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Electronics and DIY
High- Frequency Transistor Amplifier Calculator
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An Excel-based, common-emitter and common-collector transistor amplifier calculator for high-frequency operation.

 

 

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Capacitive T Network Calculator
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A capacitive T network calculator in S-math Studio.

 

 

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Diode temperature sensor calibration using Arduino and SHT15 module
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A simple diode or the output of a transistor bias circuit can be used as a rough temperature sensor. For this purpose, a calibration procedure using a precise temperature sensor is recommended. This article shows how to calibrate such a temperature sensing circuit using an Arduino and the SHT15 Sensirion temperature/humidity sensor module.

 

 

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Arduino Astronomical Clock for Automatic Light Control
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My garden features a set of "garden lamps" which I turn-on at night.

 

 

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Electronic Pumpkins
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Just in time for Halloween, an electronic candle driven e-pumpking project.

 

 

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The OscilloCam
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Build a camera adapter for capturing analog oscilloscope screen-shots.

 

 

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Measuring rpm with an Oscilloscope
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A simple technique for measuring rotation speed in rpms using an oscilloscope.

 

 

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New Life for an Old Drill
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Can't find a replacement battery for an old cordless drill? Here's how to adapt a different battery to an old drill giving it a new lease in life.

 

 

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Combining Multiple Resistors to Improve Tolerance
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How combining resistors affects the overall tolerance of the total resistance.

 

 

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Building an ESR Meter
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Building a simple ESR meter for troubleshooting electrolytic capacitors.

 

 

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Karaoke Mixer Reloaded
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A Karaoke mixer and amplifier for the iPhone.

 

 

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Transistor Amplifier Calculator
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An Excel-based transistor amplifier calculator.

 

 

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Praise for the Lo-Z Probe
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Lessons learned on the topic of high-speed signal probing, and how to build a high-bandwidth "Lo-Z" probe for very little money.

 

 

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Karaoke Mixer
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A sound mixer for a YouTube-based Karaoke system.

 

 

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A Dollar Store Voltmeter
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How to make a cheap panel voltmeter from a dollar-store pedometer.

 

 

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Fume Extractor for Your Electronics Workbench
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How to build a fume extractor for your electronics workbench using an old PC power supply.

 

 

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Building an Adjustable Constant Current Load
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Building a constant current "dummy" load. A useful piece of test gear for any electronics lab.

 

 

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LED Fader for Home Lighting Applications
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An LED lighting project with slow fade-in effect and two switchable lighting levels.

 

 

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Battery Operated Light Box
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Build a battery operated light box for photographing small objects.

 

 

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Flood Alarm
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Flooding inside your home can have devastating effects. Protect yourself by building a simple flood alarm.

 

 

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Sound Activated Laser Parking System
 

This is a link to the article I published in the May 2012 edition of the Nuts & Volts magazine: a sound activated, laser parking system.

 

 

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