Hej,
nice to see there’s not only flashlighters around, but also lanternists; a small but growing minority, I hope ; )
I am about to build three small, lightweight and minimalist lanterns. For each I bought…
1. Cree® XLamp® XP-L LED - XPLAWT-00-0000-000UU30E7 - 3000K, 320lm, CRI 90, 1050mA, 2.95V & matching MCPCB & matching Fischer fcool heat-sink
2. OLIMEX Li-Ion rechargeable battery - 1s, 3.7V, 3000mAh / 1s, 3.7V, 7000mAh
3. TP4056 USB 3.7V Li-Ion single cell charger with micro-USB / Adafruit USB DC Solar Lithium Ion/Polymer charger v2
…but now I need a constant current driver.
I’ve seen in the flashlight section that the AMC7135 seems to be a popular choice for those like me who can’t design their own circuitry with TI or Analog Devices ICs that only come in DFN-packages or similar. My question is should I buy one of these ready-made drivers, a better made and/or more reliable version of that if that exists, or if it is better making my own and learning something in the process?
All I need is four slider switch or momentary tactile switch button settings/modes like off, low, medium and high; ideally logarithmically spaced, because of human brightness perception; if that’s too tricky, linear will do for starters.
Any suggestions much appreciated!
PS: Once this works, I like to build a brighter 9V version of it, with based on the CITIZEN - CLU701-0303C4-303H5K2 - 3000K, 505lm, CRI 90, 525mA, 9.4V, 4.7W powered from an EnerPower 3s2p - 11.1V, 5500mAh with a MEAN WELL LDB-500LW - 500mA, Vin 6-30V, logarithmically PWM dimmable via an Adafruit Trinket most likely.