User Rank
May I suggest re-engineered by Monkeys - 2 items
mrmikel   1/17/2012 7:22:31 AM
My mechanic showed my some electronics from inside a fuel tank.  Two wires have rubbed on each other and fused together (probably the subject of a made by monkeys column.)  The customer complained that the fuse kept blowing so our repairer replaced it with a self-resettable fuse in a 40 amp circuit.  It takes little imagination to figure out the wires will heat up inside the fuel tank and solve the customers problems for them PERMANTENTLY.  Maybe this would be a case of repaired by murderers!

The second item of re-engineering by monkeys is a transformer replacement in a filament power supply running 480 volts, using a triac as the regulating element.  It has a 480 primary transformer with a 32 volt CT secondary to supply the regulating circuitry.  This is not a standard item anywhere so the repairer figured why not just replace the failed transformer with a 230 volt primary 64 volt secondary. Fine in theory except the matter of insulation, and the matter of 480 creating arcs that are hard to quench. There is also the  fact that this unit is controlled through low voltage control circuits for operator interface, any of which might suddenly break down when 480 volts shorts through to the secondary side.

These fellas must have got their re-engineering degree from Shade Tree University.



Partner Zone
Latest Analysis
We celebrate Halloween with a look at 13 of the scariest technology-based horror movies of all time, as well as some real-life technologies that bare a frightening resemblance to what's on screen.
When Charlie Miller and Chris Valasek made headlines by hacking and crashing a Jeep last year, the event followed many months of study and trials.
A unique set of multi-network servo drives introduced by Mitsubishi Electric enables the company’s servo motion capabilities to be integrated into EtherNet/IP, EtherCAT, or PROFINET networks.
With a better understanding of materials’ response to load and temperature, researchers could potentially use the knowledge to improve design. The research could even help geologists studying plate tectonics.
A panel on cybersecurity at ARM TechCon called for regulations to protect the security of connected devices.
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 10 - 14, Embedded System Design Techniques™: Getting Started Developing Professional Embedded Software
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Course November 8 - 10:
Sponsored by 3M
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service