Smartphone gaming grip with screen magnifier

Smartphone gaming grip with screen magnifier

Favourite projects, Gadgets, Popular posts, Smartphone

3D model of a universal gaming controller for smartphones with screen magnifier

This is the updated version of our smartphone gaming controller with a screen magnifier for the best gaming experience. Download for free an adjustable gaming grip for smartphones or light consoles with nice fitting and ergonomic design as it was the previous model but now live the gaming experience magnified. This game controller was printed with a carbon filament and can be adjusted in various smartphones; up to 5-6 inches smartphone. The previous version can fit larger smartphone downloading and printing the ‘long holder’ and using longer springs. If you have printed the previous version, the only thing that you need to print is the left and right part 3.

Free 3D model of gaming pad with screen magnifier
Rendered view of a gaming pad 3D model with screen magnifier holder

 

Free 3D model of gaming pad with screen magnifier
Front view of the 3D printed gaming pad with screen magnifier

Use of a spring or even a simple rubber.

Back view of the 3D printed gaming pad


Handle Left/Right Part 1

Supports or rafts

This part does not need supports or rafts.

Perimeters

Use of three lines perimeter.

Layer Height

Medium. Lower layer height makes smoother surfaces.

Printing speed

High printing speed with low printing for the last layers.

Travel speed

High.

Handle Left/Right Part 2

Supports or rafts

This part does not need supports or rafts.

Perimeters

Use of three lines perimeter.

Layer Height

Medium. Lower layer height makes smoother surfaces.

Printing speed

High.

Travel speed

High.

 


Handle Left/Right Part 3

Supports or rafts

This part does not need supports or rafts.

Perimeters

Use of three lines perimeter.

Layer Height

Medium. Lower layer height makes smoother surfaces.

Printing speed

High.

Travel speed

High.

Holder

Supports or rafts

This part does not need supports or rafts.

Perimeters

Use of three lines perimeter.

Layer Height

High.

Printing speed

Medium printing speed. At the last layers probably there is a need for lower speed because the part can be detached from the vibrations.

Travel speed

Medium travel speed, because the extruder nozzle can unstack the part.

DOWNLOAD DESIGN: LINK
COMPONENTS:
(1X) MAGNIFIER SHEET 180X120 (MM)
(7X) BOLTS 3MMX10MM
(1X) NUTS 3MM
(2X) SPRINGS OR SIMPLE RUBBERS
(1X) CARBON FILAMENT


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VR headset (fully 3D printed)

VR headset (fully 3D printed)

Favourite projects, Gadgets, Popular posts, Smartphone

3D printed Virtual Reality gear

Our target was to design a VR headset that can be fully 3D printed. The soft parts such as the straps and foam can be printed using a flexible filament. However, the real challenge was to design it in a way that it doesn’t need any screw or another external component (this needs few drops of glue only). Use of lenses at 37mm. The first version can be found at the end of the post. The length of the smartphone should be at 140mm approximately. This VR headset is fully adjustable, but if you still have a small issue with the focus try to switch places on the parts 2a and 2b. There are two types of straps with length at 190mm and 250mm. Using the short straps, there are extensions (part 9) that should be printed also. This model is better than a simple Google Cardboard or a VR box and improves the experience of the virtual reality games.

Free 3D model of VR gear for 3D printing
Rendered assembly of a fully 3D printed VR headset
Free models of a fully 3D printed VR headset
3D printed of a VR headset
Free 3D models of fully 3D printed VR headset
Assembly of a 3D printed VR headset

 

(1x) PLA filament
(1x) Flexible filament
(1x) BiConvex Lenses 37mm x 45mm
Download Design: Link
Print List:
(1x) Part 1
(1x) Part 2a
(1x) Part 2b
(2x) Part 2c
(2x) Part 2d
(1x) Part 3
(1x) Part 3a
(2x) Part 3b
(1x) Part 4
(1x) Part 5
(1x) Part 6: Use of Flexible filament with 10% to 50% infill density
(3x) Part 7: Use of Flexible filament with 10% to 50% infill density
(1x) Part 8: Use of Flexible filament with 5% infill density (it makes it like a sponge)
(2x) Part 9: Use of Flexible filament with 10% to 50% infill density


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Pencil holder – A man with a shield

Pencil holder – A man with a shield

Desk, Favourite projects, Home/Office, Popular posts

3D model of a pen holder shaped as a man with a shield

This pencil holder represents a not so brave warrior with a shield and pencils as arrows. It was printed using a wood filament, which contains 40% percent wood and 60% PLA. The extruder’s temperature should be at 180 degrees and the finish of the object looks like is made of wood. During the printing with the wood filament, the 3D printer needs low speed, especially for more complicated models because of the lack the filament’s strength.

