projects:portable-led-bar
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| repo=[[github> | | repo=[[github> | ||
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+ | \\ \\ | ||
+ | === 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: | ||
+ | \\ | ||
+ | {{: | ||
+ | \\ \\ | ||
+ | {{: | ||
- | ====== Rebuilding a mains AC led bar to work with a battery of 18650s | + | \\ \\ |
- | ====== | + | KiCAD files: |
- | by [[people:lepi: | + | [[https:// |
- | ===== Intro ===== | + | Revision 0.1\\ |
+ | {{: | ||
+ | |||
+ | \\ \\ | ||
+ | === Intro === | ||
The purpose of this project is to adapt a 220AC UV LED-Bar to work with 18650 cells. | The purpose of this project is to adapt a 220AC UV LED-Bar to work with 18650 cells. | ||
+ | \\ \\ | ||
I have just started learning electronics, | I have just started learning electronics, | ||
+ | \\ \\ \\ | ||
+ | == Specifications == | ||
- | Specifications: | + | The LED Bar - Light4Me LED UV 8 |
- | + | ^Characteristic | |
- | The LED Bar - Light4Me LED UV 8: | + | |Voltage: |
- | ^Characteristic | + | |Power: |
- | |Voltage: | + | |Light source: |
- | |Power: | + | |Light angle: |
- | |Light source: | + | |Light wavelength: |
- | |Light angle: | + | |Dimensions: |
- | |Light wavelength: | + | |Weight: |
- | |Dimensions: | + | | |
- | |Weight: | + | |LED driver inside (IP65): |
- | + | |Model: | |
- | Cells: | + | |Power: |
+ | |Input: | ||
+ | |Output Voltage: | ||
+ | |Output Current: | ||
+ | |TA: |60 °C | | | ||
+ | |TC: |80 °C | | | ||
+ | \\ | ||
+ | 18650 Cells | ||
^Characteristic | ^Characteristic | ||
- | |Datasheet: | + | |Datasheet: |
- | |TME Symbol: | + | |TME Symbol: |
- | |Rated voltage: | + | |Rated voltage: |
- | |Capacity: | + | |Capacity: |
- | |Maximum current: | + | |Maximum current: |
- | |Charging Method: | + | |Charging Method: |
- | |Charging Voltage: | + | |Charging Voltage: |
- | |Charging Current (standard): | + | |Charging Current (standard): |
- | |Charging Current (max): | + | |Charging Current (max): |
- | |Diameter: | + | |Diameter: |
- | |Length: | + | |Length: |
+ | \\ | ||
+ | Battery charger - Tangspower TP-L8S20 Li-ion charger | ||
+ | ^Characteristic | ||
+ | |Maximum Voltage: | ||
+ | |Charging Current: | ||
+ | \\ \\ \\ | ||
+ | === The Story === | ||
+ | \\ | ||
+ | === Revision 0.1 === | ||
- | Battery charger | + | 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. \\ | |
- | ^Characteristic | + | The LEDs have a " |
- | |Maximum Voltage: | + | \\ \\ |
- | |Charging Current: | + | 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: | ||
+ | - LEDs and cells in parallel | ||
+ | - Operating current would be 0.6 A * 8 = 4.8 A | ||
+ | - Charging | ||
+ | - LEDs and cells in-series | ||
+ | - Operating voltage would have to be 26.9 V (3.36 V / LED) | ||
+ | - Charging | ||
+ | \\ \\ | ||
+ | == Parallel... == | ||
+ | - I have a TP4056 03962A Lithium Battery Charger with protection module | ||
+ | - [[03962A description]](https:// | ||
+ | - [[TP4056Datasheet]](http:// | ||
+ | - 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... == | ||
+ | - 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 | ||
+ | - to put some protection between cells and the cell charger | ||
+ | - 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: === | ||
+ | - Research Emeryth' | ||
+ | - Find a solution to connecting the cells | ||
+ | - decide whether to solder the cells (dangerous, potentially capacity hindering) | ||
+ | - contact weld the cells (I don't have access to a contact welder) | ||
+ | - 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:\\ | ||
+ | - https:// | ||
+ | - https:// | ||
projects/portable-led-bar.1616264020.txt.gz · Last modified: 2021/03/20 18:13 by lepi