Free Electronic Circuit Design
This installation has been tested to work on Windows 10, and can be expected to work on 64-bit Windows OS version from year 2008 and after. Download the driver file from http://deeptronic.com/download/pl2303-old-driver.zip and extract the file Plug the USB converter cable, newest driver might be automatically installed. Open Device manager, select the detected port, right click and select Update Driver […]
Read moreBlackstomp is a digital audio effect processor development platform based on ESP32-A1S module. To speed up the effect pedal development cycle, Blackstomp provides a standard development-mode pedal to quickly test and run your application program. In this manual document, you will find the following information: I. Schematic Diagram II. Port and Knobs Layout III. External Connection III.1. Guitar/Line Input/Output III.2 […]
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Table of Contents I. Schematic Diagram II. Bill of Materials III. Port Connector Layout IV. Potentiometer and Toggle Switch Mounting IV.1. Potentiometer Mounting IV.2. Toggle Switch Mounting IV.3. Reducing Enclosure Mounting Stress V. Development-Mode Wiring V.1. Wiring Diagram V.2. Bill of (Offboard) Materials VI. Firmware Programming Through Onboard UART Connector VII. Universal Drill Templates I. Schematic Diagram II. Bill of […]
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Table of Contents I. Schematic Diagram II. Bill of Materials III. PCB Layout IV. Port Connector Layout V. Manual SMD Component Soldering VI. Onboard Potentiometer and Toggle Switch Mounting VI.1 Potentiometer Mounting VI.2 Toggle Switch Mounting VI.3 Reducing Enclosure Mounting Stress VII. Development-Mode Wiring VII.1. Wiring Diagram VII.2. Bill of (Offboard) Materials VIII. Firmware Programming Through Onboard UART Connector IX. […]
Read moreAfter finished with the board installation for ESP32, we can proceed to the Blackstomp library installation: Download Blackstomp library from https://github.com/hamuro80/blackstomp , extract the zip file after download. Make sure you can find the library folder “Blackstomp” inside the “arduino-library” folder. On Arduino IDE, go to menu Sketch > Include Library > Add .ZIP Library, and navigate to the extracted library folder “Blackstomp” […]
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Read moreBefore writing Blackstomp sketch with MIDI support, we have to be aware that Blacktomp library doesn’t provide direct support for MIDI functions. As the consequence, we have to use third party library if we don’t want to write our own MIDI low level functions. Installing MIDI Library Before we can compile the example code “midipedal.ino”, we have to install the […]
Read moreBlackstomp core provide a very simple BLE (Bluetooth Low Energy) terminal interface for the easiest implementation. All you need to is just enabling the BLE terminal by calling enableBleTerminal() inside Arduino’s setup() and write the BLE terminal handler for the effectModule descendant class. Here is the example sketch code: You can see in the sketch code, the method enableBleTerminal() (at […]
Read moreBlackstomp library provide two methods that control the analog path switching inside the audio codec: analogBypass() and analogSoftBypass(). Use analogBypass(true) to bypass the effect processor so the input will be routed to the mixer output. The ADC input will be disconnected from the input and the DAC output will be disconnected from the output mixer. The analog path is this […]
Read moreThere are two LED indicators in Blackstomp, and we can easily control them through mainLed and auxLed objects. The object has 4 methods for easy and flexible control: turnOn(), turnOff(), blink(), and updateBlink(). Calling turnOn() method will turn the LED continuously-on, regardless the previous state (already turned-on, turned-off, or blinking). Calling turnOff() method will turn the LED continuously-off, regardless the […]
Read moreFrom the previous volume level control example, rather than directly access the control[0].value inside the processing function, we can write a handler that compute an intermediate variable called gain and gainRange. Without these intermediate variables, we have to compute the control[0].value from 0-127 integer values into 0.0-1.0 (floating point) and convert control[1].value to gain range value (floating point) at every […]
Read moreTo add parameter controls, we can setup one or more of control array element. Each element (control[0], control[1],..,control[5]) has mode which is set to default value CM_DISABLED by the system’s setup. Setup the control name (control[n].name) to a self-descriptive name for the control function, such as “Out Level”, “Gain”, “Distortion Level”, etc. The control mode (control[n].mode) can be set to […]
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