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Bunch of Electronics Projects [Just Do It Challenge]

#1

Introduction

After my initial idea for this summers project got stuck, I took out the list of many little projects I wrote down over the past year.
This thread will house a bunch of them.

perform sanitychecks = false;
do burn_fingers = avoid;
enable soldering_iron = true;

Projects

1 - LED-Christmas tree

Description: A cheap little USB christmas tree. As the original LED did not have a resistor, the one it came with burned out rather quickly. My instant fix was to solder some resistor that was in range of beeing the right one to it, and a blink cycling LED…

The idea: Replace the blinking LED with an RGB LED, attach that to a micro controller and programm it pretty.

Parts: Link

Name Count Note
ATtiny85 1 Cheap, simple, works
150 Ohm resistor 1
56 Ohm resistor 2
RGB-LED 1 4-pin
USB lead 1

2 - Battery LED Lamp

Description: LED light with an odd flickering quirck. I suspected the switch to be the cause (it is not), faulty wires are ruled out, a capacitor tacked accross the aray did not fix it…

The idea: Replace everything except the housing. New LED array, new switch, charge controller, battery.

Parts: Link

Name Count Note
Switch 1 I do not trust the switch!
Battery 1 500mAh, should result in 3 hours on time
white LED 8
39 Ohm resistor 1 >2W
Adafruit 1904 1 Link, it is a charge controller

3 - BananaPi SSD NAS

Description: My mother and sister (sometimes me) are exchanging quite a lot of small files, be that single music tracks or a hand ful of photos. Right now, that happens via handing arround USB drives.

The idea: Have a BananaPi with an SSD, hide it somewhere and let that handle local file sharing. Be it via D-LAN or Samba (or something else).

Parts: Link

Name Count Note
Banana Pi 1
5V 2.5A wall adapter 1 Or do I need 3A :thinking:
Banana Pi SATA cable 1 curious how this works
Banana Pi case 1
ADATA SU 630 1 Unsure about capacity, 240GB, 480GB :man_shrugging:

4 - Illuminated base for etched crystal

Description: I got one of these laser etched glas blocks similar to this. I want to give it an illumated base to rest on.

The Idea: Wood base with one or two LEDs in it, maybe light blue and amber?

Parts: Link

Name Count Note
3mm ww LED 3 One spare
56 Ohm resistor 2
3m micro USB cable 1 Costs nothing, so better have one spare
microUSB breakout PCB 1 Makes soldering to it easier for 20ct more

Thoughts

Some user input would be nice. Especially on the Banana Pi NAS.
All else is good to go as is.

4 Likes

Just Do It Challenge: Revival Edition
#2

Project 2 - Battery LED Lamp

This is not prototyping, this is tinkering:

Even with a smooth supply voltage and capacitor, it still misbehaves.

2 Likes

#3

Oh, I’m really curious about the Christmas tree LED thing…

3 Likes

#4

Project 1 - LED-Christmas Tree

It is, nothing special:

And in all its 4 pieces:

And the (annoying) color change sequence:

This needs fixing! Make it slow and smooth, less blues, more reds and greens.

2 Likes

#5

Honestly, I thought you gonna build your own…

0 Likes

#6

I have done that at some point.
It is a cone of green LEDs with some reds on it. It kind of sucked while looking crappy.

1 Like

#7

All parts are on order, will arrive soon™
Will update this thread when I get things going.

2 Likes

Just Do It Challenge: Revival Edition