Quick edit:

I just realized I never included the link to the STLs so here they are:
https://www.thingiverse.com/thing:4305060
Have fun
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Hello, this tutorial is going to show you how to make your own laser blasting game.
This project requires some basic knowledge of the Arduino platform. Soldering isn't not required if you use mini breadboards and female to male pin headers., but some basic soldering skills will be necessary if you want to make this project definitive.

I started this fun little project as a quick weekend home hackaton for my son, I just wanted to make a cardboard laser blasting game, but this project quickly grew to become what it is now.

What can you do so far:
Blaster:
_ Switch from 10 shooter mode to fully automatic blasting by pressing the trigger as it loads
_ Change the number of shots in single mode (in Arduino code)

Target
_ Switch between desktop to wall mode

Step 1: BLASTER AND TARGET DESIGN

I made this model to be the most open possible, feel free to use any breadboards, boards or sensors you like. Everything will fit as long as you have a glue gun and zip-ties.

Step 2: Print the Models

Link to STL:

https://www.thingiverse.com/thing:4305060

for these models, I use:

Rafts:
No

Supports:
Yes

Resolution:
0.2 Layer Height

Infill:
10%

Filament_brand:
any

Filament_color:
any

Filament_material:
PLA

Notes: Print these models as you wish, but I prefer to use support in for the base and target

Step 3: Step 1: Gather the Hardware

LASER BLASTER:

Dev board:
Arduino Nano
any Arduino compatible microcontroller should work fine

5V Red Laser (KY 008)
The type of mini 5mw laser you get in the sensor kit

Push button:
I like the arcade style button because they have a screw in ring that will fit the trigger space of the blaster

Mini speaker.
Any type will do even the cheapest

Transistor 2N2222A
for better control of the laser and also for cheap force feedback (to do!).

9v Connector
To connect your battery to the Nano's Vin

Resistor:
One 1.5k Ohm resistor to trigger the transistor

Slide Switch:
any slide switch will work

LASER TARGET:

Dev board:
Arduino Nano

Photoresistor:
Any LDR will work for this project

Servo:
any SG90 9G Servo will be fine

Neopixel Ring:
I'm using a 24 LED pixel ring for this project

Push button:
a 12mm flat button to control the modes

Resistors:
We will need two resistors, one 10K Ohm for the LDR and 470 Ohm to smooth the Neopixel's data

Capacitor:
One 1000 µF, 6.3V will keep your led ring alive and happy
Optional

Mini speaker.(optional)
Any type will do (not implemented yet)

Step 4: Download Arduino and Servo Library

Arduino IDE:

Download and Install it, we will only require one external library:
https://www.arduino.cc/en/main/software

Library:
PWMServo
I'm using the fantastic servo library from Paul Stoffregen
https://github.com/PaulStoffregen/PWMServo
(installing Arduino Libraries)

Music:
TUNES: Thanks to Robson Couto for his Arduino tune
ARDUINO SONGS

Step 5: DOWNLOAD CODE

Codes were written for the Arduino Nano Board

Step 6: Connect It All - LASER BLASTER

BLASTER CONNECTIONS

PIN 10 >> Push button pin
PIN 5 >> 1500 Ohm resistor >> Transistor base pin >> LASER PIN
PIN 8 >> Speaker pin //
Connect 9V >> (+) TO VIN ] - [ (-) TO GND

Download the codes:

Connect the trigger pushbutton to between pin 10 and ground.
Add the transistor. Connect its Base to a 1.5K Ohm resistor then pin 5. connect the emitter leg to the ground rail and the collector to the signal pin of the KY-008.

Connect all components as shown in the first image, upload the codes, If everything is well connected, you should hear the friendly Super Mario tune.

Step 7: Connect It All - LASER TARGET

TARGET CONNECTIONS

PIN 5 >> Button pin

PIN 6 >> 470 Ohm resistor >> Neopixel pin

PIN 9 >> Servo pin (usually yellow cable) // (+) >> VIN || (-) >> GND

PIN A0 >> LDR pin << 1OKOhm resistor >> GND -- other pin to 5v

Connect the PUSH button between Pin 5 and ground.
Connect a 470 Ohm resistor from Pin 6 to the DIN pin of your Neopixel ring. Do not connect the ground and 5v yet, leave them out.
Make sure the LDR resistor is connected correctly between the ground and pin A0. The other legs goes to the 5V rail of your breadboaed.
Add a 1000µF cap between Ground and 5v Pin.
Connect the servo, positioning it with the moving arm toward the inside of the base print.

Download the library PWMServo and install it.
(installing Arduino Libraries)

Upload the blaster's code to the Nano. Once the code is uploaded the servo should reposition itself. The last position it takes should be the same as when the target is up (sometime the movement will be erratic, push the reset button a few time to see if it position itself, if not check the powering).

Turn on your smartphone flashlight and bring it to the LDR, the servo should move from down to up position.
Plug the Neopixel's ring ground and 5V, press reset. if everything is connected you should see the LED come to life and the Servo move to reset itself.
Use your smartphone light again, you will see the LED ring start moving as if it was hit, so will the servo.

If the servo is jittery or acting weird, check if it's receiving enough power.

Step 8: Download and Compile Codes

BLASTER
The blaster is easy to use, you press the trigger, it shoots the laser. But I wanted to make it a little bit more fun so I created two shooting modes. When you turn it on, it will start in 10 shooter mode, for every ten shots you'll have a reload time.

For those like me who aren't sharp shooters, if you press the trigger while it boots, you will be able to go into Stormtrooper mode.

If 10 bullets is too much or too few please modify this line in the code with the number you will like

int bulletNumber = 10; // CHANGE THIS IF YOU WANT MORE BULLETS

TARGET
The target has two modes for those like me who would like to hang it on the wall, by pressing the button the position of the target will switch from table to wall mode.