Free 3D model of a pen holder for 3D printing
3D printed pencil holder shaped as a man with a shield and pencils as arrows
Free 3D model of a pencil holder
Another view of a 3D printed pencil holder shaped as a man with a shield and pencils as arrows

Free 3D model of pen holder for 3D printing
Assembly of the pen holder

Supports or rafts

This part does not need supports or rafts.

Perimeters

Use of three lines perimeter.

Layer Height

High.

Printing speed

High printing speed but low speed for the last layers of the parts that contain probes for the assembly.

Travel speed

High.

Download Design: Link
(1x) Wood filament


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3D printed force/pressure sensors

3D printed force/pressure sensors

Electronics, Favourite projects, Gadgets, Popular posts

Make low cost 3D printed sensors

Recently, advanced conductive materials have been presented for the 3D printing of electrical circuits. These new types of materials have extended the possibilities of 3D printing. A low-cost conductive filament with high resistivity can be used for various low-voltage applications such as force/pressure sensors. When pressure is applied, the contact area between the two conductive materials is increasing and the total resistance is decreasing (Fig 1).

 

 

Figure 1. The structure of the sensor.

The simplest circuit for the measurement of the voltage output is illustrated in Figure 2 and 3. This connection called as a voltage divider. In this circuit, a 10 kOhms resistor was used.

Figure 2. Voltage divider.

Figure 3. Circuit connection

 

Below you can find download links for the STL files of the sensors for a 3D printer with a dual or single extruder (Fig. 4 & 5). Using a single extruder, each printed layer should be glued.

Figure 4. 3D printed pressure sensor with a dual extruder.

Figure 5. 3D printed pressure sensor with a single extruder.


To test the pressure sensor, a calibrator was developed (Fig. 6). STLs of the calibrator are also included at the end of this post.

 

Figure 6. The structure of the calibrator.

 

Applying 5 weights (each one was 1 kg) in a pressure sensor printed with a dual extruder, the measurements were extracted (Fig. 7).

 

Figure 7. Applying 5 weights.

The results are not linear, they follow an inverse exponential attitude. In higher values, more force is needed for less change of voltage. Every printed sensor does not present the same behaviour, the voltage output could be different for each one. However, the produced 3D printed pressure/force sensors have similar behaviour with commercial Force Sensitive Resistors (FSRs) sensors and with minimum cost; each one is estimated in a few cents.

Code (Output voltage):

float reading = 0;
int dt = 20; 
unsigned long t=0;    

void setup() {
Serial.begin(115200);
}

void loop() 
{
t=millis(); 
 reading = analogRead(0);

 Serial.println(reading*(5.0/1023));


while((millis()-t) < dt) // Making sure the cycle time is equal to dt
  { 
  // Do nothing
  }

}

 

One way to calibrate the sensor is by applying weights and recording the output voltages. After, using interpolation the relative weight or force can be estimated. More weights yield better accuracy. Calibrator code can be downloaded at the end of the post. The code is based on repetitive procedure asking a weight and calculating the average voltage. Finally, a smoother could be employed for better results.

 

Components:
Modules:
(1x) Arduino Uno
(2x) 50cm Double-ended Crocodile Clips Cable Alligator Clips
(1x) Resistors
Force sensors:
(1x) Conductive filament
(1x) PLA filament
Calibrator:
(1x) PLA filament
(3x20cm) 10mm Threated rods
(18x) 10mm nuts
(1x20cm) 18mm tube 
(6x) 3mm bolts
(6x) 3mm nuts
(2x) 4mm bolts
(2x) 4mm nuts
Download Designs: Link
Download Code (Calibrator): Link


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