Remember the following important points. These points will help you to quickly recall what we learnt in this chapter:
- Use a resistor to reduce current flow
- Ohm's law is very important to remember so that you can calculate the value of the required resistance in a circuit
- All peripherals in a circuit are connected to a common ground
- Transistors are used like electronic switches, operated by applying a voltage to their base
- Rectifier diodes are used as check valves, in order to allow current to flow only in one direction, while preventing current from flowing in the reverse direction.
- The banded or striped edge of a rectifier diode acts like a check valve to stop current from flowing in.