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102 June 2006
I have a Palm Vx that I want to
use for monitoring, logging, or to
calculate mileage on a scooter. Any
suggestions on the software I could
use and how to use the com port? It
would also be cool to use it as a
speedometer or RPM meter!!
monitors and found the following
info: Hitachi TX36D86VC1CAB; DP/N
000639RD Rev. A00.
I have two JumpDrives and was
wondering if there is a chip to make it
work like a USB JumpDrive MP3
player. I see that they sell them, but I
want to build one. Does anyone have
a schematic or any ideas?
I have a spot welder that I want to
use on delicate metal. The trigger is
not reliable due to its unpredictable
“on” time. Is there a way to build a
timer that would regulate the “on”
time to very short but accurately
repeatable (one shot) bursts?
#6063 Les Wolfe
I have been very successful in
using software to account for contact
bounce in switches when designing
digital microcontroller circuits. But I
recently read a statement in a book
that said switch contact bounce could
"easily be eliminated by the fitting of a
small capacitor" into the circuit. No
details were given. I experimented
for hours at the oscilloscope using a
variety of capacitors, but never came
close to eliminating the contact
bounce. Is anyone familiar with using
a capacitor to eliminate bounce? If so,
how do you determine the value of the
capacitor, and how is it placed into the
circuit in relation to the switch?
#6065 Judy May W1ORO
I recently got hold of some junk
laptops and was hoping to use the
LCD monitors for other applications.
Where can I find schematics or possibly a standard computer interface
that could be hooked to the ribbon
cable? I took apart one of the
I am looking for a circuit or
schematic for a touch switch module
that will work for compact florescent
bulbs; just with OFF/ON and will
operate with the 115 VAC coming
into the lamp. The module should
connect to the metal base of the
lamp to operate.
#6066 Terry Arnall KB6EBZ