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--- projects:portable-led-bar [2021/03/21 17:08] – lepi
+++ projects:portable-led-bar [2021/03/21 20:57] (current) – lepi
@@ Line 5: / Line 5: @@
  | repo=[[github>lepi00/portable-led-bar]]
 }}
+\\ \\
+=== DISCLAIMER: ===
+=== This is not yet a finished project intended as instructions but only a means to share progress on the project. ===
+=== This might be dangerous to attempt !!! ===
+=== If you attempt to follow any of this, you do it at your own risk. ===
+\\ \\
 === Adapting a mains AC led bar to work with a battery of 18650s ===
 by [[people:lepi:start|lepi]](lepi at-a hackerspace.pl)
+\\
+{{:projects:portable-led-bar_batteries.jpg?direct|}} {{:projects:portable-led-bar_voltage.jpg?direct|}}
+\\ \\
+{{:projects:portable-led-bar_ingredients_r0.1_1024.jpg?direct|}}
-== Intro ==
+\\ \\
+KiCAD files:
+[[https://github.com/lepi00/portable-led-bar/tree/main/kiCAD-portable-led-bar]]
+Revision 0.1\\
+{{:projects:portable-led-bar_kicad_0.1.png?direct|}}
+\\ \\
+=== Intro ===
 The purpose of this project is to adapt a 220AC UV LED-Bar to work with 18650 cells.
+\\ \\
 I have just started learning electronics, and my knowledge is very basic.
+\\ \\ \\
-= Specifications =
+== Specifications ==
 The LED Bar - Light4Me LED UV 8
@@ Line 35: / Line 51: @@
 |TA:                            |60 °C                              | |
 |TC:                            |80 °C                              | |
+\\
-Cells
+ Cells
 ^Characteristic                 ^Value                            ^Notes
 |Datasheet:                     |(https://www.tme.eu/Document/e06617d885c58dfb3fecaf4abbe330c4/ICR18650-26H.pdf)["datasheet"]     | |
@@ Line 49: / Line 65: @@
 |Diameter:                      |18.4 mm                            | |
 |Length:                        |65 mm                              | |
+\\
 Battery charger - Tangspower TP-L8S20 Li-ion charger
 ^Characteristic                 ^Value                              ^Notes
 |Maximum Voltage:               |8 * 4.20 V = 33,6 V                | |
 |Charging Current:              |2 A                                |Passive, PFC filter|
+\\ \\ \\
 === The Story ===
+\\
-== Revision 0.1 ==
+=== Revision 0.1 ===
 A friend of mine performs POI with POI-tails that are neon-yellow. The thing is made to shine in UV light.
-Some AC mains LED bars I have, revealed a lot of space inside the casing profile - more than enough to house 8 18650 cells.
+Some AC mains LED bars I have, revealed a lot of space inside the casing profile - more than enough to house 8 18650 cells.  \\
 The LEDs have a "PowerLed" package soldered in-series upon a pcb with no other elements, but most likely have some resistor inside the package, as multimeter LED tester does not show anything when testing a single LED.
+\\ \\
 Remembering next-to-nothing about Electrical Circuits, I started designing a circuit, that would:
  - Power the LEDs from cells
  - Allow charging the cells without taking them out
  - If possible leave the original charger with mains connection
+\\ \\
 First I considered two solutions:
@@ Line 76: / Line 92: @@
    - Operating voltage would have to be             26.9 V (3.36 V / LED)
    - Charging  voltage would have to be 8 * 4.2 V = 33.6 V
+\\ \\
-Parallel...
+== Parallel... ==
  - I have a TP4056 03962A Lithium Battery Charger with protection module
    - [[03962A description]](https://www.epal.pk/product/tp4056-lithium-battery-charger-with-protection-module/)
@@ Line 83: / Line 99: @@
  - Initially I thought that would be crazy to put 8 of these inside
  - Also wiring LEDs in parallel would if I understand correctly require to put at least 40 cm * 8 = 3.2 m of thick wire - that might be difficult.
+\\ \\
-In-series...
+== In-series... ==
  - A friend informed me to the fact, that I could use an external 33.6V charger which seemed to be easier.
  - And also that I could use LM317 to regulate current out of the cells to LED's
  - I decided to use a I/0/II switch and an IEC cord socket with the original LED driver if possible.
+\\ \\
 Emeryth suggested:
  - to learn more about li-ion cells before I use un-protected or multiple cells
@@ Line 94: / Line 110: @@
  - to use a DC-DC converter instead of LM317 that produces too much heat
  - to rethink if I need all LEDs in-series
+\\ \\
-Next Steps:
+=== Next Steps: ===
- - Research Emeryth's suggestions
+ - Research Emeryth's suggestions\\
  - Find a solution to connecting the cells
    - decide whether to solder the cells (dangerous, potentially capacity hindering)
@@ Line 102: / Line 118: @@
    - design a 3d-printed casing for the cells with springs, that would slide into the LED bar casing
    - remember to discharge cells before in case of soldering
+\\ \\
-Notes:
+Notes:\\
- - https://pl.aliexpress.com/item/1000001962896.html
+ - https://pl.aliexpress.com/item/1000001962896.html\\
  - https://lcamtuf.coredump.cx/electronics/