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Search results: 358   Output: 61-70
  1. 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 ...
    26-01-2015
  2. 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 ...
    10-12-2014
  3. 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 ...
    18-09-2014
  4. Petre Petrov EDN Many of the sensors capturing information from the world around us are resistive. A few examples are NTC, PTC, LDR, contact sensors. If we convert the resistance of the sensors into frequency or pulse duration, these parameters can ...
    01-08-2014
  5. Jordan Dimitrov EDN Designers often use VFCs (voltage-to-frequency converters) to perform A-to-D conversion in data acquisition systems that require strict monotonic response, high resolution, reduced noise and moderate speed. The VFC produces a ...
    06-05-2014
  6. Peter Demchenko, Vilnius, Lithuania EDN This Design Idea shows how to calculate the inductance of a multilayer air-core coil using only its dimensions and resistance. If you know the dimensions and the number of turns on an air-core coil, you can ...
    13-03-2014
  7. Raju Baddi, Tata Institute of Fundamental Research, Pune, India EDN Part 1 It is sometimes useful to listen to an audio signal at a test-circuit point. The 4069, with its high input impedance and sufficient output drive current of approximately 6.8 ...
    16-02-2014
  8. Raju Baddi, Tata Institute of Fundamental Research EDN This Design Idea describes a simple way that you can use one hex-inverter package of an unbuffered HD14069UB CMOS (Reference 1) to make four test gadgets: a logic probe with well-defined ...
    13-02-2014
  9. Application Note AN143 December 2013 Michel Azarian, Will Ezel Presented is a simple model that can be used to accurately predict the level of reference spurs due to charge pump and/or op amp leakage current in a PLL system. Knowing how to predict ...
    29-12-2013
  10. Raju Baddi EDN This automatic pulse generator (figures 1 and 2) is a test gadget that senses a probed contact to a pair of terminals under test and automatically issues a momentary power pulse to them once proper contact is made. These terminals ...
    06-12-2013
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