I was thinking of much lighter springs than that
for keys, but the idea could probably be adapted easily to an
electric screwdriver. Lots of torque and low speed for control.
Springs appropriate for keys are not difficult to do by hand,
but frankly, my hand gets cramped even on the small ones as you
have to grip it pretty tightly. I might try the electric
screwdriver myself!
Thanks for that.
Eric KE6US
On 11/28/2019 2:03 PM, Lawrence wrote:
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Found
this on instructables.
73 Lawrence Harris VA7EDU
They aren't difficult to wind. K&S
Metals has small dia. piano wire. Use an ordinary
screw as a form. I usually go with a screw the next
size down from what I want as they tend to unwind a
little. You can also wind them on dowels and bamboo
skewers. I do this often when I need one right away
for development, then replace it later when I have
time as the commercial ones have much nicer finish
winds on the ends.
Eric KE6US
On 11/27/2019 6:36 PM, Mike
Easterbrook wrote:
Thanks for the suggestion
Niels. That was one source of springs I hadn't
thought of. Those that I've checked so far are
either wrong ID for the 3mm screw or wound in wrong
"sense" .
Continuing to look. Closest
I've found is tensioning wire for net curtains but
all I can get here are too small ID
Mike
On Mon, 25 Nov
2019, 19:34 Niels Jalling, <
niels@...>
wrote:
Take a look inside a
ballpen from your pile of old pens.
73 de
OZ9NY Niels
Eric KE6US