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Drawdio pencil synth buildguide, v1 2019
The Drawdio makes sound by using the conductive proporties of graphite. One end of the synth is
connected to the pencil's graphite core, the other end is connected to you. The resistance of your
drawing makes higher or lower pitches; making music!
1: Resistors
Start with sorting the resistors.
R1 = 300K "brown-orange-black-black-orange"
R2 = 10K "small blue resistor"
R3 = 10R "brown-black-black-gold-brown"
R4 = 22M "red-red-blue-gold' - this is the unmarked light brown resistor!
Bend the resistor legs at 90 degrees on both sides and insert them in the right locations. Solder!
2: Small Capacitors:
Insert the capacitors in place:
C1: 100nF
C2: 680pF (you might need to bend the legs a bit on this one)
Solder!
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Summary of Contents for Reverselandfill Drawdio
- Page 1 Drawdio pencil synth buildguide, v1 2019 The Drawdio makes sound by using the conductive proporties of graphite. One end of the synth is connected to the pencil's graphite core, the other end is connected to you. The resistance of your drawing makes higher or lower pitches;...
- Page 2 3: IC Take the TLC551 out of the foam. The IC has a black dot. On the PCB you see U1 with white dot. Insert the IC and make sure both dots are in the same location (upper left) Solder one pin of the IC. Flip the PCB and check if the IC is all the way in and laying flat to the PCB.
- Page 3 5: Speaker Melt some tin on the two large pads like so: Lay the speaker upside down on the table and add some solder to the four pads: Now place the speaker on the PCB and carefully reheat the pads. They should flow together: Note: if you have trouble with this, look at the end of this document for another solution!
- Page 4 6: First test! Insert the batteryholder. The side with the spring should go in the AAA- hole. Don't solder yet! Now insert the battery. Test the synth by holding both ends of the pcb with your fingers. You should hear a BEEP sound! If not, recheck your soldering and the steps above.
- Page 5 You can also add some solder to the edge of the PCB where the copper tape sticks to the pencil to reinforce the copper tape. Note: If this turns out to be too difficult, use the included piece of purple wire instead. Strip both ends and solder one end the the pcb.
- Page 6 Connect them to the SPK- and SPK+ holes on the PCB and solder them into place. Note that it does not matter which wire connects to the + and the - 2019 www.reverselandfill.org CC share alike credits: Adafruit.com Modified pcb layout by reverselandfill...
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