Analog mixer

nehajaykul·analog-mixer·kicad/full_mixer.kicad_pcb

About the Analog mixer PCB

Analog mixer is an open source PCB design by nehajaykul, published on GitHub. It is a 2-layer board measuring 219.5 × 131.5 mm, with 196 components from 28 distinct parts.

Other key parts include the NE5532 and TL072. By type, the board carries 87 resistors, 58 capacitors, 16 ICs, 8 switches, 6 diodes and 5 connectors.

From the project

2-Channel-Analog-DJ-Mixer

A fully analog 2-channel DJ mixer designed from first principles, simulated in LTspice, and laid out in KiCad for JLCPCB fabrication.

[3.5mm Input] → [L+R Sum] → [Sallen-Key HPF] → [SVF EQ Stage 1: 200Hz] → [SVF EQ Stage 2: 4kHz] → [Gain/Trim] → [Channel Fader] → [Crossfader] → [Virtual-Earth Sum] → [Master Output]

- 3-band parametric EQ per channel (HI/MID/LOW) with kill switches - Cascaded Kerwin-Huelsman-Newcomb state-variable filters; Qs chosen for maximum passband flatness - Stage 1: f₀ = 200 Hz, Q = ~1.0 - Stage 2: f₀ = 4 kHz, Q = ~.83 - Reduced summing-node phase cancellation…

Main components on the Analog mixer

NE5532 TL072

Analog mixer bill of materials (BOM)

196 components, 28 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
14	NE5532	DIP-8_W7.62mm	U1, U2, U3, U4, U5, U6, U7, U8 +6
2	TL072	DIP-8_W7.62mm	U15, U16
4	AudioJack3	Jack_3.5mm_CUI_SJ1-3533NG_Horizontal_CircularHoles	J1, J2, J4, J5
1	Barrel_Jack	BarrelJack_CUI_PJ-063AH_Horizontal	J3
1	TMR_6-1223	CONV_TMR_6-1223	PS1
10	50K	Potentiometer_Bourns_PTV09A-1_Single_Vertical	RV1, RV2, RV5, RV6, RV7, RV8, RV9, RV10 +2
2	10K	Potentiometer_Bourns_PTA4543_Single_Slide	RV3, RV4
3	10K	Potentiometer_Bourns_PTV112-4_Dual_Vertical	RV11, RV14, RV15
8	SW_SPST	SW_Push_2P1T_Toggle_CK_PVA1xxH1xxxxxxV2	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8
4	9.1	D_SOD-123	D1, D2, D3, D6
2	D	LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder	D4, D5
44	100n	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C1, C2, C3, C4, C5, C6, C7, C8 +36
4	10n	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C11, C12, C15, C16
9	22u	CP_Radial_D5.0mm_P2.50mm	C55, C56, C57, C58, C59, C60, C61, C62 +1
1	100n	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C64
9	100K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R1, R2, R5, R6, R11, R12, R13, R14 +1
45	10K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R3, R4, R19, R20, R21, R22, R23, R24 +37
3	500	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R7, R8, R70
2	390	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R9, R10
5	3.3K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R15, R16, R17, R18, R62

Show 8 more

Qty	Part	Footprint	Refs
4	8.2K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R31, R33, R47, R49
2	5K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R32, R48
4	3.9K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R39, R41, R55, R57
2	6K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R40, R56
2	47	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R65, R83
1	7.8K	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R68
2	150	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R71, R82
6	100	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R72, R73, R74, R75, R76, R77

Analog mixer design files

The KiCad project lives in the nehajaykul/analog-mixer repository on GitHub; these links point at the commit this page was built from.

Analog mixer: common questions

How big is the Analog mixer PCB?

The Analog mixer measures 219.5 × 131.5 mm, has 2 copper layers and is 1.600198 mm thick.

How many components are on the Analog mixer?

196 components, from 28 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Analog mixer design files?

From the nehajaykul/analog-mixer repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Analog mixer design in my own project?

The repository has no license, so all rights stay with nehajaykul. Use it as a reference, and ask the author before reusing the design.