This is the laser cut version of the popular Greg's Hinged Accessible Extruder. Unlike the printed version, this extruder offers better heat resistant and is less prone to wear and tear.
This extruder kit supports both 3mm and 1.75 filaments.
Hot End and Nema 17 Stepper Motor are not included in this kit.
- Price: US$7.99/ea;
- Item Location: Taipei, Taiwan;
- Range: ~1000 Meters (@ 5000bps) direct line of sight without obstruction);
- Frequency: 433MHz;
- Operating Voltage: DC 3.3V ~ 5V (when feeding DC 3.3V to the VCC of the module, the module works with Raspberry Pi without the need for level shifting / voltage division);
- Serial baud rate: 1.2Kbps to 115.2Kbps (default 9.6Kbps);
- Interface protocol: UART/TTL;
- At least 2 HC-12 modules are needed to form a complete wireless link.
IMPORTANT - THIS MODULE DOESN'T WORK WITH THE 433MHz Serial RF Module HC-11.
- Price: US$6.99/ea;
- Item Location: Taipei, Taiwan;
- Range: ~100 Meters (direct line of sight without obstruction);
- Frequency: 433MHz;
- Operating Voltage: DC 3.3V ~ 5V (when feeding DC 3.3V to the VCC of the module, the module works with Raspberry Pi without the need for level shifting / voltage division);
- Serial baud rate: 1.2Kbps to 115.2Kbps (default 9.6Kbps);
- Interface protocol: UART/TTL;
- At least 2 HC-11 modules are needed to form a complete wireless link.
IMPORTANT - THIS MODULE DOESN'T WORK WITH THE 433MHz Serial RF Module HC-12.
Filament Winder and Filament Spreader for DIY Filament Extruder
Main Features:
- Motor: DC 12V;
- Support various spool diameter (via adjustable vertical and horizontal position of the driving motor and the driving shaft).
Filament Spreader
Soft start of the motor is implemented in the software to reduce the current spike during motor start up.
Motor Controller for Filament Spreader
The motor controller is a DIY MOSFET H bridge shield using 2 P-Channel MOSFET and 2 N-Channel MOSFET. The 4 white chips are opto-couplers that provide optical isolation to shield the micro controller from the motor noise.
Main Features:
- Input Voltage: DC 12V;
- Motor: Support single channel, DC 12V, 2A / 5A Motor (max. motor current determined by the MOSFET used);
- Protection against reverse input voltage (the red LED will be turned on when reverse voltage is applied to the board);
- Pin and form factor compatible with Arduino Uno;
- Selectable PWM and Direction Control pins via jumping wires;
- DC 5V PWM and direction control signal;
- Optical isolation of PWM and direction control signal.
Working together - Filament Winder + Filament Spreader
The video below shows the working of Filament Winder + Filament Spreader. The synchronization of the spreader's movement with the spool's rotation is done by the hall effect sensor.
DIY filament extruder kit for making filament from raw or used material for 3D printing
The following items are not included in the kit and they need to be provided by the user.
- A 12V, 30A DC Power Supply;
- A 3D Printer with 20cm x 20cm x 20cm printing envelop (for printing the Hopper and the Hopper Base), the STL files will be provided;
- 18 AWG stranded copper wires (red, black, yellow, blue) - the length of the wire is depending upon how you arrange the extruder, power supply, and the control unit. (for my case, 4-meter for each color is more than enough);
- Power sockets and plugs;
- Basic hand tools (wire cutter, screw drivers, pliers, etc.);
- Solder, Soldering Iron, Solder Paste. Note,
As the characteristics of material vary significantly, care must be taken to work out the optimal extrusion conditions (extrusion temperature, extrusion speed, pressure inside hopper, etc.) to achieve the desire result.
Warning!! This machine must be operated in a well ventilated area and be attended by an operator constantly to minimize hazards (fire, toxic fumes, etc.).
