DIY Pneumatic Halloween Prop, the Spider Leaper

Another DIY pneumatic Halloween prop, the Spider Leaper, to add to the collection.
I wanted to expand on the spider portion of our haunt this year and decided to add a pneumatic jumping spider. I hope to add a spitter to him as well before Halloween. Many thanks to Ron at Halloween Overload – for all his help.
I gave some of the measurements in the video but are some additional ones I missed.
The back upright is 30" and the front one is 32".
I used 1×2 inch tubing for the base and the 2 uprights that the nose of the cylinder attach to and 1 inch square tubing for the center rail, both the pivoting uprights and for the extender that the spider attaches to.
The pivoting uprights are 7 3/4 inches apart on center of the bolts on the bottom and 5 1/2 inches apart where they connect to the extension rod.
The nose of the cylinder is 5 1/2 inches up from the base and the hole where the rod end of the cylinder attaches to the pivot rod is 10 1/2 inches from the end that attaches to the base.
The cylinder is a double acting, universal mount, 1 1/2 bore with a 10 inch throw.
For those interested in how to use a Picaxe to drive 12V components, check out this video by stevepss –

If you liked this video and want more info on building pneumatic props, make sure to check out the playlist on all the pneumatic prop videos at

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