Get off the grid. Cut the cord. How to drive a high-CRI COB LED from a rechargeable 11,1V Li-Ion battery for 12 hours at full brightness
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€ 35,00 ENERpower 3S2P 11,1V 6900 mAh Li-Ion battery € 16,00 ENERpower 3S (12,6V) 11,1V 3A Li-Ion charger € 22,00 pcb components LED Slave V4 CC-PSU € 4,00 CITIZEN CLU701-0303C4-303H5K2 LED € 1,00 3M 8810 thermally conductive adhesive tape € 7,00 fischer elektronik ICK LED R 33 x 16,5 G heat-sink € 1,00 Tactile button momentary switch or € 2,00 PIHER PC16SH-10IP06472B2020MTA pot. log. 4,7k € 1,00 2,1mm DC barrel-jack, 2,1mm DC plug € 87,00
CC-PSU https://pcb-components.de/anleitungen/LedSlavePWM.pdf
LED http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_HI_ver2/CLU701-0303C4_0035P_201710.pdf
Thermally conductive tape https://multimedia.3m.com/mws/media/122119O/3m-thermally-conductive-adhesive-transfer-tapes-8800-series.pdf
Heat-sink https://www.fischerelektronik.de/web_fischer/de_DE/Kühlkörper/B03.1/Kühlkörper%20für%20LED/PG/ICKLEDR033x16.5G/search.xhtml
Heat sink calculations https://www.led-heatsink.com/thermal-calculation
Tactile switch https://omronfs.omron.com/en_US/ecb/products/pdf/en-b3f.pdf
Potentiometer https://www.piher.net/piher-nacesa.com/pdf/20-PC16v03.pdf