Code Practice Oscillator

This is a very simple low cost circuit, can be assembled on a small PCB. 

Part List

Resistance

IC

100K 0.25W - One

LM 555/ NE 555 - One

1K     0.25W - One

Polyester Capacitor

Variable Resistance

0.1 uf / 50v - One

470 Ohms - One 

0.01 uf / 50v - One

Speaker

Misc. Items

8 Ohms 2W - One

9v Battery - One

Electrolytic Capacitors

Morse Key - One

5 uf / 25v - One

PCB - IC-Vero Board 2 in x 4 in - One

 

9v Battery Cable - One