Computing
WordPress PlugIn – WP Members
The WP-Members membership plugin turns your WordPress site into a membership site. Restrict premium content, create custom registration fields, and more.
Research Links
Engineering
CTR Surplus – Crestline Ohio
Several years back I found some really good deals for our mirror grinding machine project at CTR Surplus. See video below for grinding machine.
They had some heavy duty servo amplifiers and servo motors from out of CAT scan machines. It was a permanent magnet motor that weighed about 100 pounds and had an indexer on it. Super good deals at the time.
Research Links
- CTR Surplus website
- Google:CTR Surplus – Appears it might have had a change of ownership. The prices of JDM Surplus appears to be off the scale.
Engineering
TriVac D60A Vacuum Pump Documentation
Video: Function of TRIVAC rotary vane vacuum pump of Leybold Vacuum
Research Links
- Google: Trivac vacuum pump
- Google: Trivac D60A
- Google: Trivac D60A rebuild kit
- Duniway: D60A Major Rebuild Kit – MAJ-10171K
- PDF – TRIVAC Dual Stage Rotary Vane Pump Manual
- Ebay: d60a vacuum pump
- TriVac website / company is now named: trilliumus.com
Trivac D60A rebuild kit – 257 USD
Math
Intersecting Chord Theorem
This video sets out a puzzle that uses the intersecting chord theorem to solve.
Which led me to a couple of basic geometric properties that I did not explicitly know.
