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Circuit Notebook
15 October 2009
Interesting circuit ideas which we have checked but not built and tested. Contributions from
readers are welcome and will be paid for at standard rates.
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Digital Megohm & Leakage Current Meter
13 October 2009
Looking for an electronic megohm and leakage current meter, for quick and easy testing of insulation in wiring and equipment? Here's a new design which allows testing at either 500V or 1000V. It can measure insulation resistances up to 999MΩ and leakage currents to below 1μA. It uses a PIC microcontroller and displays the results on a 2-line LCD panel.
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High-Quality Stereo Digital-To-Analog Converter, Pt.2
08 October 2009
Last month, we introduced our new high-quality Stereo Digital-To-Analog Converter (DAC) and described the circuit. This month, we show you how to build the various modules and make the header cables.
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The Secret World Of Oscilloscope Probes
06 October 2009
Ever wondered how scope probes really work? Most textbooks treat scope probes as a combination of a resistive divider in combination with capacitors to provide an extended frequency response. But as will be revealed, the reality is that they are much more complex in principle. Read on.
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How To Hand-Solder Very Small SMD ICs
02 October 2009
Provided you have the correct tools and a syringe of no-clean flux paste, soldering very small SMDs (eg, TSSOP devices) into place is easier than you think. Here's how to do it.
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Circuit Notebook
25 September 2009
Interesting circuit ideas which we have checked but not built and tested. Contributions from
readers are welcome and will be paid for at standard rates.
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Introducing OLED Displays
19 September 2009
Organic LED technology is now affordable for the hobbyist. In this article, we survey some available OLED screens and modules and give an example for a simple oscilloscope.
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3-Channel UHF Rolling-Code Remote Control, Pt.2
17 September 2009
Last month we introduced our new high security remote control and got as far as completing both the receiver/relay driver and transmitter. This month we'll put it all together and get the two parts talking to each other - securely!
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Autodim Add-On For The 6-Digit GPS Clock
15 September 2009
Here's a low-cost add-on for the Digital GPS Time Display published in the May & June 2009 issues of SILICON CHIP. It senses the ambient light level, so that a modified program running in the display unitÂ’s PIC controller can adjust the LED brightness to a comfortable level - ranging from full brightness when the ambient light level is high down to dim when the ambient light is very low.
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