Enclosure not stated · 5 knobs
Jon Patton's Hamlet DelayVerified
Based on the Jon Patton Hamlet Delay· 1 other board clones it· the maker's own board is Hamlet Delay by Jon Patton
From the post
Here's another design from Jon Patton. It's a delay based on the popular PT2399, with an always-on preamp. The preamp is designed to have a flat EQ and won't alter your tone. So the In and Out pads go to the input/output jacks, instead of the switch. You could still wiring this for true-bypass (just jumper the footswitch pads), but it's designed to use a DPDT. Use one side to turn the delay on/off and the other for the LED indicator. Check out his build doc for a thorough and much better explanation of the circuit, a diagram for the footswitch wiring, as well as the schematic. In his layouts he has the Level and Tone controls as trimmers on the board. I chose to move these off-board, as it seems like useful controls to have externally.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 32 rows
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Check before you build · 1 value the reader of this layout was not sure of
- Charge pump IC right of centre is printed clearly 'TL1054' on both views: unusual part number, almost certainly LT1054
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×5 | 10K | 10k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×2 | 4.7M | 4.7M | read from the layout by eye | |
| Capacitors 10 | ||||
| ×7 | 100nF | 100n | read from the layout by eye | |
| ×1 | 56nF | 56n | read from the layout by eye | |
| ×2 | 1nF | 1n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×2 | 1uF | 1u | box film; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×3 | 1N5817 | 1N5817 | read from the layout by eye | |
| ×1 | 12v | 12V | zener; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | PT2399 | PT2399 | read from the layout by eye | |
| ×1 | TL1054 | TL1054 | as printed; charge pump; read from the layout by eye | |
| ×1 | 7805 | 7805 | regulator, TO-92 outline (I/G/O); named on the wiring diagram; read from the layout by eye | |
| Potentiometers 5 | ||||
| Delay | B100K | B100k | Potentiometer | read from the layout by eye |
| Tone | B25K | B25k | Potentiometer | read from the layout by eye |
| Repeats | A20K | A20k | Potentiometer | read from the layout by eye |
| Mix | B25K | B25k | Potentiometer | read from the layout by eye |
| Level | A10K | A10k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | read from the layout by eye | |
| LEDs 1 | ||||
| ×1 | LED | LED | on board; legend: yellow or green; read from the layout by eye | |
Other boards based on the Jon Patton Hamlet Delay
- Hamlet Delay the original · Jon Patton · $21.20
- Hamlet+ JMK PCBs · 1590BB · $15.00