Making a PCB

1
Making a PCB

• Report and ppt presentation
• 1.) Structure
• 1.1) Making the PCB
• 1.2) Assembling a circuit
• 1.2.1.) The components I choose
• 1.2.2.) They functions
• 1.2.3.) The way the circuit works
• 1.3.) Comparison the traditional placement - SMT

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1.1) Making the PCB

• 1. The board is covered with copper and
  photosensitive film.
• 2. The circuit mask is applied.
• 3. The board is exposed to light.
• 4. The unprotected copper is etched away in acid
  solution.
• 5. The board surface is cleaned.
• 6. Holes for the componets are drilled, when
  surface is dry.
• 7. All components are soldered on.

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1.2.)Assembling a circuit

• 1.2.1.) The components I choose

lamp
Power supply generator
Switch
Resistor
4
1.2.2.) They function

• AC Power supply gernerator
• These supply electric current.
• Switch
• A switch is used to turn electric current on and
  off.
• Resistor
• Resistors are components that limit the flow of
  electric current in a cicuit.
• They are made from carbon or metal.
• Lamp
• Lamps are consumers. They gives off light when a
  current flows through it.

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1.2.3.) The way the circuit works

• This circuit consists of an AC power supply
  generator, a switch, a resistor and a lamp.
• The resistor and the switch are connected in
  series.
• Both are connected in parallel with the lamp and
  the AC power supply generator.
• The hole time the lamp gives light off.
• When pushing the switch, the lamp becomes ----
  because of the resistor

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1.3.) Comparison

• Traditional placement
• - the leads of the components must be inserted
  through holes in the PCB and soldered to the board

SMT Surface Mount Technologie - components can
be soldered dirctly onto the surface of the
board - both sides of the board can be used
because of special miniaturized components ?
saving space, cheaper production, smaller
PCBs and greater reliability