simple-spectro
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voltage for UV led
3.3v is not enough. We could generate -3v3 using:
"Switched-Capacitor Voltage Inverters"
http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=tps60401&fileType=pdf https://datasheets.maximintegrated.com/en/ds/MAX1719-MAX1721.pdf
TPS60400 was bought (30 pcs)