Imported from GitHub: awonak/synthcard · commit a74c284 · license GPL-3.0

Description

Synth Card for Adam Wonak

README

SynthCard

Synth Card for Adam Wonak

This synthcard is a circuit inspired by Hagiwo's SyncLFO and Bezier Curve, and the Modulove MVMNT. I chose this design because of the seemingly endless creative firmware scripts I have written for the Modulove Sync LFO, so I wanted to make a business card to highlight this circuit design with some fun tweaks.

This is an iteration of the SynthCard.com community from Benjie Jiao.

Demo Videos

4 Step Sequencer - https://youtu.be/5_vGYVA8IQ8

ADSR - https://youtu.be/wfQtB7HLKf4

Synth Card Built by Friends

[@benjiaomodular] - https://youtube.com/shorts/xnUs8CACG_8

[@bildpunkt] - https://youtu.be/3e_gjm9oc40

Bill of Materials

To assist with assembly, you can use the interactive ibom.html page to view a part placement guide.

Reference(s)	Qty	Value	Supplier Link
C1, C2, C3, C4, C5	5	0.1uF Capacitor	https://www.mouser.com/ProductDetail/594-K104M15X7RF53L2
C6	1	4.7uF Capacitor	https://www.mouser.com/ProductDetail/810-FG14X5R1H475KRT6
D1, D2, D3, D4, D5, D6	6	1N5817 Schottky Diode	https://www.mouser.com/ProductDetail/833-1N5817-TP
D7	1	3MM LED	https://www.mouser.com/ProductDetail/604-WP3A8ID
R1, R2, R3, R4	4	1K Resistor	https://www.mouser.com/ProductDetail/660-MF1-4DCT52R1001F
R11, R12, R13, R14	4	1K Resistor (LED Brightness)	https://www.mouser.com/ProductDetail/660-MF1-4DCT52R1001F
R5, R7	2	10k Resistor	https://www.mouser.com/ProductDetail/660-MF1-4DCT52R1002F
R6, R8	2	100k Resistor	https://www.mouser.com/ProductDetail/660-MF1-4D52R1003F
R9	1	22k Resistor	https://www.mouser.com/ProductDetail/660-MF1-4DCT52R2202F
R10	1	470 Resistor	https://www.mouser.com/ProductDetail/660-MF1-4DCT52R4700F
VR1, VR2, VR3, VR4	4	20MM Slide Potentiometer 100K	https://www.mouser.com/ProductDetail/652-PTL20-15R0-104B1
J3, J4, J5	1	Thonkiconn 3.5mm Mono Jack	https://www.thonk.co.uk/shop/thonkiconn/
A1	1	Arduino Nano	https://www.amazon.com/...

Pinout

Arduino Pin	Function
A0	Slider 1 Input
A1	Slider 2 Input
A2	Slider 3 Input
A3	Slider 4 Input
A7	Analog Input
D3	Slider 4 LED
D5	Slider 3 LED
D6	Slider 2 LED
D9	Slider 1 LED
D10	Digital Output
D11	Digital Input

Code Example

The most basic program we can write for the Synth Card is a Blink program. Using the pin guide above, we can see the digital output is D10 which has an LED connected to the circuit. We can use this pin to blink the LED.

#define CV_OUT 10  // CV Output with LED

void setup() {
  pinMode(CV_OUT, OUTPUT);
}

void loop() {
  digitalWrite(CV_OUT, HIGH);
  delay(500);
  digitalWrite(CV_OUT, LOW);
  delay(500);
}

To test out all of the inputs, outputs, and LEDs, you can flash the HardwareTest script.

To see additional example firmware scripts, head over to firmware.

Hardware Revision History

Revision	Date	Notes
ver0.3	2024-01-07	- Change: minor silkscreen updates - Change: made 5v trace larger
ver0.2	2023-12-28	- Fix: CV Output circuit was backwards - Change: Rename capacitor footprint values - Change: Improved LED footprint values - Change: Add linktr.ee and social logos
ver0.1	2023-12-18	Initial release

Enclosure

• Case: OnShape 3D printer case design
• Cover: OnShape 3D printer cover design (Designed by BbartokK)

Buy a SynthCard Kit