4015 circuits
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Digital sinewave oscillator
Jun 27th
The digital sinewave generator has the advantage that only few components are needed to generate signals with high amplitude constants and variable within a ver wide range of frequencies. The circuit shown here generates a sinewave signal. Other signal forms can also be generated by changing the values of R1…R8. (more…)
Musical doorbell
Jan 19th
In many cases, a doorbell that sounds off a musical tone is preferable over the common buzz sound. This featured circuit is a musical doorbell. After the button S1 is pressed, a short melody is played. When the button is pressed many times in rapid succession or pressed longer, a different melody is generated and the melody plays longer. (more…)
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