From 1f74c443405b2827217275bbdc428bd9320bb99a Mon Sep 17 00:00:00 2001 From: schneefux Date: Sun, 24 Nov 2019 17:18:36 +0100 Subject: Rework index page layout to include projects --- content/tech/esp-ledstrip.md | 26 -------------------------- 1 file changed, 26 deletions(-) delete mode 100644 content/tech/esp-ledstrip.md (limited to 'content/tech/esp-ledstrip.md') diff --git a/content/tech/esp-ledstrip.md b/content/tech/esp-ledstrip.md deleted file mode 100644 index 1342a2f..0000000 --- a/content/tech/esp-ledstrip.md +++ /dev/null @@ -1,26 +0,0 @@ ---- -categories: -- embedded -date: 2016-06-05 -title: (Almost) Wireless LED strip controller ---- - -After a [failed attempt]({{< ref "music-led-visualisation.md" >}}), I succeeded in building a wireless analog LED strip controller. - - -![Glowing led strip around controller](/images/esp-ledstrip/glowgreen.jpg) - -The most important part in this setup is a 12V-3.3V regulator that passes 12V to the transistors and 3.3V to the WiFi chip. Instead of gluing inefficient Darlington transistors on top of CD cases, I used IRFZ44N MOSFETs with a heatsink each on a stripboard. The principle remains the same as with the Arduino. - -![Controller top view](/images/esp-ledstrip/top.jpg) - -There are fewer long cables, which makes the controller more compact and less ugly. - -![Controller back view](/images/esp-ledstrip/back.jpg) - -On the ESP8266 runs a web server with a simple API to change the colors and a UDP listener that allows the Hyperion server to connect. -The Arduino sketch can be found [here](https://git.schneefux.xyz/electronics/esp-ledstrip/src/master/esp-ledstrip.ino). - -![Controller attached to FTDI](/images/esp-ledstrip/debug.jpg) - -A few weeks later, I spotted a mistake in my build. I used IRFZ44N transistors but I should have used IR**L**Z44N transistors instead. The difference is that the Z version needs a higher voltage at the base, so the LEDs were never bright and drew just about two thirds of the power at maximum brightness. -- cgit v1.3.1