MIDI Clock
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Hammond Commodore MIDI Interface
The schematic circuit board features switches that output -2V when activated and 0V when deactivated. Four 4067 multiplexers combine the 64 switch signals into 4 signals that return to the main PIC board.
The circuit design incorporates a series of switches,...
MIDI Drum Machine Schematic Main CPU Section
The 82C55 and seven-segment decoders on the display board will be replaced with a set of shift registers to eliminate the need for the 82C55 and the extensive wiring. The ADC0804 will be substituted with a serial interface ADC chip,...
8-Way MIDI Drum Pads
Do you have rhythm? Would you like to transfer that rhythm to your computer or hardware sequencer? One of the easiest methods to achieve this is by using MIDI drum pads that can be struck with drumsticks, allowing data to...
Music synthesizer
The music synthesizer mode offers three operational modes: playing a note, playing one of four pre-stored tunes, or recording a tune for later playback.
In the music synthesizer mode, the circuit is designed to facilitate three distinct functionalities, enhancing user interaction...
MIDI controlled switches
It can drive up to 128 individual relays, solenoids, motors, fireworks, pyrophones, etc. With a MIDI note-on message you may switch on one of the 128 LEDs (or relays). Outputs may be switched off by sending a note-off message, or...
Digital Oil-Pressure Gauge
This gauge utilizes a sensor along with resistor R1 to generate a DC voltage that is proportional to oil pressure. Integrated circuits IC1 and IC2 form a two-digit digital voltmeter (DVM). Transistors Q1 and Q2 act as display selectors for...
Simple MIDI interface tester
I designed a simple sinewave generator based on a Analog Devices AD9832 chip. It will generate a sinewave from 0.005 to 12 MHz in 0.005 Hz steps. That's pretty good, and definitely good enough for me! But while waiting for...
MIDI Program Changer
This circuit sends MIDI program changes. It's useful as a guitar pedalboard remote.
The circuit designed for sending MIDI program changes operates by utilizing a microcontroller or dedicated MIDI interface chip that generates MIDI messages corresponding to the selected program changes....
Final Project
The objective was to create an octave that could be played by pressing a crocodile paddle. This device was designed as an entertainment tool, functioning as a giant piano, allowing users to control sound with their feet. The project was...