Akashic Guitar effects circuit lookup
FEEDBACKWET AMOUNTDELAY TIMELFO SPEEDLFO AMOUNT

125B · 5 knobs

Mod Electronics

AxionPCB

Category
Delay
Controls
Feedback · Wet Amount · Delay Time · LFO Speed · LFO Amount
Price
$4.95in stock
Tags
PCB only

From the vendor

The Axion is a delay/chorus pedal based around the PT2399 delay chip. In delay mode, the pedal sounds warm and analog-like at low to moderate delay times. At higher settings, some of the PT2399's noisy lo-fi character comes through. The wet signal and feedback paths have different levels of filtering to keep higher frequency noise content at bay even at extreme settings (up to 1000ms). In chorus mode, the delay time is locked and modulated by the triangle LFO for classic chorus sounds with speed, depth, and wet amount controls. The Axion has a fairly low parts count, and is a relatively simple and compact build despite being a fully featured chorus and modulated delay pedal. The board is mounted to the enclosure via the potentiometers and switches.

Schematic

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

Parts list 69 rows

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RefValueNormalizedTypeNotes
Resistors 31
R122k22kVishay PR01 or generic 1/4W resistor(R-PR01-22K)
R2330k330kVishay PR01 or generic 1/4W resistor(R-PR01-330K)
R310k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R410k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R510k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R610k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R74k74.7kVishay PR01 or generic 1/4W resistor(R-PR01-4D7K)
R81k81.8kVishay PR01 or generic 1/4W resistor(R-PR01-1D8K)
R9220k220kVishay PR01 or generic 1/4W resistor(R-PR01-220K)
R10220k220kVishay PR01 or generic 1/4W resistor(R-PR01-220K)
R112k22.2kVishay PR01 or generic 1/4W resistor(R-PR01-2D2K)
R122k72.7kVishay PR01 or generic 1/4W resistor(R-PR01-2D7K)
R131M1MVishay PR01 or generic 1/4W resistor(R-PR01-1M)
R1410k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R1510k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R16100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R17100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R18100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R1910k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R20100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R21150R150Vishay PR01 or generic 1/4W resistor(R-PR01-150)
R2247k47kVishay PR01 or generic 1/4W resistor(R-PR01-47K)
R23100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R24220k220kVishay PR01 or generic 1/4W resistor(R-PR01-220K)
R25100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R2612k12kVishay PR01 or generic 1/4W resistor(R-PR01-12K)
R2710k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R2810k10kVishay PR01 or generic 1/4W resistor(R-PR01-10K)
R29100k100kVishay PR01 or generic 1/4W resistor(R-PR01-100K)
R301M1MVishay PR01 or generic 1/4W resistor(R-PR01-1M)
R3147R47Vishay PR01 or generic 1/4W resistor(R-PR01-47K)
Capacitors 26
C147u47uPolarized electrolytic capacitor, 5mm(C-ETR47-25)
C247n47nBox film capacitor, 7.2 x 2.5mm(C-R82-47N)
C310n10nBox film capacitor, 7.2 x 2.5mm(C-R82-10N)
C44u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C51u1uPolarized electrolytic capacitor, 5mm(C-ETR1-50)
C64u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C74u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C847u47uPolarized electrolytic capacitor, 5mm(C-ETR47-25)
C947u47uPolarized electrolytic capacitor, 5mm(C-ETR47-25)
C104n74.7nBox film capacitor, 7.2 x 2.5mm(C-R82-4N7)
C11100n100nCeramic disc capacitor(C-D100N-50)
C122n22.2nBox film capacitor, 7.2 x 2.5mm(C-R82-2N2)
C1347u47uPolarized electrolytic capacitor, 5mm(C-ETR47-25)
C142n22.2nBox film capacitor, 7.2 x 2.5mm(C-R82-2N2)
C15100n100nCeramic disc capacitor(C-D100N-50)
C161u1uPolarized electrolytic capacitor, 5mm(C-ETR1-50)
C17220n220nBox film capacitor, 7.2 x 2.5mm(C-R82-220N)
C18100n100nBox film capacitor, 7.2 x 2.5mm(C-R82-100N)
C19100n100nBox film capacitor, 7.2 x 2.5mm(C-R82-100N)
C2015n15nBox film capacitor, 7.2 x 2.5mm(C-R82-15N)
C21100n100nCeramic disc capacitor(C-D100N-50)
C22100n100nCeramic disc capacitor(C-D100N-50)
C23100n100nCeramic disc capacitor(C-D100N-50)
C2447u47uPolarized electrolytic capacitor, 5mm(C-ETR47-25)
C254u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
C264u74.7uPolarized electrolytic capacitor, 5mm(C-ETR4D7-50)
Diodes 1
D11N58171N5817Schottky diode, DO-41(P-Q1N5817)
Transistors 1
Q12N50882N5088Silicon BJT, TO-92(P-Q2N5088)
ICs 4
U1MC78L05MC78L055V regulator, TO-92(P-QMC78L05)
U2TL072TL072Dual op-amp, DIP-8(P-QTL072)
U3PT2399PT2399Digital delay chip, DIP-16(P-QPT2399)
U4TL062TL062Dual op-amp, DIP-8(P-QTL062)
Potentiometers 5
RV1A50kA50k16mm right angle PCM Alpha potentiometerFeedback control (R-VAM50KA-SS-PCL)
RV2A50kA50k16mm right angle PCM Alpha potentiometerWet Amount control (R-VAM50KA-SS-PCL)
RV3B25kB25k16mm right angle PCM Alpha potentiometerDelay Time control (R-VAM25KL-SS-PCL)
RV4C1MC1M16mm right angle PCM Alpha potentiometerLFO Speed control (R-VAM1MC-SS-PCL)
RV5B10KB10k16mm right angle PCM Alpha potentiometerLFO Amount control (R-VAM10KL-SS-PCL)
Switches 1
SW1ChorusCHORUSDPDT mini toggle switchDelay/Chorus (P-HTOG-GORVA-M2)