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TK – Frequency accuracy
Welcome to the Thursday Toolkit series, about tools for building Physical Computing projects. (this is again a bit of a side excursion, about checking the quality of a measuring instrument) I recently...
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Generating a sine wave
After the recent pretty disappointing results with a transformer-based Component Tester, I’d like to try and generate a ± 10 V sine wave at approximately 50 Hz in some other way. Using as few...
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Generating a sine wave – part 2
After yesterday’s failed attempt to generate a clean since wave, I started experimenting a bit further. How could the Op-amp book be so wrong about the quadrature oscillator circuit? The nice thing...
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A better sine wave
After the pretty bad sine wave trial of the last two days, it’s time to try another circuit: This is a “Phase Shift Oscillator” from the same op-amp book as the other one. I used half a TLV2472. This...
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Producing a beefier signal
Let’s move on, now that we have a clean sine wave. The goal is to produce a ±10V sine wave to use for constructing a Component Tester. The sine wave produced so far was merely ±65 mV. I re-used the...
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TK – Frequency Meter
Welcome to the Thursday Toolkit series, about tools for building Physical Computing projects. Another post about frequencies – this time I’ve assembled a DFD4A from Almost All Digital Electronics: It’s...
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Different op-amps
One last experiment I wanted to do after the recent sine wave circuits, was to compare a few different op-amps. I’m including the original one here as well – the LM358, running at ±13.6V: Here’s the...
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Component Tester quality
Will all this effort to create a good sine wave for use as Component Tester, and all the testing on it, I might as well put the CT to the test which started it all, i.e. the one built into my Hameg...
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