Sound Logic
This PCB uses a 555 timer and/or schmitt trigger inverters to create tones. Then the tones can be manipulated by using various on-board potentiometers, a binary counter/divider to create multiple sub-octaves, and signals can be combined using NAND gates to create more complex and interesting sounds.
The control voltage pin of the 555 can also be accessed, allowing frequency modulation based on other signals, and with the sliding frequency and pitch, many interesting sounds can be produced.
Note: With the parts in the BOM, the power supply voltage should be 5V to work with the 74HC series chips.
Some parts may be experimented with by removing existing values and soldering alternates in, for example I increased C10 to 1uF and C11 to 10uF electrolytic after a while but the default BOM values are good starting points, depending on desired outcome. That's why some capacitor footprints have polarized markings while the BOM has smaller value non polarized part numbers for default starting points.
Sound Logic
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- Comments(1)
- Likes(5)
- Nenad Kezic Aug 23,2023
- Sebastian Kümmel Feb 03,2020
- Engineer Dec 15,2019
- Engineer Oct 16,2019
- Randolph Harrison Oct 08,2019
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