USTR Programming Service

The following electronic circuits where found at the Internet or in the published literature, they contains bad design, mistakes, flaws or lack of attention. They represent everything that a designer can do to be called a "lousy designer", it may lead to lose a job position, a prommotion. Lack of attention and revision is the mother or all mistakes, let's pay attention!!!

This list has no intention to damage nobody's name, reputation or a corporation image, it represents only the human natural lack of attention. Even high recognized professionals do mistakes from time to time, even that we don't expect them to go there. Some mistakes can put people's life in jeopardy, while others can cause no harm at all, by just not litting the led on the prototype board.

This list intention is just to alert everyone to pay more attention about their own designs, attention and care from professional or hobby point of view. Evolving and developing is part of the natural human momentum, mistakes make part of such path, without them we would never learn, but we shall never accept mistakes as "normal" or "natural", we should learn from them, not live with them.

If you found some interesting "ouch circuit" to publish here, please email the source circuit image, or URL address, author, where it was found, your name and email, to ouch@ustr.net . Please tell me if you want your name posted or ommited.

VERY MUCH GROUNDED THANK YOU SIR.	001 - Published Dream Machine Application Reference Book, from Philips Semiconductors, 1996, yellow cover. Page 24, author: John P. Keyerleber. Title: Single Chip Caller ID Processor Click HERE to see the error. Found by Wagner Lipnharski and Lucas Hartmann.
THERE WILL BE NO LIGHT MAY BE A REVERSE LIGHT?	002 - Published Dream Machine Application Reference Book, from Philips Semiconductors, 1996, yellow cover. Page 26, author: David J. Stitt. Title: Smart Coin Acceptor Module Click HERE to see the error. Found by Wagner Lipnharski.
COMMON WHAT ??? SENSE ???	003 - Published Dream Machine Application Reference Book, from Philips Semiconductors, 1996, yellow cover. Page 20, author: Paul McElroy. Title: Automotive Pulse Code Reader Click HERE to see the error. Found by Wagner Lipnharski.
SSSSPLATH !!!!! FFFFFFFF SSSSSMOOKING	004 - Published Dream Machine Application Reference Book, from Philips Semiconductors, 1996, yellow cover. Page 30, author: Gordon Gleason & Jerry Horn Title: An Efficient, Digitally Controlled Laboratory Power Supply Click HERE to see the error. Found by Wagner Lipnharski and Luciano Sturaro.
WHEN IN DOUBT READ THE DOCUMENTATION !!! DUHHH, WHOSE?	005 - Published HCPL2201 Very High CMR, Wide VCC Logic, Gated Optocouplers, from Hewlett Packard, found HERE . This is an official HP technical data... hmmm, when in doubt we always MUST read the official documentation... but what if the error is there? Click HERE to see the error. Found by Lucas Hartmann.
OOOPS... WRONG CHIP !!! ALMOST THE SAME? NAH!	006 - Published KENWOOD HamRadio Service Manual TM733A. hmmm, if the chip doesn't work, you may try this, but then, wait, perhaps you should try another, hmmm, well, it depends, it will be wiser to find out by yourself... Kenwood, what a heck??? Click HERE to see the error. Found by Luciano Sturaro.
TURN ON THE TV.... OOPS... HERE GOES THE FUSE BOX AGAIN...	007 - Published Dream Machine Application Reference Book, from Philips Semiconductors, 1996, yellow cover. Page 134, author: Samuil Kerem. Come On, this book. is starting to get on my nerves, so MANNNNY mistakes.... blahh! Title: The TV Cage. Click HERE to see the error. Found by Wagner Lipnharski.
OK, THE PROBLEM IS ON C408... BUT WHICH ONE?	008 - TV LG 29C85 Schematics. C408 appears twice on the diagram. Déjà vu? Be careful if you need to replace this capacitor, you may be replacing the wrong one. Sent by Luciano Sturaro.