Akashic Guitar effects circuit lookup
12

Enclosure not stated

Scientific Guitarist

EchoWreckA PT2399-Based Work-Alike of the Classic Echo Machine

Category
Delay
Price
see vendor

From the vendor

In a discussion of classic delay/echo effects, the ones that most frequently get mentioned are the EchoPlex EP-3, Roland Space Echo, and the Binson Echorec. The EP3 and Space Echo are tape delays, while the Echorec is based around a magnetic disk that spins past 4 playback heads.

There have been some DIY projects in the past that have attempted to replicate the sound of the Echorec with varying amounts of success. The awesome Multiplex from 1776 Effects cops the general vibe of the Echorec, but uses only two delays instead of 4. The FV-1 chip also makes it possible to get a high level of accuracy and detail, but I'm a cheapskate and wanted to see what I could do with the old standby, PT2399.

The Echorec has a fixed delay time of approximately 300 ms, but I wanted to give a little more flexibility, so I added adjustable (but synchronized) delay times and decided to add tap tempo for goo

Schematic

The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 51 rows

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RefValueNormalizedTypeNotes
Resistors 15
×41k1kResistorshopping list
×41k51.5kResistorshopping list
×14k74.7kResistorshopping list
×3010k10kResistorshopping list
×112k12kResistorshopping list
×415k15kResistorshopping list
×722k22kResistorshopping list
×947k47kResistorshopping list
×168k68kResistorshopping list
×10100k100kResistorshopping list
×1180k180kResistorshopping list
×3220k220kResistorshopping list
×5330k330kResistorshopping list
×4470k470kResistorshopping list
×11M1MResistorshopping list
Capacitors 15
×147pF47pCapacitorshopping list
×1100pF100pCapacitorshopping list
×81nF1nCapacitorshopping list
×44.7nF4.7nCapacitorshopping list
×610nF10nCapacitorshopping list
×415nF15nCapacitorshopping list
×222nF22nCapacitorshopping list
×147nF47nCapacitorshopping list
×27100nF100nCapacitorshopping list
×161uF1uCeramic Capacitorshopping list
×510uF10uCeramic Capacitorshopping list
×847uF47uCeramic Capacitorshopping list
×210uF10uElectrolytic Capacitorshopping list
×147uF47uElectrolytic Capacitorshopping list
×2100uF100uElectrolytic Capacitorshopping list
Diodes 1
×11N4148W1N4148Wshopping list
Transistors 1
×4BC849BC849shopping list
ICs 3
×1CD4066CD4066shopping list
×3TL072DTL072Dshopping list
×4PT2399PT2399shopping list
Potentiometers 2
×1B25kB25kPotentiometershopping list
×3B50kB50kPotentiometershopping list
Switches 4
×9SPDTSPDTOn/On Toggleshopping list
×1SPDTSPDTOn/Off/On Toggleshopping list
×13PDT3PDTfootswitchshopping list
×1SPSTSPSTmomentary footswitch, NOshopping list
LEDs 3
×1RLED_TapRLED_TAPshopping list
×1RLED_BPRLED_BPshopping list
×2LEDLEDshopping list
Jacks & sockets 2
×21/4”1/4”input jackshopping list
×1DCDCpower jackshopping list
Other 5
×1EN11EN11Encodershopping list
×1LM78M05LM78M05shopping list
×1ATTiny841ATTINY841shopping list
×2TLC2272TLC2272shopping list
×1EnclosureENCLOSUREshopping list