Skip to main content

Audio Projects

My last post had to do with making a robot that made parts for itself. It's time to shift gears and talk about making audio components. I've always wanted to put together a guitar amplifier from scratch but I've never been able to find a really good explanation on how to do it until I found this website. It's a fairly comprehensive look at how to build a JCM800 head. If you've ever been interested in putting together your own tube amplifier it's a great place to start. He has a lot of great ideas and insightful things to say about building tube amps.

What about effects? I found a really nice website online with a bunch of information on building your own effect pedals. It's called Super-Freq. He has a bunch of schematics and circuit board layouts on there. Check it out for yourself. I'm sure there are other websites out there with effect pedal layouts. Let me know if you find any!

While I was writing this post I also stumbled across Geofex website. They also have a bunch of information and links for good places to start looking for information on building tube amplifiers and effects.

That's it for now. I'm out.

Comments

Popular posts from this blog

Ardunio and the SHT15

For my ongoing thermostat project I require some sort of temperature and humidity sensor. Because I'm fairly new to all this I decided to get a 2 in 1 sensor from Robotshop called the SHT15. I went with the SHT15 because it had both a temperature and humidity sensor and uses a "digital 2-wire" interface. When I first purchased it I didn't realize that "digital 2-wire" didn't mean I2C, but that's another story.

In order to get the sensor to communicate with the Arduino I needed to write some custom code that manipulates the data and clock lines by pulling them high and low at the correct times. I haven't had any experience doing this before so it was a learning experience for me.

Connecting the SHT15 to the Arduino is pretty simple. The data and sck lines each goto a digital input/output on the Arduino and the VCC goes to +5V. Pretty simple. Here is a picture of my breadboard.



As you can see I had to solder on some breadboard wires onto th…

Arduino LED MIDI Controller

It's been a while since I've made a post so I have decided that it was about time I did. This time I'll be talking about my Haunted House I made.

I started with the idea to take a Halloween decoration (small haunted house) and add some LEDs to it and make them blink. What I ended up with was a haunted house with 6 LEDs in it all controlled by MIDI. I used an Arduino to receive MIDI signals from my computer and turn on/off LED lights based on those signals.

Check out the video...




The "MIDI to Arduino Breakout Board" as I call it in the video I designed myself. I used various resources on MIDI around the web and came up with this schematic.




Digikey Part list:

2 x DIN5 - CP-2350-ND
2 x 6N138 - 516-1600-5-ND
1 x diode - 1N914B-ND
2 x 220 ohm resistor
1 x 270 ohm resistor


As you can see it isn't very complicated. The hardest part was finding in DIN5 part numbers at Digikey. The code on the other hand was a bit more complicated. The trick was to decode the …

First Ardunio Program

I have finally received my Arduino and have been able to write a few simple programs for it. For my thermostat program I am interested in being able to read several analog sensors (temperature and humidity). I also need to be able to poll specific sensor values from the computer using the serial interface so I can log their values in 5 minute intervals. I don't have all the electronic components yet to build my thermostat so I wanted to write up some test sketches. I based my sketches on a todbot blog entry that I found very useful.

I was originally going to use the C code that todbot wrote to test communication with the Arduino but I soon realized the limitations. What I ended up doing is using "screen" to open a terminal connection to the serial port so I could send and receive data to/from the Arduino. In the future I will have to write a daemon that will run on my linux box that will constantly poll the Arduino for data but thats another story. For now screen …