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PV (solar) Systems - Short circuit failure
Hello Freaks!!! How long?    Guys I've been working with On-Grid PV Systems, all kind of range Powers. After a course last weekend when I saw some bad failures and when...
Friday, 25 January 2019 - 12:59
Humidity and temperature sensor
Hello Freaks... I would like some advice for a humidity and temperature sensor. Temperatures are from 100 to 0 C The problems: - normal wind 28 m/s - maximum wind 30 m/s - dust -...
Thursday, 27 October 2016 - 01:15
Energy Meter Project - ATM90E36A
Hello Freaks... How long?   Freaks I'm looking a project for a Energy Meter board for poly-phase measurement. I'm looking for a partner in this project.  I'm with the...
Monday, 18 July 2016 - 12:28
Power Transformer restart problem - how to avoid
Hello freaks....   First... I wish a happy Christmas...   There is a problem that intrigues me. There is a lot power transformers (12,5 to 25 kV <---> 380 V,...
Thursday, 24 December 2015 - 22:19
PTC wrong resistance
Hey freaks...   I was analyzing a bad board trying to find something wrong.  Something that puzzles me. There is 4 PTC in the board, 2 of them shown the resistance that...
Friday, 2 October 2015 - 00:37
MCP16301 Iout 600 mA?
Hello Freaks...   Doesn't anyone had used the MCP16301 on Iout around 600 mA? Does it goes up to 600 mA or I need the Boost Bias?   The maximum output current that I...
Monday, 22 June 2015 - 18:16
Certification Price and new devices
Hey freaks...   I was thinking about the price to certificate our new radio here in Brazil (ISM band 1W) was expensive and I'll ask to you the price in US or other countries...
Wednesday, 20 May 2015 - 12:18
Piezoeletric energy
Hey freaks... Last month we receive some piezoelectric and we performed some tests to it work as vibration sensor. Then I started to think about some application using the...
Tuesday, 19 May 2015 - 02:51
IoT networks
Hey freaks...   Guys what you are hearing about Sigfox or Weightless? The idea is to create a low-power and low-cost network for IoT, it's really nice...   http://www....
Friday, 15 May 2015 - 18:51
Pcb Panelization
Hey freaks...   Freaks we are trying to produce cheaper PCBs here, Brazil, but another problem we had. We need to create the panel from our PCBs so the manufacture could...
Monday, 4 May 2015 - 19:17
Small ISP connector
Hey guys...   I my last design the board is small (populate IC's  and board size of 4 x 6 cm) then the ISP connector is big in comparison with the board.    I...
Saturday, 18 April 2015 - 14:18
AC Motor and Mosfet Switch
Hey freaks...   In this topic, we discuss about use a Mosfet to switch mains voltage.    Now consider to use that idea in a AC Motor to control its speed, kind of...
Friday, 6 March 2015 - 02:25

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