Watson A.Name - Watt Sun said:
Very true, I'd expect such is the case as well being that the LM386 isn't
exactly "high power"!!!!
Say, will you continue with your flashlights?
Um, which one? In the last few weeks I've built a couple in "Coffee
Mints" tins. They hold three 5 mm Nichias with the Radio Shack 270-
412 three AAA cell batt holder, which was so new that some stores
still had them stuck in the back in the shipping cartons. I had to
file/sand down the holder to fit into the tin. Once that was done,
three holes for the LEDs and a hole for a submini toggle switch.
Three 33 ohm resistors, one for each LED, connected to the switch.
The thing is about as compact as it can get. There's very little
unused room inside.
I was wondering what the
goal is, draining the battery completely or using only one cell or both.
Can you draw up your final design note and scan them, I'll pretty it up
for you.
Picture's worth a thousand words. I'll repost the latest one in a new
thread. My goal was to make a flashlight that was conveniently sized
and used parts the average hobbyist could obtain. About the only hard
thing to get were the LEDs. Another goal was to stay away from exotic
batteries, use only AA or AAA cells which are dirt cheap. I got
(limit 5 per customer) 5 packs of four GE/Sanyo AA alkaline cells for
89 cents each. That's less than half the usual 50 cent price. The
trend of using those CR-123 lithium cells for flashlights has brought
the price down somewhat because of volume, but you still can't find
them on the usual supermarket shelves. And IMHO still too expensive
for the average worker bee.
My later Velamints tin lights had improvements that weren't in the
early ones, so it's impossible to say where the final design is. This
is a hobbyist newsgroup for DIYers, not a manufacturing ng. I would
expect each hobbyist to have his own way of doing things, with a
general idea of his final goal. I appreciate the inspiration that
others have given me and Ed Ngai, who hasn't been seen here lately. I
hope he's still pursuing his projects.
Later. I have to dig out that pic and post it to the
alt.binaries.schematics.electronic newsgroup.
--
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