Making a PCBMaking a PCB

Report and ppt – presentationReport and ppt – presentation

1.)1.) StructureStructure1.1)1.1) Making the PCBMaking the PCB1.2)1.2) Assembling a circuitAssembling a circuit1.2.1.)1.2.1.) The components I chooseThe components I choose1.2.2.)1.2.2.) They functionsThey functions1.2.3.)1.2.3.) The way the circuit worksThe way the circuit works1.3.)1.3.) Comparison:Comparison:the the

traditional placement - SMTtraditional placement - SMT

1.1) Making the PCB1.1) Making the PCB

1. The board is covered with copper and 1. The board is covered with copper and photosensitive film.photosensitive film.

2. The circuit mask is applied.2. The circuit mask is applied.

3. The board is exposed to light.3. The board is exposed to light.

4. The unprotected copper is etched away in 4. The unprotected copper is etched away in acid solution.acid solution.

5. The board surface is cleaned.5. The board surface is cleaned.

6. Holes for the componets are drilled, when 6. Holes for the componets are drilled, when surface is dry.surface is dry.

7. All components are soldered on.7. All components are soldered on.

1.2.)Assembling a 1.2.)Assembling a circuitcircuit

1.2.1.) The components I 1.2.1.) The components I choose:choose:

Power supply generator

Switch

Resistor

lamp

1.2.2.) They function:1.2.2.) They function:

AC Power supply gerneratorAC Power supply gerneratorThese supply electric current.These supply electric current.

SwitchSwitchA switch is used to turn electric current on and A switch is used to turn electric current on and off.off.

ResistorResistorResistors are components that limit the flow of Resistors are components that limit the flow of electric current in a cicuit.electric current in a cicuit.They are made from carbon or metal.They are made from carbon or metal.

LampLampLamps are consumers. They gives off light when Lamps are consumers. They gives off light when a current flows through it.a current flows through it.

1.2.3.) The way the 1.2.3.) The way the circuit workscircuit works

This circuit consists of an AC power supply generator, This circuit consists of an AC power supply generator, a switch, a resistor and a lamp.a switch, a resistor and a lamp.

The resistor and the switch are connected in series.The resistor and the switch are connected in series.

Both are connected in parallel with the lamp and the Both are connected in parallel with the lamp and the AC power supply generator.AC power supply generator.

The hole time the lamp gives light off.The hole time the lamp gives light off.

When pushing the switch, the lamp becomes ---- When pushing the switch, the lamp becomes ---- because of the resistorbecause of the resistor

1.3.) 1.3.) Comparison:Comparison:

Traditional placementTraditional placement

-- the leads of the the leads of the components must components must be inserted be inserted through holes in through holes in the PCB and the PCB and soldered to the soldered to the boardboard

SMT – Surface Mount TechnologieSMT – Surface Mount Technologie

-- components can be soldered dirctly components can be soldered dirctly onto the surface of the boardonto the surface of the board

- - both sides of the board can be usedboth sides of the board can be used because of special miniaturized because of special miniaturized componentscomponents

saving space, cheaper saving space, cheaper production,production,

smaller PCB‘s and greater smaller PCB‘s and greater reliability reliability