Editor Version ×
Standard

1.Easy to use and quick to get started

2.The process supports design scales of 300 devices or 1000 pads

3.Supports simple circuit simulation

4.For students, teachers, creators

Profession

1.Brand new interactions and interfaces

2.Smooth support for design sizes of over 5,000 devices or 10,000 pads

3.More rigorous design constraints, more standardized processes

4.For enterprises, more professional users

Ongoing

STD Intelligent Pedal Relay Bypass

License: Public Domain

Mode: Editors' pick

Cloned from Smart Relay Bypass Board v2

  • 668
  • 2
  • 2
Update time: 2023-10-24 19:15:53
Creation time: 2023-07-04 17:32:31
Description

A cheap but powerful relay bypass board for guitar effect pedals. In addition to being able to do basic true bypass functionality, it also has the following capabilities:

 

  • Quick tap to switch between engaged and bypass, or hold the foot switch to temporarily toggle engage/bypass until you release
  • Hold when powering on to toggle auto-on/auto-off
  • Remebers state when powered off
  • Small footprint (28.4 mm x 20.3 mm) that fits neatly under an SPST switch
  • Neatly labeled and arranged input/output pads that line up neatly with PCBs from vendors like PedalPCB

 

This board is designed to use an inexpensive, reliable latching relay that's available from LCSC/JLCPCB.  All of the components except for the microcontroller and electrolytic capacitor are pre-selected for assembled by JLCPCB, with every component except for the relay being basic components. For my most recent order, the total cost per unit, including the SPST foot switch, microcontroller, and assembled PCB, was less than $4. That's basically the same price as a 3PDT foot switch.

Here are the components that you will need to purchase separately if you get the board assembled by JLCPCB:

 

 

You can write the programming for the microcontrollers yourself or you can grab this ready-to-use code from Github. You can also buy pre-programmed microcontrollers from MAS Effects.

Design Drawing
schematic diagram
1 /
PCB
1 /
The preview image was not generated, please save it again in the editor.
ID Name Designator Footprint Quantity
1 + + PAD1 1
2 330nF C1 C0805 1
3 100nF C2 C0805 1
4 100uF C3 0632 1
5 GND GND PAD1 1
6 78L05G IC1 SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR 1
7 ATTINY13 IC2 DIP08 1
8 IJ IJ PAD1 1
9 IN IN PAD1 1
10 LED LED PAD1 1
11 OJ OJ PAD1 1
12 OUT OUT PAD1 1
13 2N3904 Q1 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 1
14 10kΩ R1 R1206 1
15 Switch SW MOMENTARY FOOTSWITCH 1
16 FTR-B4CB4.5Z U1 RELAY-TH_FUJITSU_FTR-B4C 1

Unfold

Project Attachments
Empty
Project Members
Target complaint
Related Projects
Change a batch
Loading...
Add to album ×

Loading...

reminder ×

Do you need to add this project to the album?

服务时间

周一至周五 9:00~18:00
  • 0755 - 2382 4495
  • 153 6159 2675

服务时间

周一至周五 9:00~18:00
  • 立创EDA微信号

    easyeda

  • QQ交流群

    664186054

  • 立创EDA公众号

    lceda-cn