goes to deep-sleep after an hour to extend battery life

[Fred Temperton @FredTemperton]

@ThrillScience Oh awesome! We were theorising things like that or somehow responding when the group are all together or something. So many fun possibilities!

[Fred Temperton @FredTemperton]

Made these pins for a friend trip to Disneyland a few weekends ago. The LEDs are potted in resin that's tinted grey with a 3D printed border and lasts about 100hrs on a single CR2032

[Fred Temperton @FredTemperton]

@bradanlane @mrtwinkletwink So for these pins the 3D printed surround acted as the wall of the pour volume and I pre-sealed them with a bead of superglue. Silicone molds work well too. I’ve also seen people wait until the resin starts to kick before pouring so it’s thicker

[Fred Temperton @FredTemperton]

@Toble_Miner @Borgel Got them from amazon in a big multipack. They said they were nickel plated so I gambled and they soldered up perfectly, so I assume they are!

[Fred Temperton @FredTemperton]

@bradanlane @mrtwinkletwink I’ve just been experimenting quite a bit and settled on liquid pigments but the amount needed is minuscule! A hot air gun is really useful for popping surface bubbles too. And make sure your mold is leakproof 😅

[Fred Temperton @FredTemperton]

@highenergybeams @Borgel From my friend who wrote the FW: the scaling is 1:1. The ALS ADC result is DMA’d directly into the timer prescaler, so a 2x increase in ALS voltage causes a 2x increase in max duty cycle

[Fred Temperton @FredTemperton]

@wrickert7 @Borgel Thanks! Nickel plated so solder up a treat!

[Fred Temperton @FredTemperton]

@wrickert7 @Borgel Purely as it was the smallest Digikey had in stock at the time 😂

[Fred Temperton @FredTemperton]

@highenergybeams @Borgel Ambient light sensor! Just a phototransistor really - ALS-PT19

[Fred Temperton @FredTemperton]

@GeekMomProjects Thanks! I learnt that different colour filament multipacks are a thing! The most tedious bit was changing the filament so many times though😅

[Fred Temperton @FredTemperton]

@chardane Thank you!!

[Fred Temperton @FredTemperton]

Was inspired to do this project after seeing @chardane's awesome hats at #3HSF! https://t.co/n23TJHhkaN

[✨ charlyn ✨ // @[email protected] 🐘 @chardane]

Before 2020, I had no desire to go to Disneyland. In 2021 tho? Heck yeah!

I couldn’t go without making 4 of these glowy hats for my quaranteam! 🥳 Made w/ @adafruit high density silicone bead LED strip (~160 LEDs per hat!) + a Trinket M0 on #circuitpython

Smol build saga👇🏽

[Fred Temperton @FredTemperton]

An STM32G031 drives the LEDs in a 4x4 matrix, there's a 3V boost to keep the brightness constant over discharge and an ALS for auto-brightness