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!
A stack of PCBs ready to be assembled
I thought I’d have a go at getting my PWM controller PCB made professionally.
I’ve updated the code to my LED strip driver and included a few new features.
Here’s a quick demo video.
[UPDATE 7 Mar 2011] Added input/output graph plus link to download LUT calc excel file.
[UPDATE : DEC 6 2010] I’ve had some proper PCB’s made for this circuit. More info here.
DSO Nano (Image taken from Seeedstudio.)
A friend asked me about the oscilloscope I was using in my last post, you can see it in the very poor quality video at the end of the post. So I thought I’d make a quick post to explain. It’s called the DSO Nano, it’s sold by Seeedstudio and the short of it is that it’s a fantastic tool for a great price. It is limited in bandwidth, and has only one channel but I love it all the same. It has around 1MHz of analog bandwidth which is admittedly quite low – giving a useable working limit to signals of around 100KHz – but that is more than enough for audio and fine for just about everything I’ve been doing such as debugging my PWM output from my LED fader.
I have been playing around with building a lamp for my desk using a LED strip and constant current driver that I bought from Deal Extreme a while ago combined with a PIC12f683 to provide variable brightness via Pulse Width Modulation (PWM).
The demo using a plain old green LED as the output.
[UPDATE OCT 20 2010] I’ve updated the firmware for this project to include new features. More info and firmware download here.
For any one that is interested I have tidied up the Eagle CAD files for my lighthouse circuit. You can grab them here. They’re not perfect and are probably not suitable for sending to a PCB production company but they might give you a head start of making your own version.
They’re saved from Eagle CAD version 5.6.0 so you’ll need to go to thier site to get that if you don’t have the latest version.
UPDATED! : I’ve added a photo to the battery terminals, see below.
Recently my trusty Black & Decker Quatro drill/driver/saw/sander started misbehaving. It’s been great for years and gotten us through a lot of DIY and IKEA modification. But now it could barely manage to cut a 15cm length of 1cm chipboard.
Time for a bit of investigation.
Life does get rather busy sometimes. For us it was having a baby and moving house in the same week. Subsequently I’ve been rather preoccupied.
But that was nearly 6 months ago and things are getting a little more sorted out now, plus it was my birthday recently so I thought it was about time to get back in to electronics and also to add some new posts to this blog.