THE ANALOG SYNTHESIZER PCB

Description

ANALOG is an analog synthesizer composed of 100% analog circuits.

ANALOG is made up of only very common parts. You can collect all the parts at general electronic parts stores and general mail order sites. Would you like to become an analog synth builder?

 

1.First of all, let's collect parts.

Align the parts in the Parts List below.

You can also collect all parts at general electronic parts stores and general web order sites.

	Value	Package	Parts	Qty
NPN Transistror	2SC1815 Y	TO92-ECB	T1, T2, T3, T4, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16	15
PNP Transistror	2SA1015 Y	TO92-ECB	T5	1
RESISTOR	100k	0207/7	R1, R2, R12, R14, R17, R18, R19, R20, R21, R22, R26, R27, R29, R30, R41, R44, R49, R50, R51, R52	20
RESISTOR	10k	0207/7	R3, R4, R16, R23, R28, R47, R48, R53, R54, R55	10
RESISTOR	1k	0207/7	R6, R7, R8, R9, R10, R11, R13, R15, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R42, R43, R45, R46	22
VR	10k	B25P	R5, R24, R25	3
Potentiometer	10k	16K4	POT1, POT3, POT4, POT5, POT7	5
Potentiometer	1M	16K4	POT2	1
CAPACITOR	1n	C050-024X044	C1, C3	2
CAPACITOR	100n	C050-024X044	C5, C6, C7, C8	4
CAPACITOR	1u	C050-024X044	C2, C9, C10, C11	4
CAPACITOR	10u	C050-024X044	C4, C12, C13	3
OPAMP	LM358N	DIL08	IC1, IC3, IC4, IC5	4
OPAMP(FET)	TL072P	DIL08	IC2	1
SW	TACT SWITCH	B3F-10XX	S1	1
LED3MM	LED	LED3MM	LED	1
OPAMP SOCKET	8P	DIL08		5
3.5mm	JACK		CV_IN, GATE_IN, VCC, VSS	3
Toggle SW	POWER SWITCH			1
006P 9V	BATT SANP			1
KNOB	KNOB			6
HAMMOND CASE	1590BB			1
WIRE	15cm			1

2.Make

①   Referring to the figure, place the electronic components on the board and solder them.

< a thing to note>

            ＊IC and transistors are not soldered directly, but are recommended to use sockets.

Make sure that the parts are  below 230 degrees Celsius and within 10 seconds.

In particular, please note that the operational amplifier is easily damaged by heat.

*POT2 is  a 1MΩ potentiometer, others are 10k.

*Only IC2 is TL072 (high-impedance input type), and LM358 (single-supply type) is used for others.

 

②  About the wiring on the back side

There are multiple putts on the back. Please wire as follows.

VCC                 Connect to the center terminal of the power switch.

VSS                Connect with the negative side of the battery snap.

The positive end of the battery snap is routed to the other side of the power switch.

CV_IN        CV Input terminals (3.5mm jack) to the chip side.

GATE_IN     GATE Input terminals (3.5mm jack) to the chip side.

OUT                Audio output jack (3.5mm jack) to the chip side.

 

<Tips>

If you think it's completed but it doesn't work, try the following.

☑ Try to remelt the solder

→ solder may not be fused to the part

Be careful not to let the temperature rise too high so that the parts do not break.

☑ Make sure the soldered parts are not wrong

☑ Make sure that the wires to the jack are connected to the chip.

 

3.Adjust

VCF Adjustment

(1) Set Cutoff to the minimum value.

(2) Turn R25 to the right until you hear a sound.

(3) Turn R25 to the left and stop immediately after the sound stops. (It is around 12 o'clock.) ）

(4) Turn the cutoff all the way to the right.

(5) Press and hold ENV TRG SW.

(6) Turn R24 to the left.

(7) Turn R24 to the right. Stop immediately after the sound stops changing. (It is around 8 o'clock.) ）

 

VCO Tuning

(1) Connect to the CV device and continue to input the octave pitch.

(2) Adjust R5 until the octave fits. (The approximate direction is from 9 o'clock to 12 o'clock.) ）