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Stefan Kalscheuer 2018-09-09 13:35:11 +02:00
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AVR-based footswitch controller for MIDI appliances. AVR-based footswitch controller for MIDI appliances.
The current implementation supports 4 pushbuttons and 1 toggle switch (usually bank switcher) and a hard-coded range of MIDI sequences. The current implementation supports 4 pushbuttons and 1 toggle switch (usually bank switcher) and a hard-coded range of MIDI sequences.
Hardware os based on a single ATtiny2313 microprocessor. Hardware i s based on a single ATtiny2313 microprocessor.
Original design indended to retrofit an analog Vox VFS5 footswitch to control am Axe-Fx II effect processor by Fractal Audio Systems. Original design intended to retrofit an analog _Vox VFS5_ footswitch to control an _Axe-Fx II_ effect processor by _Fractal Audio Systems_.
## Hardware Specs ## Hardware Specs
Hardware is designed to work with a power supply of 7 to 25V DC which is suitable for a standard 9V DC power supply or battery which is common for effect pedals. Hardware is designed to work with a power supply of 7 to 25V DC which is suitable for a standard 9V DC power supply or battery which is common for effect pedals.
The logic is powerd by a Atmel/Microchip ATtiny2313 processor, which can be swapped with about any AVR controller proividing 8 I/O ports and a USART interface. The logic is powered by a Atmel/Microchip ATtiny2313 processor, which can be swapped with about any AVR controller providing 8 I/O ports and a USART interface.
MIDI signal is directly connected to the USART output (active low) of the controller and the 5V DC supply of the board through two 220 Ohm resistors. MIDI signal is directly connected to the USART output (active low) of the controller and the 5V DC supply of the board through two 220 Ohm resistors.
| Pin on Controller | Pin on MIDI Jack | Function | | Pin on Controller | Pin on MIDI Jack | Function |