Instructors: Rick Anderson ([email protected])
Brought to you by: Rutgers GRID, Makerspace, and CMSCE
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Need more energy for your projects? How many LEDs can I use in a project? When will an LED explode? We’ll review kinds of power needed for various projects. Learn how to find the right kind and amount for your project. Charging and recharging storing and using energy for student projects like solar panels, robots, and Arduino.
- Intuition Exercises
- Exploring leds
- Exploring motors
- Basic Electronic components in parallel and series
- Learning about data sheets
- Framing assignments and challenges for students
- Take all the coin cells and leds and sort by brightnes
- The Power Detective
- (Bonus) Hunt for Energy: Energey Scavenger Hunt
- Burn out an LED
- How did you do it?
- Take all the coin cells and leds and sort by brightnes
- Measure the values of the batteries in volts
- Write this down on a big sheet of paper
- Graph the results on x/y plane
- Find the coin cell datasheet
- Exaimine the graph of voltages
- What's happening here?
- What do we know now?
- Collect key terms
- Review the graphs vs your own graph
- Learn about a Benchtop Variable Power Supply
- Set the voltage and current
- Control a toy motor
- Listen for the pitch of the motor in relation to rotation speed
- Identify what is happening?
- How dow we get it to start?
- What values do see when it turns on?
- Create a note list of values
- Slow the motor with your fingers.
- What do you feel?
- You are the resistor
- Collect key terms
- Compare to the graph the data gathered
- Measure Resistance
- Measure Current (Change the plugs)
- Measure Voltage
- What else does this information get us?
- Volts
- Current (milli amps)
- Resistance (Ohms)
- Resistance
- Current
- Voltage
- Volts = Current * Resistance
- V = IR
- There is no escape from this principal
- How much work is going on here?
- Watt's
- Power = Volts * Current
- W = V * I
- Calculated for steady state +++
- Power and Time
- Formal definition of power
- You could feel heat?
- Heat can go past the tolerance of the part
- Check the wattage of your resistor
- Datasheet of a resistor
- What is a 1/4 watt?
- What's the max it can take?
- How low can you drop the source voltage of 9v battery using resistors in series?
- What happends when you drop put the same number of resistors in parallel?
- How many leds can be placed in series with a 3v coin cell?
- How many leds can be placed in parallel with a 3v coin cell?
- Measure the current
- Measure the voltage
- What is the voltage drop?
- Compare with the datasheet?
- Each device consumes current
- Current consumption adds by each device attached
- What happens when batteries are in series?
- What happend when batteries are in parallel?
- These batteries are super low on energy
- Measure voltage
- Check the data sheet for the litium batteries
- How hot do they get?
- What role is heat playing?
- How long will they last?
- Calculate the watts
- Check the watt hours
- Charging batteries
- Check out the chargers
- Hook up some batteries are charge them
- Uses NiMH
- Measure current voltage
- Is it at max?
- Drive it around
- Measure the voltage
- Let's charge it back up
- What's the max voltage a typical project can handle?
- Limited set of ingredients
- Small challenge
- Multimeter
- Variable Power source
A motor has fallen apart on the table. What's going on does it work? Parts: motor, wires with clips, power supply multimeter
- Data sheet
- Ohms Law
- Power Definition
- Take the solar panel and an led try to find where the panel is the brightest.
- Measure with a volt meter the voltage being collected
- Introduce Current
- Measure the current
- Connect toy motor to solar panel
- Quesetion can you get it to go?
- Adafruit 5v charger
- Solar Panel
- Rechargable Battery
- Takes these ingredients and build a charging set up
- Check brightness
- Check how much battery is left
- Try to power a motor