Along the way I include a few tips about soldering.
A few things different from the breadboard project:
I used a toggle switch instead of a slider.
I added an LED so that you could tell if the power is on. This is important because this unit is portable and operates on battery instead of a steady power supply. If the LED goes dim you will want to replace the battery. The downside to using a battery is that the sound will change pitch as the battery weakens.
All the connections are permanently soldered.
The components are hot-glued to secure them and to insulate them from shorting on other components and the side of the tin.
You may want longer probe wires so you can stretch across larger drawings.
Power supply (a 9 volt battery and connector)
Wires (an assortment of sizes with the ends trimmed bare and tinned would help)
Small Switch (on-off or on-on will work fine)
Speaker 16 Ohm 25 W (Actually just about any little old speaker will work)
Audio Transformer (you can pick one up at Radio Shack for about $3) [Model: EI-19 Catalog #: 273-1380, Frequency response: 300Hz to 10kHz, 1,000-ohm center-tapped primary, 8-ohm secondary, Low-level impedance matching]
Capacitor Ceramic 0.047uF
Paper (a nice piece of card stock would be nice)
No 2 Pencil
For so many of my projects I scavenge my parts from old electronics that are worn out. That saves a tiny fortune on parts but the cost of most of these parts brand new is probably under $10 especially if you order from a place like http://www.taydaelectronics.com
I was disappointed they didn't have the Audio Transformer but I did look it up and found it available at Radio Shack.