Wednesday, March 16, 2011

Electronics repair training videos





















Click here to visit Randy Fromm's YouTube page and see more of his great videos.



Randy Fromm's Arcade School offers a wide range of video training programs, from beginning electronics to advanced microprocessor repair.

Randy Fromm's Electronics Repair Guides



Here is a great website to purchase some really good electronics repair guides by Randy Fromm, http://randyfromm.com/shopping/

Randy Fromm's Arcade School offers a wide range of video training programs, from beginning electronics to advanced microprocessor repair.

Here is a list if some of the available programs:

-Randy Fromm's Big Blue Book of Really Great Technical Information
-Randy Fromm's Big Green Book of Monitor Schematics
-All-You-Need Beginning Electronics for Operators and Mechanics
-Basic Videogame Troubleshooting
-Diodes, Transistors & Other Semiconductors
-Switching Regulator Power Supplies (Peter Chou type)
-Conventional Power Supplies
-Videogame Monitor Repair Made Simple
-Using a Digital Multimeter
-Using an Oscilloscope
-Introduction to Digital Electronics
-Troubleshooting Microprocessor Based Systems

Click here for more information and to visit the sales page.

Saturday, March 5, 2011

Typical electrolytic capacitor ESR values


This is a chart showing typical ESR values for good electrolytic capacitors. A faulty capacitor can often have a value that is 10X the value stated on this chart before it starts to cause problems in most circuits, of course this is not always the case and not for all of the capacitance values listed. This is the same ESR chart found on the original Dick Smith ESR meter and the also EVB ESR meter.



Click here to download the ESR chart.

Remember to visit http://www.preher-tech.com and if you have any questions you can email me john@preher-tech.com