Problem #1 (Conductivity tester)
Identify the problem in the story:
Mr. Pike will be having his classroom perform some lab experiments where they must determine whether or not a substance conducts or does not conduct electricity. They are trying to build a device that well determine whether or not a solution conducts electricity but have no knowledge of electricity!
The Design Brief
Resources:
tape,1000 ohm Resistor, Copper wire, LED, Battery, battery snaps, Pen.
Tools:
Screw driver, Glue gun, Pilers,
tape,1000 ohm Resistor, Copper wire, LED, Battery, battery snaps, Pen.
Tools:
Screw driver, Glue gun, Pilers,
Investigation and Research
Define terms:
Ionic Compounds- is a bond between a positively charge molecule (cation)with a negatively charged molecule (anion).
Molecular Substance-is a pure substance that is formed from nonmetals. It has a fairly low melting point, and can only conduct electricity unless it is aqueous and polar.
Electrolytes-is a liquid or gel that contains ions and can be decomposed by electrolysis. The liquid that's found in batteries.
Anode- is the positively charged electrode by which the electrons leave a device.
Distilled Water- is water that has been purified by distillation.
Cathode- is the negatively charged electrode by which the electrons leave a device.
The color code for a 1000 ohm resistor is BROWN, BLACK, RED.
1. The difference between a cation and an anion is gains electrons so it negative and a cation losses electrons so its positive.
2. Tinning is the process of thinly coating sheets of wrought iron or steel with tin, and the resulting product is known as tinplate. You do it because it cleans the soldering gun.
3. You heat the soldering gun and then touch the solder with the gun and make it melt of the gun.
4. You use a breadboard to develop your first prototype because it is reusable. This makes it easy to use for creating temporary prototypes and experimenting with circuit design.
5. Continuity test is the checking of an electric circuit to see if current flows in it.
6. A conductivity tester is used to measure the electrical conductivity in a solution.
Three different pictures of conductivity testers:
Ionic Compounds- is a bond between a positively charge molecule (cation)with a negatively charged molecule (anion).
Molecular Substance-is a pure substance that is formed from nonmetals. It has a fairly low melting point, and can only conduct electricity unless it is aqueous and polar.
Electrolytes-is a liquid or gel that contains ions and can be decomposed by electrolysis. The liquid that's found in batteries.
Anode- is the positively charged electrode by which the electrons leave a device.
Distilled Water- is water that has been purified by distillation.
Cathode- is the negatively charged electrode by which the electrons leave a device.
The color code for a 1000 ohm resistor is BROWN, BLACK, RED.
1. The difference between a cation and an anion is gains electrons so it negative and a cation losses electrons so its positive.
2. Tinning is the process of thinly coating sheets of wrought iron or steel with tin, and the resulting product is known as tinplate. You do it because it cleans the soldering gun.
3. You heat the soldering gun and then touch the solder with the gun and make it melt of the gun.
4. You use a breadboard to develop your first prototype because it is reusable. This makes it easy to use for creating temporary prototypes and experimenting with circuit design.
5. Continuity test is the checking of an electric circuit to see if current flows in it.
6. A conductivity tester is used to measure the electrical conductivity in a solution.
Three different pictures of conductivity testers:
Question
1. is the design practical? 2. Will the design cost a lot of money? 3. Is the design reliable? 4.Is the design durable? 5. Is the design visually appealing? 6. Is the design safe? 7. Are the resources available? 8. Are the tools available? 9. Can the design be created on time? 10. Does the solution meet the needs? |
Design 1
1. 9 2. 10 3. 10 4. 9 5. 8 6. 10 7. 10 8. 10 9. 10 10. 10 Total:96 |
Design 2
1. 10 2. 10 3. 10 4. 10 5. 9 6. 10 7. 10 8. 10 9. 10 10. 10 Total: 99 |
Design 3
1. 9 2. 10 3. 10 4. 8 5. 8 6. 10 7. 10 8. 10 9. 10 10. 10 Total:95 |
I will be building Design # 2. I have chosen this design because it had the highest rating on are chart above.
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Three Designs Drawed out
Pictures of Prototype
Summary: We built a continuity tester using a pen, wire, battery, LED, tape, and a resistor. Some changes we could have made to improve our continuity tester would be to make the wires longer on the bottom and have both the wires solid.