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Search results: 345   Output: 41-50
  1. Gyula Dioszegi EDN In 1971, Signetics later Philips introduced the NE555 timer, and manufacturers are still producing more than 1 billion of them a year. By adding a few components to the NE555, you can build a simple voltage-to-frequency converter ...
    Circuits » Analogue Design · Measurement » Philips » NE555, TL071
  2. Have you ever been curious about the power consumption of an appliance? For example did you wonder how much it will cost you to leave your television in standby mode whole night? Or did you want to learn how much change your refrigerator settings ...
    Circuits » Measurement · Digital » Microchip » PIC18F252
  3. Jordan Dimitrov EDN While most carbon dioxide sensors use IR technology, electrochemical sensors are a serious competitor because of their high sensitivity, wide measurement range, and low price. As a rule, electrochemical sensors connect to a ...
  4. Robert Kong Embedded Developer, September 2014 This application note describes how to digitize analog sensors and how to transmit their values wirelessly using the NXP configurable tiny logic gates 74AXP1G57 (see Appendix). The ability of these ...
  5. Josef Valasek EDN If you develop an application on a small microcontroller, your diagnostic tools for debugging of the program code might be very limited. This Design Idea introduces a simple debugging routine for plotting the binary value of one ...
  6. Larry Beaty, Beatys Mills EDN This Design Idea came about as a result of my not having access to those wonderful new ICs that sense current. I needed a discrete circuit that I could build easily but that would still be as accurate as the new ICs. ...
  7. Louis Vlemincq EDN This instrument determines the Q (quality factor) of a resonant circuit, crystal, or resonator by measuring its series resistance at the resonance frequency. The Q is linked to the series resistance by two simple equations (R S ...
  8. Mark Bieger EDN I often have to get a reasonably accurate temperature measurement for a laser, transistor, or printed circuit board. I usually use a thermistor for my temperature sensor because they are inexpensive. However, the thermistor’s ...
  9. James Wood EDN The Design Idea in Figure 1 indicates a low-battery condition in an audio test instrument that is powered by four AA cells. As the instrument was otherwise an all-discrete design, this same approach seemed more in keeping with the ...
  10. Francesc Casanellas EDN This Design Idea presents a very accurate, yet very inexpensive, capacitance meter. It was specifically designed for measurements of low value capacitance with an accuracy of better than 1 pF for a gasoline capacitive level ...

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