Schematics for the Chipstomp

Here are the schematics for the Chipstomp.
I’ve tried to keep as much compatibility with the original DP32 circuit but I have removed superfluous elements such as the on-board potentiometer and one of the user leds. I’ve also added an additional tactile button, the OLED and resistor mixed Stereo to Mono input/outputs.
Other than that it’s essentially just a joining of the ChipKit DP32 with the Stomp Shield.
ChipStomp v1 (PDF 90Kb) – Eagle CAD schematic – Zipped (88Kb)

Chipstomp version 1 schematic PNG (2300×1500px, 80Kb)

Introducing the ChipStomp : A Digital effects pedal built with a ChipKit DP32 and a Stompshield

Yet another guitar effects pedal

Here’s something I’ve been working on for a while.  It’s a digital guitar effects processor based on a PIC32MX.  

Video update on Drum-machine progress

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.
Features;

• 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.

Drum machine progress : From prototype to version 2

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

Breakout board for Nokia 1202 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

Drum Machine prototype – schematic

I found some time to convert my hand drawn notes into a proper Eagle Cad schematic.

PIC24 drum machine prototype

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.

Firmware for lighthouse v2.

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

Charlieplexed lighthouse version 2 PCBs have arrived

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!

What do you get if you cross a Tobo with a Billy?

A new TV unit! It's a hybrid of an IKEA Tobo, a bit of Billy and some pine boards.

We’ve been telling ourselves that we’re going to get a new TV for a couple of years and we finally did it.  We’re now all super funky flat-screened, just like the popular kids are doing!