Eurorack-PT2399-Delay

DIYSynthMNL·Eurorack-PT2399-Delay·kicad/Eurorack-PT2399-Delay.kicad_sch

Eurorack-PT2399-Delay

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About the Eurorack-PT2399-Delay PCB

Eurorack-PT2399-Delay is an open source PCB design by DIYSynthMNL, published on GitHub. It is a board, with 102 components from 45 distinct parts.

Other key parts include the PT2399, 78M05, TL074, TL072 and TL431LP. By type, the board carries 36 resistors, 31 capacitors, 10 connectors, 7 ICs, 7 diodes and 2 transistors.

It belongs with the audio designs in this gallery.

From the project

A voltage controllable delay/echo module

A Eurorack delay module based on the PT2399 — Princeton Technology's classic karaoke-chip digital delay. ~30 ms to ~340 ms delay range with audible degradation as time stretches (the "lo-fi delay" character that made this chip famous in guitar pedals and DIY modules).

This module adds voltage-controllable delay time (via a Music-Thing-style BJT current source on pin 6), 2 wet outputs + 1 dry output, an Aux input that's normalled to Wet Out 2 for self-feedback (or for routing external effects into the feedback loop), and a feedback overdrive jumper that hard-clips the feedback for chaotic /…

Main components on the Eurorack-PT2399-Delay

PT2399 78M05 TL074 TL072 TL431LP

Eurorack-PT2399-Delay bill of materials (BOM)

102 components, 45 distinct parts.

Qty	Part	Footprint	Refs
1	PT2399	DIP-16_W7.62mm	U1
2	78M05	TO-252-2	U2, U3
1	TL074		U4
2	TL072		U5, U6
1	TL431LP	TO-92_Inline	U7
2	BC547	TO-92_Inline	Q1, Q2
2	EuroPower_JST_3P	Eurorack_power_jst_3P	J1, J10
2	EURO_PWR_16P	IDC-Header_2x08_P2.54mm_Vertical	J2, J11
1	Main_in	AudioJack_3.5mm_long_pads	J3
1	Aux_in	AudioJack_3.5mm_long_pads	J4
1	Time_CV_in	AudioJack_3.5mm_long_pads	J5
1	Wet_out_1	AudioJack_3.5mm_long_pads	J6
1	Wet_out_2	AudioJack_3.5mm_long_pads	J7
1	dry_out	AudioJack_3.5mm_long_pads	J8
1	Jumper_2_Open		JP1
5	100K		RV1, RV2, RV3, RV5, RV8
1	5K		RV4
1	200K		RV6
1	500R		RV7
4	~	D_DO-41_SOD81_P7.62mm_Horizontal_BigPads	D1, D2, D3, D4

Show 25 more

Qty	Part	Footprint	Refs
3	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D5, D6, D7
7	2.2uF	CP_Radial_D5.0mm_P2.50mm	C1, C2, C5, C7, C11, C12, C18
3	100nF	C_Rect_L7.0mm_W2.0mm_P5.00mm_BigPads	C3, C6, C13
3	22uF	CP_Radial_D4.0mm_P1.50mm	C4, C8, C19
2	1uF		C9, C20
7	100nF		C10, C14, C27, C28, C29, C30, C31
2	15nF		C15, C26
1	1nF		C16
1	470pF		C17
1	4.7nF		C21
1	47pF		C22
2	100pF		C23, C24
1	2.2uF		C25
4	*10K	R_quarter_watt_L6.3mm_D2.5mm_P7.62mm	R1, R2, R39, R40
6	10K		R3, R4, R6, R12, R13, R25
2	47K		R5, R7
9	100K		R8, R10, R15, R16, R17, R18, R19, R24 +1
1	39K		R9
3	1M		R11, R26, R28
1	200K		R14
6	1K		R20, R27, R29, R30, R31, R34
1	680R		R21
1	100R		R22
1	680K		R23
1	1.5K		R32

Eurorack-PT2399-Delay design files

The KiCad project lives in the DIYSynthMNL/Eurorack-PT2399-Delay repository on GitHub; these links point at the commit this page was built from.

Schematickicad/Eurorack-PT2399-Delay.kicad_sch

Eurorack-PT2399-Delay: common questions

How many components are on the Eurorack-PT2399-Delay?

102 components, from 45 distinct parts. The full bill of materials is listed on this page.

Where can I download the Eurorack-PT2399-Delay design files?

From the DIYSynthMNL/Eurorack-PT2399-Delay repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the Eurorack-PT2399-Delay design in my own project?

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

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