.. OLED display module. Figure 4. The microcontroller section of the circuit. PCB layout Figure 5. PCB layout of the AC energy meter circuit. Figure 5 shows the PCB layout of the design. It’s a two-layer PCB board with a mixture of SMD ...
.. Tuning the radio to somewhere in the 7-7.3 MHz range in the late afternoon and evening should pull in stations in the 40-meter amateur band. If the signal sounds distorted, trying increasing the BFO level and the fidelity should improve. ...
.. flexibility makes them highly handy in other contexts, including industrial applications like monitoring turbine-type flow meter flow rate and small motor tachometry. Figure 1’s facile conversion of a frequency input to a universal ...
.. Then install the ferrite cores in place (in the bobbin) and measure the inductance of the primary winding using an LCR meter. If you can select the measurement frequency on your LCR meter, the best frequency is 65 kHz (switching ...
.. of millivolts. (The fine copper wire used to connect the module to the outside world has a resistance of about 1 Ω per meter.) Q1 drops ~1.3 V and so provides about a third of the heating, rather like the corresponding device in Part 1. ...
.. thermistors to your system by adding an external resistor divider. Reference Klaper, Martin, and Heinz Mathis, 2-Pound RLC Meter impedance measurement using a sound card, Elektor, June 2008, pg 64. Downloads Source code Java executable
.. fat power traces and long, thin signal ones while probing for continuity or shorts on a PCB without needing to look at a meter. This is simpler than it initially looks, so let’s dismantle it. R1 feeds the test probes. If they are ...
.. Then put the ferrite cores in place (in the bobbin) and measure the inductance of the primary winding using an LCR meter. If you can set the measurement frequency on your LCR meter, the best frequency is 65 kHz (switching frequency ...
.. that indicate analog levels via a moving-pointer meter, a numeric display, or a column of LEDs typically occupy considerable panel area and require more than a casual ...
.. was that the output voltage range for both measurements needed to be the same: 0 5 V. This was so that a moving coil meter readout could be used with a single range. See Figure 4 for the implementation. Figure 4. A circuit with the ...