2ae78fe6b8
* initial notes * updated code samples * splitting the page and preparing layout * missing gamepad api * added basic guitar activty md files added initial draft of guitar lesson - in progress * word smithing and adding detail for concepts listed * word smithing and adding detail for concepts listed * typo in file name * missing macro * replaced guitar.png with image from Julia Carlson * adding a few pictures * adding cards macros * few tweaks * image for accellerometer lesson xyz axis * fixed the numbering buttons page -fixed the numbering to restart for each section and asdded spaces after so they don't wrap * adding a few video links * pin-press - added circuit info * more vids * fixing latest commit * edits to light sensor and pin-press * updated descriptions, linking lesson * pin-press and display-buttons updates -added dode samples to pin press * updated making video * light-sensor updated numbering * Clean up Clean up of headings to template style, other fixes * putting display in template use h2 with "Step 1:" and image before text * removed numbered lists for display & light these topics are code complete * more consistent formating Acceleromenter, buttons, light sensosr * Acceleration Lesson, added art Lesson steps for Acceleration, art for degree F to C for Map anology+clean up of light sensor topic * Pin Press code complete some other basic fomats and edits * Removed dashes in lesson names renamed and fixed references to files with "-" in names * rest of fles w/ dash in name changes * fixed links to guitar activities * updated acceleraomter section * transparency 4 art, image text added transarency and renamed art, added descriptive text for video and still images * renamed art * fixing the merge * fixing hint * moved step 2 outside ~hint block * fixing snippets * remove guitar from project list * Duration/Materials consistent format moved out of ~avatar block
3.2 KiB
Pin Press Switch
@description micro:bit guitar: use pin press to toggle guitar play on/off
~avatar avatar
Use pin press to switch guitar play on/off
- Concepts:
- Circuit
- Conductor
- Variable/Global-Variable
- Conditional:
if,else - Boolean:
True/False
~
Duration: approximately 45 minutes
Materials:
2-3 Crocodile clips
Blocks
var on = false
on;
if (on) { } else {}
input.onPinPressed(TouchPin.P1, () => {})
~hint
Circuits & Switches
- Circuits need a power supply (battery), a resister (like a LED) & a conductor (metal, water, hand)
- Switches turn electric power on by closing (completing) a circuit with a conductor so power can flow
Metal foil and wires make excellent conductors
In this activity we use YOU to conduct electricity
to close the circuit that switches the guitar ON and OFF!
~
Step 1: Pin Press Test
input.onPinPressed(TouchPin.P0, () => {
basic.showNumber(0)
})
input.onPinPressed(TouchPin.P1, () => {
basic.showNumber(1)
})
input.onPinPressed(TouchPin.P2, () => {
basic.showNumber(2)
})
Create the pin-press code
Download the code on the micro:bit
Hold the micro:bit touching The GND pin with one hand
with the other hand alternately touch the 0, 1 and 2 pins
~hint
The electric signal traveled from pins, between your hands to GND and the micro:bit detected the electric signal!
~
Step 2: Installing conductive foil on the guitar
https://youtu.be/NX0ECcpXFes
Add foil to the guitar body where it is easy to touch while playing
Connect the foil to GND using a crocodile clip
https://youtu.be/YkymZGNmkrE
Add foil to the guitar neck
Connect the foil to pin 1 using a crocodile clip
Step 3: Add a switch to turn the guitar ON and OFF
Using the on global variable we can switch the message on the micro:bit
between ON and OFF
let on = false
basic.forever(() => {
if (on == true) {
basic.showString("ON")
} else {
basic.showString("OFF")
}
})
input.onPinPressed(TouchPin.P1, () => {
if (on == true) {
on = false
} else {
on = true
}
})
Create the ON/OFF switch code
Download the code on the micro:bit
Test by touching P1 to toggle the LED message between ON and OFF
Final code
TODO: do we want to use on = !on; or be more direct in flipping the switch? on = true; on = false;
var on = false
basic.forever(() => {
if (on) {
music.setTempo(pins.map(Math.abs(input.acceleration(Dimension.Y)),
0, 1023,
60, 320))
music.playTone(
input.lightLevel() * 25,
music.beat(BeatFraction.Quarter)
);
} else {
music.rest(music.beat())
}
})
input.onPinPressed(TouchPin.P1, () => {
on = !on;
})
Now Play!
Turn the guitar ON and OFF with a pin press on the connected foil
touching both pieces of foil at the same time to connect the switches