Here’s a video update on where I am with my Drum-machine project. In the past few months I’ve implemented a fair few new features and sorted out some long standing bugs.
- A new menu mode using the joystick to navigate.
- Added control over the LCD Backlight.
- Added a simple Reverb mode.
- New LCD driver code to render graphics to a buffer and squirt it out to the LCD via 9bit SPI.
- Includes a basic graphics library with some widgets to make creating screens easier.
- Fixed an odd issue with LED’s flashing out of sequence. I had my MAX6957 ports all out or order.
- Added RUN LED flashing to every 4th beat.
- Implemented loading and saving to one of 16 JSON files on the SD card.
- Added a Tuning mode to allow you to individually set the volume and adjust the playback rate of each instrument/sample.
I’ve not posted in a long time so here’s a quick update on the progress of my drum machine. It’s come a fair way from the initial prototype documented in this post back in July 2012.
A sneak look at version 2 with a new 32bit PIC and a new larger LCD
I’ve been using Nokia 5110 LCD screens for a while now they’re 84x48px have a built-in back-light and are really easy to use and quite cheap. Recently though whilst working on my drum machine I found myself wishing for a few more pixels. I want to show a “pattern view” of 16 tracks with 16 steps plus some additional information and 84×48 was getting too tight.
This isn’t a Nokia1202, this is a Sparkfun Nokia 5110 breakout
I found some time to convert my hand drawn notes into a proper Eagle Cad schematic.
This is a project I’ve been working on for over a year but haven’t had the time to complete yet. Electronics takes second place to children… :)
It’s a mini drum machine modelled on classic machines like the Roland TR808. My version is digital, playing samples rather than analogue and uses a single pic24 to do the work.
Here’s the firmware for my V2 lighthouse PCBs.
If you bought a PCB from me I should have already sent this to you, but I though I had better post it here just in case.
Download the C source and Hex here
A long exposure makes it look quite funky
My version two charlieplexed lighthouse circuit PCBs (charliediscs) have arrived back from the Seeedstudio’s fab. I used the same deal as for my last boards, this time it took around 3 weeks in total. That’s pretty good for 20USD!