Today we will be experimenting with transistors. In our first circuit, we will be using the transistor as a switch. The transistor has a collector, base and emitter. In the first picture, on the left side you can see the circuit we will be building. The top connection will be the collector, the middle will be the base and the bottom will be the emitter. From the picture you can see that the base is functions like a gate where it controls the current flowing from collector to emitter. The gate is opened by flowing current through the base.
The second circuit we removed the R2 resistor and used our fingertip to complete the circuit to the base.
As you can see my finger acts as a resistor and allows current to flow through the base which opens the gate to flow current from collector to emitter.
The next experiment with transistors will be to create a logic probe.
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