Electrical Assembly

Gather Materials 

Let's take a look at the new kit

Gather the materials below and get ready to build the PCB for the IMU Game.


All Parts
All Parts
Push Button
8-pos stackable header
8-pos header
6-pos stackable header
4-pos stackable header
10KΩ 3
Capacitor 1
Push Button 1
8-pos stackable header 1
8-pos header 1
6-pos stackable header 1
4-pos stackable header 1
How to Use a Soldering Iron
A short instructional video to learn how to use a soldering iron safely and properly

Tools you'll need

Soldering Iron
Solder Wire
Wire Cutters
Electrical Assembly Video
Follow along to complete the PCB

Solder Resistors 

Get the three 10k resistors. They are the same value so no need to worry about which is which. Resistors are also not polar so there is no putting them in backwards. Bend the leads and place one resistors in each spot labeled with an 'R'. Once the resistors are through the PCB, bend the leads to the side a bit so they don't fall out. Flip over the PCB and solder the resistors. Once all the resistors are soldered in place their leads can be trimmed.

A bent 10k resistor ready to be placed
A bent 10k resistor ready to be placed
A placed 10k resistor
All resistors placed
The flipped PCB
Solder Resistors
All resistors soldered
Trim the leads
Trimmed leads

Solder Button and Capacitor 

Place the Button and Capacitor. Both of these components are not polar so they can't be put in backwards. Once placed, flip over the PCB. Solder the 4 legs of the button and the 2 leads of the capacitor. Once all the solder joints are made trim the leads of the capacitor.

Place the button and capacitor
Place the button and capacitor
A placed button
A placed capacitor
The flipped PCB
Solder the button
Soldered button
Solder the capacitor
Soldered capacitor
Trim the capacitor leads
Trimmed leads

Solder Headers 

There are two types of the headers included with the IMU Game kit. One type is to go through the PCB and into the Arduino. The other type of header is for the IMU and that's the one we'll be starting with. Take the 8 pin non-stackable header and place it in the PCB. Flip the PCB over and just solder one pin for now. Once soldered take a look at the header and make sure its straight. If not, reheat the solder joint and move the header into place. Once straight, the rest of the pins can be soldered.

Find the other 3 headers. These are the stackable headers. Placed them in their appropriate spots based on their number of pins. Flip the PCB over and repeat the same process. Tack one pin of each header into place. Make any adjustments if necessary. Then solder the rest of the pins.

Non-stackable Header and Stackable Headers
Non-stackable Header and Stackable Headers
There is where the 8 pin header goes
A placed 8 pin header
The flipped PCB
Pin to tack
A tacked 8 pin header
Double checking the alignment
A soldered header
The rest of the headers
The rest of the headers placed
Tacked headers
Double checking the headers
All the headers soldered

Solder MOSFET 

The last component is the MOSFET. This is polar so the orientation matters. Place the MOSFET in the bottom middle with the metal side facing away or off the PCB. Flip over the PCB and solder all 3 leads. Once soldered, trim all 3 leads of the MOSFET.

Metal side facing out
Metal side facing out
Ready to solder
A soldered MOSFET
Trim leads
Finished PCB!

Motor and Switch Prep 

The PCB is all done but before we move on to the Mechanical Assembly, two parts need some work. The first is the vibration motor. First, strip off some of the insulation surrounding the two wires coming from the motor. Next, take about 8 inches of the red and black hook up wire and strip that too. Twist one of the stranded wires together with a wire coming from the motor and solder them to make a more permanent connection. Remember to heat up the wires before you try and apply solder to them. Do this for the other set of wires too.

The vibration motor
The vibration motor
Tiny stripped wires
Stripped hook up wire
Motor and hook up wire
Soldered together
And the other

Now we must do the same thing to the microswitch. Start by taking a new length of the red and black hook up wire and strip a bit off each side. IT doesn't maker which color is used. Feed one stripped end through one of the holes in the tabs of the microswitch. The middle tab will not be used. Apply solder to connect the two. Using the remaining wire, feed that through the unpopulated tab of the micro switch and solder that too.

The microswitch
The microswitch
Stripped hook up wire
switch and hook up wire
Soldered together

That's most of the electrical assembly but don't put your soldering iron away yet. We'll need it to solder the other end of those wires.