Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
sound_boards:vc_oscillator [2020/11/06 11:25] admin [Voltage Controlled Oscillator] |
sound_boards:vc_oscillator [2020/11/06 12:23] admin [Sync] |
||
---|---|---|---|
Line 2: | Line 2: | ||
This is a small Voltage-Controlled Oscillator - the heart of every analog synthesizer. It provides a square and a triangle wave, and it could be hard synced, too.\\ | This is a small Voltage-Controlled Oscillator - the heart of every analog synthesizer. It provides a square and a triangle wave, and it could be hard synced, too.\\ | ||
+ | |||
+ | {{:sound_boards:vc_oscillator_214607.jpg?400|}}\\ | ||
The OpAmp is a rail to rail [[http://ww1.microchip.com/downloads/en/DeviceDoc/MCP6001-1R-1U-2-4-1-MHz-Low-Power-Op-Amp-DS20001733L.pdf|MCP6002]] from Microchip.\\ | The OpAmp is a rail to rail [[http://ww1.microchip.com/downloads/en/DeviceDoc/MCP6001-1R-1U-2-4-1-MHz-Low-Power-Op-Amp-DS20001733L.pdf|MCP6002]] from Microchip.\\ | ||
- | It is designed for experimental and design use. If one wants to use it as a sound device one should put a resistor and a capacitor to the output:\\ | + | It is designed to use for experimts and development together with a breadboard.\\ |
- | square out----470 Ohm-----||-------Line Out | + | {{:sound_boards:vc_oscillator_214943_rot.jpg?400|}}\\ |
- | | | + | |
- | 120 Ohm | + | |
- | | | + | |
- | GND | + | |
- | \\ | + | |
- | + | ||
- | + | ||
- | + | ||
- | {{:sound_boards:vc_oscillator_214607.jpg?400|}}\\ | + | |
---- | ---- | ||
Line 49: | Line 42: | ||
* **Potentiometers:** | * **Potentiometers:** | ||
* 1x 100 kOhm | * 1x 100 kOhm | ||
+ | |||
+ | ---- | ||
+ | ==== Voltage In ==== | ||
+ | Any voltage between 0-5V at the VIN pin can control the frequency. Without input resistor the potentiometer wont have any effect on the frequency. But depending on the value of the input resistor the potentiometer will change the frequency, too. | ||
+ | |||
+ | Voltage Source-------10 kOhm-------- Voltage In | ||
+ | |||
+ | ---- | ||
+ | ==== Sync ==== | ||
+ | |||
+ | For the Sync input one can use any 0-5V source, but a diode is needed . An additional resistor can decrease the power of the syncing signal.\\ | ||
+ | |||
+ | Sync Source -----/\/\/----->|-----Sync Input | ||
+ | |||
+ | ---- | ||
+ | ==== Output ==== | ||
+ | |||
+ | If one wants to use it as a sound source one needs to attach a resistor and a 47µF capacitor to the output:\\ | ||
+ | + 47µF | ||
+ | square out----470 Ohm-----||-------Line Out | ||
+ | | | ||
+ | 120 Ohm | ||
+ | | | ||
+ | GND | ||
+ | \\ | ||
+ | + 47µF | ||
+ | triangle out----470 Ohm-----||-------Line Out | ||
+ | | | ||
+ | 150 Ohm | ||
+ | | | ||
+ | GND | ||
---- | ---- |