From: J. G. Locke (lockejg@redshift.com)
Date: Thu Nov 04 1999 - 05:27:07 PST
From: "J. G. Locke" <lockejg@redshift.com> Subject: RE: Pinhole Digest #280 - 11/04/99 Date: Thu, 4 Nov 1999 05:27:07 -0800 Message-ID: <000001bf26c8$4ace1e00$3430c8d8@daddys-machine>
I use a 1" diameter glass tube about 18" long. It has two pieces of sheet
copper rubber banded to each side of one end to serve as electric switch
contacts. As a switch bar, a piece of light copper wire is bent to clip
between the contacts.
The projectile is a short piece of wooden dowel which is propelled by
lung-power (blowgun).
The switch is in series with a 6 volt power supply and an electromagnet
which is attached to the ceiling. The monkey is stuck to the magnet with a
small metal cap.
When the projectile passes through the switch, it knocks the light copper
wire off the contacts, thus breaking the circuit and dropping the monkey.
With a piece of thread, tether the light copper wire to the glass blowgun so
that it doesn't get lost.
John
||
|| Subject: Help! Need Monkey Gun design
|| From: <Chemnerd2@aol.com>
|| Date: Wed, 3 Nov 1999 04:54:13 EST
||
|| Does anyone have a good monkey gun design? Would like to use
|| PVC. Thanks!
||
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