Touch Switch II kit
11/28/2007 - back in stock
![[Touch Switch II circuit board picture - click for larger view of board ]](tousw2sm.jpg)
two touch switches, can be used as an iambic keyer paddle
capacitive circuit - no "dry finger" problems of
conductivity circuits
based on a
design
by John Simonton of PAIA Electronics
requires a source of power up to 14 volts (9V battery is fine)
includes a battery saver circuit, which can be bypassed
kit includes circuit board & components shown
add your metal enclosure, jacks, power connector and touch pads
Size is 1.3 x 1.5 inches - fits into a candy tin with room to spare
Price (no printed documentation) is $8.50 plus $3.00 shipping/handling in USA
Add $3 to above price for Worldwide (DX) orders
Printed manuals available for an additional charge or save money by downloading
(Right click/save target as)
and printing the manual ,
schematic ,
parts Placement diagrams and
hookup diagram
Q & A
Why another touch paddle (switch) ?
This one offers better performance than the Touch Paddle kit at the
price of more complexity, higher price and higher power usage. The
Touch Switch II also uses a clocked circuit which may emit some
noticeable signals when it is active.
Does the Touch Switch II kit solve
the age old "dry fingers during the winter" syndrome common to touch
paddle circuits ?
Yes, the Touch Switch II uses a capacitive circuit that will function
with touch plates that are completely insulated. However, I have noticed that
I need to touch the metal enclosure with my other hand when the Touch
Switch II is operated in a non-grounded situation from batteries.
How is the Touch Paddle kit powered ?
From a power source up to 14 volts, a 9V battery will work fine.
A battery saving circuit was
added but it can be bypassed if the kit is powered from a station
supply.
Print out a Kit
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Downloadable files for the Touch Switch II kit
The Acrobat files of complex diagrams (like the schematic) may not
view well on your computer screen - suggestion: use the magnifier to zoom in
for better detail or print out the file.
Touchs2s.pdf (k) - an Acrobat file of the Touch Switch II schematic
Touchs2.pdf (k) - an Acrobat file of the Touch Switch II manual
Touchsw2.pdf (k) - an Acrobat file of the Touch Switch II parts placement diagram
Touchshu.pdf (k) - an Acrobat file of the Touch Switch II hookup diagram
Page accesses: 
![[Touch Switch II circuit board picture - click for larger view of board ]](tousw2.jpg)