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About andre_teprom

Basic Information

Date of Birth
June 24, 1968 (50)
Areas of Interest
Area of specialization:
Digital Signal Processing, Microcontrollers, Power Electronics, PCB Routing / Layout / SImulation
Optional Info
Biography:
Electronic engineer
Graduated at UFRJ (Brazil) on 1997
Location:
Brazil
Interests:
Woman, Money, Power
Occupation:
Sleep

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Recent Entries

Android client ThingSpeak extension for MIT Application Inventor 2

by andre_teprom on 17th May 2019 at 01:44
The following attached file contains a ThingSpeak client extension that allows one to easily make use of the Read and Write features of the ThingSpeak cloud service provided by MathWorks in such a manner that programmer is able to transparently make use of the service without having to deal with much details of the implementation in the code side. With the App - also attached - you can easily check the extension working on a friendly interface:

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Android client SSH extension for MIT Application Inventor 2

by andre_teprom on 8th May 2019 at 18:18
The following attached file contains an SSH Client extension which I made for my own use, but it may also be useful for users of the MIT Application Inventor 2 (AI2) community, or even to the AppyBuilder community (code intrinsically compatible for the last one, but not tested). This is just the current stage of development, but if you want to get updated revisions, you can get the last released source code at Github.

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Routine for handling 7-seg display on CCS

by andre_teprom on 17th October 2018 at 20:11
The following function may be useful for those who are starting in the microcontroller's world and wish to implement applications using 7-segment display with the CCS compiler in PIC platform. I've used long time ago:

Code:
void Display7seg ( char value )
   {
   char pin=0 ;
   while ( pin< 8 ) 
       {
       if ( SEGMENTCHARS[value ] & ( FIRST_SEGMENT >> pin) ) 
         output_high ( DISPLAY_PINS[pin] ) ;
       else

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Estimating the cost required to resize a 60Hz transformer to comply with 50Hz

by andre_teprom on 7th February 2015 at 16:40
It is a common concern of technicians to adapt equipment manufactured on countries whose frequency of electric public mains differs from its local, so that a modification becomes necessary, but depending on the size of equipment, the cost of the transformer may be the largest when compared to the other devices, and the following study can help determine the feasibility of conducting such a change. Obviously, this also determine if the power sizing is adequate to the load consumption.

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Sizing transformers for AC voltage stabilizers employing series topology

by andre_teprom on 25th June 2014 at 21:58
This article is intended to be a quick guide on calculation of transformers used in AC voltage stabilizers which employes series topology. Such model is rarely used in low power equipments due to the relatively more complex control system required for drive the switching devices, but is specially suitable for employing at high power equipments, on what the weight of a conventional transformer (multi-taped) would be prohibitive, besides the fact that it reaches better resolution in the output compared

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