A Common Emitter Amplifier circuit designed on a 2 layer PCB.

This board allows for a resistor to be connected to the transistor's emitter pin along side a decoupling capacitor to overcome feedback allowing for high stable gains of up to approximately 185 (Based on software simulations). The board has pins for both an AC and DC supply source; the latter allowing up to 10V, as well as output voltage pins.

The components needed to construct this circuit are as followed:

• Q1 = To-18 Transistor
• RE1 & RE2 = 470 Ohm Resistor
• RC = 4.7K Ohm Resistor
• RB1 = 82K Ohm Resistor
• RB2 = 18K Ohm Resistor
• CIN & COUT = 1uF Polarised Capacitor
• CE = 10uF Polarised Capacitor

Negative and positive pins can be identified by appropriate symbols on the top layer of the board and all component positions are clearly labelled to facilitate construction.