About this video
A parts walk-through for a small electronics project, the Spout bot. It lists the lead-free solder, hot glue, 41-ohm resistors, blue LEDs, small motors, sliding switches, insulated wire, shrink tubing, bottle caps and a double-A battery holder, and explains the role of the key parts, including why two 1.5 V cells in series give 3 V.
You'll be able to
- name the parts needed to build the Spout bot
- explain how two 1.5 V cells in series give 3 V for the motors
- explain what a resistor does to LED brightness
Key words
- Resistor
- A component that limits current; in this build its ohm value affects how bright the LEDs are.
- Series circuit
- A circuit where components are chained end to end, so their voltages add up across the chain.
- Solder
- A metal alloy melted onto joints to make electrical connections that conduct current.
- Single pole double throw switch
- A switch that can connect one input to either of two outputs; bending one throw away turns it into an on/off switch.
- Insulated wire
- Wire covered in plastic so that current flows only where the builder intends.
Transcript
These are the parts you're going to need to build your Spout bot. We've got lead free solder here. This is going to be used to make metal connections and conduct electricity and hold our circuit together. We've got some hot glue. That's a hot glue stick. We'll use that to hold the parts together that don't need to conduct electricity.
We have two resistors here. These are 41 ohm resistors. You can use anywhere from around 40 to 200 ohms. It kind of depends on how bright you want your LEDs to be and what types of LEDs you choose. We've got our LEDs here. These are two water clear blue LEDs and four paper clips.
There are two 1.5 volts to three volt motors, which work well with our batteries, which happen to be 1.5 volt double As. And together in series, they are three volts. Then we have two bottle caps from water bottles, some shrink wrap tubing. This comes in a lot of different sizes and colors.
We've chosen 1/16 inch and I believe 1/8 inch tubing. And we've got some sliding lever switches here. I should say, sliding switches. These are sliding single pole double throw switches. We've bent one of the throws out of the way so it's just a single pole single throw switch.
So we're going to use those as on/off switches. And then we have single pole double throw lever switches. And we're going to use one pole in both of the throws for those. And then we have wire. And this is 22 gauge insulated wire. We've chosen a number of different colors-- green, blue, red, yellow, and white.
And basically, we chose those colors because they're going to show up better in the video when we put them on top of our battery holder. And this is our double A battery holder. So those are the parts that you're going to need to build the Spout bot. Now we're going to talk about the tools.
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