In this article, I will explain how I managed to get the WEMOS Lolin32 lite board running for more than a month on a single 1200 mAh LIPO battery. After showing my solution, I will get back on the biggest mistake I made during my tests (SPOILER: error handling is important).
Continue reading “Keeping Lolin32 lite up for more than a month”
My last project uses a Digispark (ATtiny85) as an USB keyboard to send the lock screen shortcut (Ctrl-Alt-L) when a single button is pressed. To bring some fun, I bundled the whole in an emergency stop push button.
Continue reading “Emergency Lock Button”
It’s been a while since my last blink on this blog. Today I’m gonna blink 64 LEDs … I mean an 8×8 LED matrix. This article is about driving a LED matrix from a MAX 7219 with a BugOne board (code for Arduino also provided).
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After my previous article on the MAX6969, I’m investigating the reason of the strange visual artifacts on LEDs when changing data.
Continue reading “MAX6969 – Bug correction”
Today I decided to take the MAX6969 sample a step further using Pulse Width Modulation (PWM) to vary LEDs intensity.
Continue reading “MAX6969 and Pulse Width Modulation”
I recently ordered a bunch of sample MAX6969 from MAXIM. These are 16 ports current LED drivers I’m planning to use to drive optoisolators (MOC3041). In my first attempt, I used an Arduino plus a bunch of LED and made them blink of course.
Continue reading “MAX6969 blinking”