2 layers100 × 100 mm
2 layers75 × 65 mm
Electro maticv
jothebuzzyard/echo-matic-cloneA repo for kicad files for an eletro-matic tape-delay clone
- Size
- 75 × 65 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 27
- Pads
- 89
- Tracks, vias
- 165, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Apr 2025
- Updated
- 22 Sep 2025
Overview
Electro maticv is an open-source printed circuit board by jothebuzzyard, from the jothebuzzyard/echo-matic-clone repository on GitHub, published under the MIT licence. It is a 2-layer board of 75 × 65 mm with 35 parts on 27 nets, routed with 165 tracks and 0 vias.
It is built around the MC33174D. Its parts include 16 resistors, 12 capacitors, 4 connectors, 1 IC and 1 diode.
Main components
1README
README.mdEcho-matic
The Echo-matic is a small DIY project that enables you to use an old three-head tape deck as an analog delay. Effectivley it is a simple mixer that takes an input, sends it to a tape deck, then retrives the signal back and re-mixes it with the original signal. It has some controls for wet/dry mix, level and echo repeats.
This project was made from the information found in this blog: https://proto-schlock.blogspot.com/2015/04/echo-matic-diy-tape-delay.html
Original article
This is the original article that this project is based on. It contains a BOM, a diagram and a circuit.
Disclaimer
This circuitboard is tested and works, HOWEVER it's missing holes for the battery. So you'll have to solder that into other holes on the +- rail
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 10uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C4, C5, C7, C9, C10, C12 |
| 4 | 100K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R2, R3, R4, R13 |
| 4 | 100p | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C2, C3, C6, C11 |
| 3 | 10K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R1, R7, R8 |
| 3 | 22K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R12, R14, R15 |
| 2 | 10K-A | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | R11, R16 |
| 1 | 1.5K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R9 |
| 1 | 100 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R5 |
| 1 | 20K | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | R10 |
| 1 | 220uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C8 |
| 1 | 4001 | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D1 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P2.54mm_Vertical | R6 |
| 1 | BYPASS SWITCH | Button_Switch_THT:SW_CK_JS202011CQN_DPDT_Straight | SW1 |
| 1 | IN FROM TAPE OUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | INPUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | MC33174 | Package_DIP:DIP-14_W7.62mm_Socket | U1 |
| 1 | OUT TO TAPE INPUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | OUTPUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
Questions
How big is the Electro maticv PCB?
It measures 75 × 65 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Electro maticv use?
35 parts, built around the MC33174D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Electro maticv KiCad files?
From the jothebuzzyard/echo-matic-clone repository on GitHub, at the commit this page was made from: the board is electro-maticv.kicad_pcb and its schematic electro-maticv.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Electro maticv design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 2 layers97.2 × 59.1 mm
ArmLEDsPrototype
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
35 parts915 - 2 layers62 × 42 mm
- 2 layers75 × 26 mm
DIY detector electron variant
ozel/DIY_particle_detector
A mobile low-cost spectrometer for measuring radioactivity and the energy of ionising radiation like alpha particles and electrons
35 parts558BSD-2-Clause - 2 layers45 × 25 mm
ReCamera Basically Board
Seeed-Studio/OSHW-reCamera-Series
reCamera is a series of open-source AI cameras.
35 parts495Apache-2.0 - 2 layers160.8 × 24.4 mm
- 2 layers75 × 50 mm
- 2 layers50 × 20.5 mm
