Sofirn SP10 Pro (AA/14500/Andúril 2) - now available!

LED Flashlights – General Info 1 x AA / 1 x 14500 Flashlights
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Gchart put information on 1 series flashing in his thread

Xplained nano or USB to Serial TTL are the best solutions, with a board like this on which you solder these types of pogo pins