Welcome to Electronics And Telecommunications Blog

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Welcome to Electronics And Telecommunications Blog!
I hope this blog will be useful for everyone who love Electronics And Telecommunications.

This blog will tell you everything about CPU, microcontroller, Printed circuit board, robot,...

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Best way to fix SVN error "Could not start external diff program"

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One day you found that the SVN Diff function didn't work, you will see the error "Could not start external diff program" when you try to compare 2 versions of the file (the working item vs the one on repository). This could happen on both Windows and Linux, Mac OS... Don't worry, it's not caused by OS but sometimes due to the update of the diff tool (e.g Beyond Compare 3 is updated to Beyond Compare 4), this makes the link to external diff program in SVN settings not valid anymore. So how to fix this error? Just follow the steps below: 1. Right-click a SVN file (it can be any file with SVN version mark) 2. Select TortoiseSVN -> Settings -> Diff Viewer 3. There are 2 options here: 3.1 You can choose the "TortoiseMerge" to use the SVN default diff tool 3.2 or choose your preferred program by clicking "External" -> Enter path to external diff program 4. Click OK to save all your configuration Now enjoy the convenience of diff fe
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N-Channel MOSFET High-Side Drive: When, Why and How?

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I had previously shown how to drive N-channel MOSFETs in low-side configuration. You can find the tutorial here: http://electel.blogspot.com/2016/12/low-side-mosfet-drive-circuits-and_23.html I’ve been requested to write a tutorial/article regarding high-side MOSFET drive. So, here I’ll talk about N-channel MOSFET high-side drive. Let’s first look at the common low side configuration.  Fig. 1 - N-channel MOSFET configured as low-side switch Now let’s look at a MOSFET configured as a high-side switch. Fig. 2 - N-channel MOSFET configured as high-side switch You can quite easily see the difference between the high-side configuration and the low-side configuration. In the low-side configuration, the load is connected between the drain and +V, while the source is connected to ground. Thus, the gate drive is referenced to ground. So by applying a voltage of >7V (for Power MOSFETs) or >4V (for Logic Level MOSFETs), the MOSFET can be fully turned on. Now let’s talk about the high-side c
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Using the TLP250 Isolated MOSFET Driver - Explanation and Example Circuits

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I’ve already shown how to drive an N-channel MOSFET (or even an IGBT) in both high-side and low-side configurations in a multitude of ways. I’ve also explained the principles of driving the MOSFETs in these configurations. The dedicated drivers I’ve shown so far are the TC427 and IR2110. Some people have requested me to write up on MOSFET drive using the very popular TLP250. And I’ll explain that here. The TLP250, like any driver, has an input stage, an output stage and a power supply connection. What’s special about the TLP250 is that the TLP250 is an optically isolated driver, meaning that the input and output are “optically isolated”. The isolation is optical – the input stage is an LED and the receiving output stage is light sensitive (think “photodetector”). Before delving any further, let’s look at the pin configuration and the truth table. Fig. 1 - TLP250 Pin Configuration Fig. 2 - TLP250 Truth Table Fig. 1 clearly shows the input LED side and the receiving photodetector as well
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