The Manx Beard Club (just Kevin, Juan and me) entered a local tree festival at the town hall. In amongst all the charity trees we installed the Department of Villainy Kryptonite tree which is completely green (apart from the purple lamp holder at the top). It's got 400 green LEDs with custom 3D printed kryptonite crystals and a huge medley of every other green or clear cap we could find to jam over lots of the other LEDs. On top is a green LED flame lamp.
https://www.youtube.com/watch?v=XvUXlih9b_c
There is a music facility which is based on a waterproof enclosure fitted with two mylar speakers facing downwards (the case has four feet added to keep it clear of the ground) and it uses a very common eBay module that uses a standard USB power supply (micro USB) and either a micro SD card or USB drive to play music via a low power onboard amp. The music is a theme park queuing area style loop with a festive theme. The audio was more of a joke than anything to see how the organisers would react to the tree playing music.
Technical issues that arose were:- The green LED sets were hard to find and the ones I got have a very odd controller that uses a single chip for time control (8 hours on 16 hours off), a voltage boost section to drive a higher voltage string of lights (about 20V) from the 5V supply and also flash the LEDs in various patterns by polarity reversal.
On power up the unit starts the 8 hour shut-off timer by default meaning that the tree lights would turn off prematurely. Modifying the controller was not an option, so I added a 24/7 time switch programmed to turn the lights off every six hours for one minute to reset the timers.
The little MP3 player resets to a default audio volume when powered down, and the track chosen was so bass-rich that it caused distortion. The easiest fix was to run the audio file through an online processor that reduced the volume of the entire MP3 file. Nudging it down by about 6db resulted in a perfect low level ambient sound.
Although the audio system was added as a joke it may actually get used on days when the surrounding office staff aren't in.
mark barratt
2018-12-03 12:40:08 +0000 UTCBig Clive
2018-12-03 04:29:50 +0000 UTCBig Clive
2018-12-02 02:30:22 +0000 UTCBig Clive
2018-12-02 02:29:25 +0000 UTCmark barratt
2018-12-01 21:27:52 +0000 UTCNuts 'n' Proud
2018-12-01 16:11:55 +0000 UTCChuck Kirchner
2018-12-01 13:28:02 +0000 UTCThe Tinkering Shed
2018-12-01 11:24:24 +0000 UTCMichael Thompson
2018-12-01 08:58:24 +0000 UTCBig Clive
2018-12-01 06:47:52 +0000 UTCKevin Bornewasser
2018-12-01 03:34:42 +0000 UTC