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09:51, 19 March 2010 The Sinclair SPJ-1 is a 2-axis, 2 button analogue joystick originally designed for the Sinclair PC200. The PC200 (PC-8) compatibility is also stated in the official [[Original Arnold V Specs]]. The 2 buttons are likely to be digitial.
<gallery caption="SPJ-1 Sinclar Professional Joystick">
Image:Joystick SPJ-1 with Box.jpg|SPJ-1 with Box
Image:Joystick SPJ-1 Booklet.jpg|SPJ-1 Booklet
</gallery>
The SPJ-1 (Sinclair Professional Joystick) was produced to accompany [[Amstrad]]'s unsuccessful Sinclair PC200 (an old PC with 8086 processor). The SPJ-1 was a fully-fledged analogue joystick, with potentiometers used to measure input (rather than switches as in its digital precessors). It was probably a rebadged PC-standard device. The SPJ-1 was, like its host machine, a flop, and today appears to be exceptionally rare.