Introduction: 1Wamp Guitar Amplifier - Open Hardware
1Wamp is an Open Hardware guitar amplifier, designed it to be a small bedroom and portable 1 Watt amp loaded with all the features of big amps:
- Tone/Volume/Gain controls.
- Speaker/Cabinet output.
- Headphones output with integrated attenuator switch.
- Aux/mp3 input.
- Battery clip.
- 9V DC boss style power input jack.
The project was fully developed using only open source tools: KiCAD - a design suite to create schematics and layouts in any platform (Linux, Windows, OSX).
Step 1: Prepare Your Tools.
You will need a solder iron, lead and cutting pliers. You can get the PCB and/or components from the ElectroSmash Store or build your own at home using the native files or PCB layout transfers from the forum.
Step 2: Get and Solder the Components!
The parts are all through hole and easy to find in Mouser/Farnell.
Soldering the components to the PCB is not difficult, just follow the "How to build 1Wamp in 5 Steps" document and solder the parts starting with the small ones and then place the big components, making all the process easier.
- Pay attention to diodes polarity, there is a line indicating the correct position.
- Be careful with the electrolytic caps polarity, the negative lead (the short one) has to be placed in the round hole. The positive hole is always square-shaped and it is marked with a + symbol.
- Be patient soldering the big components perpendicularly because they tend to be slightly tilted
Step 3: Check the Job Done.
Double check your PCB with the model component by component, before power it up, check this 3 ticks:
- Visual inspection of the PCB bottom, there is no short circuits or long uncut leads.
- The polarized components are placed correctly: diodes and electrolytic caps.
All the native files are open here as a open source/hardware project.