Precision ADSR generator

Precision ADSR generator

Modified version of Yves Usson's Yusynth ADSR envelope generator by Caspar Ockeloen-Korppi

Overview

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Bill of materials

Description

This is a modified version of Yves Usson's Yusynth ADSR envelope generator, which is in turn based on an 1980 article by Jonathan Jacky and similar to the design published by René Schmitz. The design is based around a 7555 timer (a CMOS version of the classic 555) to provide the logic, and three diodes to guide the charging (attack) and discharging (decay, release) currents of the timing capacitor through different potentiometers.

Files

Project schematics / Precision ADSR generator
Title Version Creation date Copyright notice Software Download link
Оригинальная версия

Оригинальная принципиальная схема получена из открытого источника находящегося по адресу: https://kassu2000.blogspot.com/2015/05/precision-adsr.html

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Панель (оригинальная версия)

Панель (оригинальная версия)

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Bill of materials

Оригинальная версия
# Value Quantity Designator Comment
Semiconductors
1 1N4148 5 D1, D2, D3, D4, D5
2 BC547C 3 Q1, Q2, Q3
3 ICM7555 1 U1
4 TL074 1 U2
Resistors
1 1M 2 R1, R2
2 100R 3 R10, R12, R8
3 4k7 3 R15, R17, R19
4 1k 2 R16, R18
5 10k 1 R20
6 47k 2 R21, R3
7 22k 3 R4, R6, R7
8 10R 1 R5
Capacitors
1 1nF 1 C1
2 10nF 1 C2
3 10uF 2 C24, C30
4 1uF/Tant 1 C3
5 .1uF 1 C6
Inductances
1 Ind 2 L1, L2
Connecters
1 3.96/3P 1 J1
2 2.54/4P 1 J10
3 2.54/3P 1 J3
4 2.54/2P 6 J4, J5, J6, J7, J8, J9
Панель (оригинальная версия)
# Value Quantity Designator Comment
Semiconductors
1 Red LED 1 D1
Variable Resistors
1 1M Log 4 VR1, VR2, VR3, VR4
Other
1 2.54/2P 6 J1, J11, J2, J4, J5, J9
2 Jack In 3 J10, J3, J7
3 2.54/4P 1 J6
4 2.54/3P 1 J8
5 MB 1 SW1
Caspar Ockeloen-Korppi
Author:
Caspar Ockeloen-Korppi

Finnish SDIY enthusiast, Finland

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Knowledge Base Codex
Electronics, September, 1980

Two-chip generator shapes synthesizer's sound

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