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Unanswered Questions

BJT Transistors June 2012

How do you measure BJT hybrid parameters HF, HI, HO, and HR?

Jose Perez
Guaynabo, PR

Solar LED Illumination June 2012

For several years, we have used a solar yellow LED deck lamp as a "Welcome Light" for our camper — the 12V "patio light" is just too bright, and ruins the moment. I would like to have a simple NiMH/NiCad amber LED light that would be charged via solar, but also from the 12V onboard power when available. I also need an on/off switch for the LED.

# 6121
William Hogan
West Lafayette, IN

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