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Desk of Ladyada - Pixel Shifter Proto & Floppsy Re-visit 🖥️📀💾 https://youtu.be/sJrZRJUlvhM
We've got working Pixel Shifter prototype PCBs, leveling WS2811s and inverting TM1814s—final boards are booked! Also revising the Floppsy board for 3.25" drives, adding buttons, Apple Disk support, & more. Plus, we’re on the hunt for a short rotary encoder!
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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We are LIVE! Desk of Ladyada - Sample Sunday: cafe lights and TM1814s 🌈💡🔌 https://youtu.be/7qozX1owTSM
A level shifter just for pixels 🔌✨💡
After noodling with some WS2811s and TM1814, we really wish we had a board that would level-shift our NeoPixel signals from 3V to 5V or give us an inverted data line. So, we designed this board. It uses an AP3602
https://www.digikey.com/en/products/detail/diodes-incorporated/AP3602AKTR-G1/5305823
charge pump to give a clean 5V reference voltage from 3~5V. A 74HCT2G34
https://www.digikey.com/en/products/detail/nexperia-usa-inc/74HCT2G34GW-125/1300830
shifts two signals - we call them DAT and CLK, but it could be anything really - to 5V from 1.8~5V. Finally there's an 74LVC1G04
https://www.digikey.com/en/products/detail/texas-instruments/SN74LVC1G04DBVR/385716
inverted data output line for TM1814 and other weird chips. Terminal blocks on either side make this a no-solder board. There's also a single disableable 1.5mm NeoPixel on the DAT line for testing the WS281x signal coming through OK. Coming soon.
RGBW cafe lights with TM1814 chips 🌈💡✨
More! We got a set of weatherproof cafe lights with RGBW LEDs for a 'pure' white color light. However, they don't use the WS281x chipset for the control signal. Instead, it's TM1814, which is kind of similar but has a few key differences. One is you have to send an 8-byte 'global brightness' setting to start, and then you have to continuously send a signal over every 400ms, and to top it off, the signal is inverted! After some PIO twiddling, we did get them working pretty nicely with an RP2040
Through CircuitPython examples, learn about the capabilities of the RP2040's Programmable Input/Output block (PIO).
Make us think - we should craft a NeoPixel signal shifter board with an optional inverted output! Coming soon!
