A keyboard is nothing but an array of switches. Pressing down one switch will allow one of the "free running oscillator" signals to pass towards a mixer which in turn is connected to an audio amplifier or whatever you want it to go to. Free running oscillator means that the circuit is creating the signals and different frequencies the moment the power is turned on. So they are always "there". But you don't hear it, because the signal isn't routed to anything to make it audible. Only once the key is pressed down, the signal gets the chance to get somewhere else as previously mentioned.
Any parts list or mouser carts? I want to make this but am really new to this stuff. Am I incorrect in thinking this is just an IC with some wires and output jacks, with 1 resistor?
A bit of an oversimplification. You need a squarewave source to make your initial frequency, and you use the CD4024 to divide this frequency into many octaves. You can omit the resistor on the master reset pin (2) and just tie it to ground as it serves little function. Check my video on oscillators to get that initial frequency: ua-cam.com/video/fiQebuM3UcU/v-deo.html
@@n0tett Yes as simple as that. But a VCO implies that it's some form of voltage controlled circuit, but any square source will do. Many ways lead to rome.
You will need to send it to an amplifier of some sort if you want to speakers. For example the DIY one I talk about here ua-cam.com/video/oMDkAkQaAhw/v-deo.html
This is such a great series of videos!
Awesome keep them coming!
I gotta spend some time with this IC. Great video! I was wondering how organs dont need a oscillator for each key. Interesting method!
I missed you :')
How do you route the signal from keyboard to the 4024?
A keyboard is nothing but an array of switches. Pressing down one switch will allow one of the "free running oscillator" signals to pass towards a mixer which in turn is connected to an audio amplifier or whatever you want it to go to. Free running oscillator means that the circuit is creating the signals and different frequencies the moment the power is turned on. So they are always "there". But you don't hear it, because the signal isn't routed to anything to make it audible. Only once the key is pressed down, the signal gets the chance to get somewhere else as previously mentioned.
Any parts list or mouser carts? I want to make this but am really new to this stuff. Am I incorrect in thinking this is just an IC with some wires and output jacks, with 1 resistor?
A bit of an oversimplification. You need a squarewave source to make your initial frequency, and you use the CD4024 to divide this frequency into many octaves. You can omit the resistor on the master reset pin (2) and just tie it to ground as it serves little function. Check my video on oscillators to get that initial frequency: ua-cam.com/video/fiQebuM3UcU/v-deo.html
@@trevortjes To be clear, you are talking about an external squarewave source, i.e a VCO correct?
@@n0tett Yes as simple as that. But a VCO implies that it's some form of voltage controlled circuit, but any square source will do. Many ways lead to rome.
How do you output the “sound” generator? Do you connect it to a guitar amplifier?
You will need to send it to an amplifier of some sort if you want to speakers. For example the DIY one I talk about here ua-cam.com/video/oMDkAkQaAhw/v-deo.html
@@trevortjes any chance of connecting it to a female jack so it could be plugged to my Krk monitor?
How can i use it as a guitar Octave pedal?