[SML] 9 volt snap on lights

Duncan Mahoney dmahoney at usc.edu
Tue Dec 27 21:09:07 UTC 2022


Back in the day when these first came out, I decided that I could make my own much less expensively with a 9 volt battery holder, a blocking resistor, and an LED all soldered together.  Then I realized that I could make a more effecient version with a holder for 2 or 3 AA batteries (depending on the LED Vf).

But now those big buckets of "still good" alkaline batteries at the sound table are a thing of the past.  It's all rechargeables...

Duncan


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