Three important transistor switching circuits

Touch the end of wire W for a fraction of a second to B₁ then to B₂. Do you see why this type of circuit is called a bistable?

Push the switch, then wait. Do you see why this type of circuit is called a monostable?
Try the circuit with different capacitor C and resistor R.

This circuit is called an astable because it continually oscillates. This is similar (in principle) to the circuits which produce the "clock" pulses in computers. Again, try with different capacitors and resistors, R.

• The Transistor
• The Transistor as a Switch
• The Transistor as an AMPLIFIER

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