Photo AI
The electronic circuit shown has components, including ICs, soldered on to a PCB - Leaving Cert Engineering - Question c - 2017
Question c
The electronic circuit shown has components, including ICs, soldered on to a PCB. (i) Explain the terms IC and PCB. (ii) Outline the procedure for soldering the PC... show full transcript
Worked Solution & Example Answer:The electronic circuit shown has components, including ICs, soldered on to a PCB - Leaving Cert Engineering - Question c - 2017
Step 1
Explain the terms IC and PCB.
Answer
An Integrated Circuit (IC) is a set of electronic circuits on a small flat piece (or 'chip') of semiconductor material, usually silicon. ICs can perform various functions such as amplification, data processing, and signal modulation, and they are widely used in various electronic devices, facilitating miniaturization and improved efficiency.
A Printed Circuit Board (PCB) is a physical substrate that holds and connects electronic components using conductive pathways, tracks or signal traces etched from copper sheets. PCBs are essential for providing mechanical support and electrical connections for the components, allowing for the design of complex electronics in a compact form.
Step 2
Outline the procedure for soldering the PCB shown, making reference to equipment, safety and to ensuring a high quality joint.
Answer
Safety
- Ensure the soldering iron is hot and handle it with caution to prevent burns.
- Use proper ventilation to control fumes when soldering, and be aware of safe handling of cleaning agents.
Equipment
- The main tools include:
- Soldering iron
- Solder
- A stand for the soldering iron, preferably with a sponge for cleaning.
- Clamping equipment for stabilizing the PCB.
Soldering Procedure
- Ensure the soldering iron tip is clean and tinned with solder to prevent oxidation.
- Hold the soldering iron at a slight angle to the PCB, simultaneously heating both the component lead and the pad on the PCB.
- Bring the solder wire into contact between the soldering iron and the component lead, allowing the solder to melt properly.
- Remove the soldering iron allowing the solder to cool, which forms a secure joint.
- Continue this process for each component to be soldered.
- Finally, check that each joint is effectively soldered, ensuring the integrity and functionality of the circuit.