125B · 5 knobs
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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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 31 | ||||
| R1 | 22k | 22k | Vishay PR01 or generic 1/4W resistor | (R-PR01-22K) |
| R2 | 330k | 330k | Vishay PR01 or generic 1/4W resistor | (R-PR01-330K) |
| R3 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R4 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R5 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R6 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R7 | 4k7 | 4.7k | Vishay PR01 or generic 1/4W resistor | (R-PR01-4D7K) |
| R8 | 1k8 | 1.8k | Vishay PR01 or generic 1/4W resistor | (R-PR01-1D8K) |
| R9 | 220k | 220k | Vishay PR01 or generic 1/4W resistor | (R-PR01-220K) |
| R10 | 220k | 220k | Vishay PR01 or generic 1/4W resistor | (R-PR01-220K) |
| R11 | 2k2 | 2.2k | Vishay PR01 or generic 1/4W resistor | (R-PR01-2D2K) |
| R12 | 2k7 | 2.7k | Vishay PR01 or generic 1/4W resistor | (R-PR01-2D7K) |
| R13 | 1M | 1M | Vishay PR01 or generic 1/4W resistor | (R-PR01-1M) |
| R14 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R15 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R16 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R17 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R18 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R19 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R20 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R21 | 150R | 150 | Vishay PR01 or generic 1/4W resistor | (R-PR01-150) |
| R22 | 47k | 47k | Vishay PR01 or generic 1/4W resistor | (R-PR01-47K) |
| R23 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R24 | 220k | 220k | Vishay PR01 or generic 1/4W resistor | (R-PR01-220K) |
| R25 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R26 | 12k | 12k | Vishay PR01 or generic 1/4W resistor | (R-PR01-12K) |
| R27 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R28 | 10k | 10k | Vishay PR01 or generic 1/4W resistor | (R-PR01-10K) |
| R29 | 100k | 100k | Vishay PR01 or generic 1/4W resistor | (R-PR01-100K) |
| R30 | 1M | 1M | Vishay PR01 or generic 1/4W resistor | (R-PR01-1M) |
| R31 | 47R | 47 | Vishay PR01 or generic 1/4W resistor | (R-PR01-47K) |
| Capacitors 26 | ||||
| C1 | 47u | 47u | Polarized electrolytic capacitor, 5mm | (C-ETR47-25) |
| C2 | 47n | 47n | Box film capacitor, 7.2 x 2.5mm | (C-R82-47N) |
| C3 | 10n | 10n | Box film capacitor, 7.2 x 2.5mm | (C-R82-10N) |
| C4 | 4u7 | 4.7u | Polarized electrolytic capacitor, 5mm | (C-ETR4D7-50) |
| C5 | 1u | 1u | Polarized electrolytic capacitor, 5mm | (C-ETR1-50) |
| C6 | 4u7 | 4.7u | Polarized electrolytic capacitor, 5mm | (C-ETR4D7-50) |
| C7 | 4u7 | 4.7u | Polarized electrolytic capacitor, 5mm | (C-ETR4D7-50) |
| C8 | 47u | 47u | Polarized electrolytic capacitor, 5mm | (C-ETR47-25) |
| C9 | 47u | 47u | Polarized electrolytic capacitor, 5mm | (C-ETR47-25) |
| C10 | 4n7 | 4.7n | Box film capacitor, 7.2 x 2.5mm | (C-R82-4N7) |
| C11 | 100n | 100n | Ceramic disc capacitor | (C-D100N-50) |
| C12 | 2n2 | 2.2n | Box film capacitor, 7.2 x 2.5mm | (C-R82-2N2) |
| C13 | 47u | 47u | Polarized electrolytic capacitor, 5mm | (C-ETR47-25) |
| C14 | 2n2 | 2.2n | Box film capacitor, 7.2 x 2.5mm | (C-R82-2N2) |
| C15 | 100n | 100n | Ceramic disc capacitor | (C-D100N-50) |
| C16 | 1u | 1u | Polarized electrolytic capacitor, 5mm | (C-ETR1-50) |
| C17 | 220n | 220n | Box film capacitor, 7.2 x 2.5mm | (C-R82-220N) |
| C18 | 100n | 100n | Box film capacitor, 7.2 x 2.5mm | (C-R82-100N) |
| C19 | 100n | 100n | Box film capacitor, 7.2 x 2.5mm | (C-R82-100N) |
| C20 | 15n | 15n | Box film capacitor, 7.2 x 2.5mm | (C-R82-15N) |
| C21 | 100n | 100n | Ceramic disc capacitor | (C-D100N-50) |
| C22 | 100n | 100n | Ceramic disc capacitor | (C-D100N-50) |
| C23 | 100n | 100n | Ceramic disc capacitor | (C-D100N-50) |
| C24 | 47u | 47u | Polarized electrolytic capacitor, 5mm | (C-ETR47-25) |
| C25 | 4u7 | 4.7u | Polarized electrolytic capacitor, 5mm | (C-ETR4D7-50) |
| C26 | 4u7 | 4.7u | Polarized electrolytic capacitor, 5mm | (C-ETR4D7-50) |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | (P-Q1N5817) |
| Transistors 1 | ||||
| Q1 | 2N5088 | 2N5088 | Silicon BJT, TO-92 | (P-Q2N5088) |
| ICs 4 | ||||
| U1 | MC78L05 | MC78L05 | 5V regulator, TO-92 | (P-QMC78L05) |
| U2 | TL072 | TL072 | Dual op-amp, DIP-8 | (P-QTL072) |
| U3 | PT2399 | PT2399 | Digital delay chip, DIP-16 | (P-QPT2399) |
| U4 | TL062 | TL062 | Dual op-amp, DIP-8 | (P-QTL062) |
| Potentiometers 5 | ||||
| RV1 | A50k | A50k | 16mm right angle PCM Alpha potentiometer | Feedback control (R-VAM50KA-SS-PCL) |
| RV2 | A50k | A50k | 16mm right angle PCM Alpha potentiometer | Wet Amount control (R-VAM50KA-SS-PCL) |
| RV3 | B25k | B25k | 16mm right angle PCM Alpha potentiometer | Delay Time control (R-VAM25KL-SS-PCL) |
| RV4 | C1M | C1M | 16mm right angle PCM Alpha potentiometer | LFO Speed control (R-VAM1MC-SS-PCL) |
| RV5 | B10K | B10k | 16mm right angle PCM Alpha potentiometer | LFO Amount control (R-VAM10KL-SS-PCL) |
| Switches 1 | ||||
| SW1 | Chorus | CHORUS | DPDT mini toggle switch | Delay/Chorus (P-HTOG-GORVA-M2) |