HP/Agilent 16700A 16702A Logic Analyzer Modification

The HP16700x series of logic analyzers are known for being picky regarding keyboard and mouse attached. Below is a simple modification which allows the analyzer running with almost any PS/2 keyboard and mouse.
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Published 11.9.2015


Tektronix TDS 220 Maximum Synchronization Frequency

It is almost unbelievable but the maximum frequency the TDS220 100MHz oscilloscope synchronizes to is 186 MHz. Amplitude of the signal shown is significantly lowered, of course. Published 25.4.2005


OrCAD Tutorials

I have discovered a nice set of OrCAD tutorials. For those who don't know, OrCAD is a CAD system for electronic design. All designs at vanka.net were created with this powerful CAD.
The tutorials are "dynamic" (authors still work on them) and I have got a permission to link them from here.

Schematic Entry in OrCAD
Starting a New Schematic Entry in OrCAD Capture
Creating Schematic Symbols in OrCAD Capture
Preparing for OrCAD Layout
Starting Layout in OrCAD
Creating a Schematic Parts Library in OrCAD
Archiving Your Design in OrCAD
Printed Circuit Boards (PCBs)
Published 11.10.2004


MC34063A Switching Regulator Experience

Some time ago when I was looking for a suitable power supply for our relay board, my eye stopped on MC34063A switching regulator. The MC34063A is considered rather an obsolete part however what makes it really interesting is its price. For less than $1 you get complete +5V/0.5A switching power supply controller and the only thing that you need to do in order to build a step down converter is to add a coil, diode, three resistors and three capacitors. And this is exactly what I did.
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Published 27.9.2004


NetPrint - Debug Over Ethernet

Every designer needs sooner or later to know, what is going on inside the device he is designing. The simplest possibility which can be used on almost every microcontroller is outputting the debug information over one of its serial lines. But what to do if all of them are busy?
The answer is simple. Debug over Ethernet!
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Published 25.8.2004


AVR JTAG MICRO ICE MINI HOWTO

AVR JTAG MICRO ICE is a device used to program and debug Atmel's AVR microcontrollers with built in JTAG interface (typically all ATmegas 16 and up). It is very useful for rapid application development - it is like a microscope which can be used for viewing what is going on inside a microcontroller. Variables watching, stepping, breakpoints, all of this speeds up development cycle, especially when something goes the way we don't expect.
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Published 20.7.2004




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