ASKotec Tutorials - DIY Simple analog synth


Author avatarjmeisner001@gmail.com | Last edit 9/12/2019 by Clementflipo

ASKotec Tutorials - DIY Simple analog synth SimpleSynth LookMumNoComputer 1.jpg

Introduction

This simple diy analog synth is part of an upcoming series of little projects, that can be used to learn about basic electronics, while having fun with the result.

As the synth has a chip socket, you will be able to change the pitch range of the sound through different capacitors. Just change it on the fly, or keep it and build several of these synths.

You can use sound effect software like http://rakarrack.sourceforge.net/. Check out the video!

There will be build-up tutorials in the future. Have fun!


https://openculture.agency/outcomes/askotec/

Video overview

Materials

  • 1k Resistor
  • 100k Resistor
  • Transistor SS9018HBU TO-92
  • 10k Potentiometer
  • LED Diode
  • Capacitors (smaller value higher pitch)
  • Wires (2 Colors)
  • Prototype Board
  • Battery Connector (and 9V Battery)
  • Mini Jack Audio Socket
  • 8 Pin RoHS PCB IC Socket

Tools


  • Soldering iron
  • Soldering wire
  • Soldering grease
  • Marker
  • Sucker
  • Pliers

Step 1 - Mark Prototype Board

  1. Take your time and look at the schematic. Start with + and run through the different ways till you end back to - pole
  2. The second image shows you the pins you are going to use
  3. Go and mark all pins on your board


Step 2 - Solder Basic Components To Board

  1. Take each basic component and put it onto the marked place (You might need to use some tape to hold the elements in place)
  2. Check, if + of LED is on the shown side
  3. Solder each part on the board...DO NOT CUT THE LEGS, WE NEED IT!!!
  4. Bend the legs like it is shown in the second image



Step 3 - Bridge Potentiometer Channels

  1. Cut the overlapping part of the leg shown in the picture
  2. Bend the piece like an wide U, and put it into the place at the potentiomenter
  3. Solder the U to bridge the channels



Step 4 - Wire 1

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally



Step 5 - Wire 2

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally



Step 6 - Wire 3

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally



Step 7 - Wire 4

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally



Step 8 - Wire 5

Here you need to take of a bigger piece of the wires isolation, so you can then use it to get to the jack sockets ground pin on the other side. Check the second image

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally



Step 9 - Solder component legs

Now use the legs of the basic soldered components, and connect it like shown in the image



Step 10 - Solder DC Connector

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally




Step 11 - Create Safety Strap

  • Solder the wire as shown
  • Using this prototype board, you will need to connect wires to the soldered elements directly
  • Compare the schematic with the photos to see which pins need to be connected
  • Be careful not to bridge other pins accidentally




Step 12 - Prepare moveable elements

  1. Cut off the middle leg of the Transistor SS9018HBU TO-92, and plug it into the socket left 1st and 3rd
  2. Plug in the first capacitor into the socket right, with + in the 1st and - in the 4th
  3. Plug in an audio cable to an amplified speaker, or laptop
  4. Connect the battery


FINISHED! OFF YOU GO, AND HAVE FUN WITH YOUR LITTLE SYNTH!!!


Remember. If you change the capacitor size, you will have different pitch ranges.




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