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Resources by Val Gretchev

A stand-alone power supply for use with vacuum tube amplifiers, radios, and test equipment.
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A display driver module for 8 digits with only 9 lines.
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How to implement a servo motor controller using an inexpensive microcontroller board.
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This article shows how you can design and simulate a microprocessor using simple gates.
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The new specification defines a symmetrical hardware handshaking method by just changing RTS.
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A component that is often overlooked.
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Having fun with logic gate circuits that may be useful.
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Detection of large metal objects (cars) by inductive loop sensors.
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A high efficiency constant current supply based on a switching regulator.
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Transducers 2014-01-08
This article doesn't fit well in any of the categories since it's more philosophical than practical.
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Examples for STM32 2014-01-04
Examples to get you started with MikroElektronika MINI-M4 for STM32 development board.
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