Bed Exit Detection System With Wireless Remote Alarm Receiver
The system detects bed exit and wirelessly transmits bed exit alarm to a remote receiver. Upon receipt of the bed exit alarm, the remote receiver gives out warning in the form of light indicator and warning tone. To avoid disturbing the person receiving care, the system located at the care recepient’s site only gives out warning in the form of light indicator. The person receiving care doesn't need to wear any equipment and the bed doesn't need to have any kind of sensing pad on it.
Wireless Link Lost Detection:
The system is equipped with wireless link lost detection function. In the event of wireless link lost or the system at the care recepient’s site is powered off, the remote receiver will give out alarm in the form of light indicator and warning tone.
Input Power:
This system draws its power from the main power supply (using AC110 ~ 220V to DC 9 ~ 12V adaptor). In the event of main power outage, the system can be powered by DC9V battery (see photo below).
Wireless Transmission Distance:
The max. distance between the Base Station and the Remote Receiver is about 50 meters (~164 feets) in an open and unobstructed environment. In a typical reinforced concrete building, it has been tested that the Base Station and Remote Receiver could communicate properly when they are separated by 1 to 2 floors (2 concrete floors or walls) (note: the wireless transmission distance may be greater or shorter depending on the material in the wall or floor and other environmental factors).
The maximum distance between the Bed Exit Sensor and the Base Station is approximately 8 meters (~26 feets).
Description of System Components
Bed Exit Sensor x 4
It’s placed on the floor next to the bed to detect bed exit.
Base Station x 1
It powers the Bed Exit Sensors and relays bed exit alarm to the Remote Receiver wirelessly.
Remote Receiver x 1
It monitors wireless link status and bed exit alarm and gives out alarm in the form of light indicator and warning tone.
How to use the system
1.Connect the Bed Exit Sensors to the Base Station using the RJ-11 cables provided. (note, when using RJ-11 cable from other source, be sure that it’s a 2-pair, crossed-over cable with cable length less than 8 meters (~26 feets)) ;
2.Place the Bed Exit Sensor on the floor near the bed with the face that has 2 round holes facing the far end of the bed (see below disgram). The effective range of the Bed Exit Sensor is about 2.5 ~ 3 meters (less than 9 feets) (the distance from the holes to the bottom of the dashed triangle), the detection angle is around 30 degrees (the angle at the top of the dashed triangle).
Note,
·The unused sensor may be placed next to another sensor to increase the coverage area (as shown above on the right);
·The unused sensor may be placed on a bedside table to serve as a wireless bell for calling for help (the sensor can be triggered by blocking the 2 round holes with hand or other object).
Alternatively, the extra sensor can be place next to the bed room door to sense the opening of the door and send out the alarm..
3.Power on the Base Station (note, please make sure that no one is standing in the detection range). When the Base Station is powered on, its green indicator light will flash ten times (note, the system is calibrating itself during this time). And the red indicator light will be steadily on (note, this indicates that the wireless link with the Remote Receiver is lost).
Note, it is recommended that the Base Station and Remote Receiver be powered off / powered to re-calibrate the system every time after the care recipient gets in the bed (because the objects within the detection range may have been changed since the last calibration).
4.Power on the Remote Receiver. The Remote Receiver may generate warning tone and the red indicator light may be on constantly (note, this indicates that the wireless link between the Base Station and the Remote Receiver is lost). If the wireless link is alive, the warning tone will stop and the red indicator light will start flashing within 10 to 20 seconds automatically (at about once every five seconds).
If the warning tone doesn’t stop or the red indicator light remains on for more than 20 seconds, please refer to the below flow chart for simple troubleshooting.
What to do when the Link Lost indicator on the Remote Receiver doesn’t stop for more than 20 seconds
5.When Bed Exit Sensor is triggered, the green indicator light on the Base Station will be turned on. At the same time, the warning tone and the green indicator light on the Remote Receiver will be turned on as well. In the event that the Bed Exit Sensor is not triggered again, the warning tone will stop within 10 seconds but the green indicator light will remain on until the reset button on the Remote Receiver is depressed and released. When the reset button is depressed and released, the green indicator on the Remote Receiver will be turned off and the green indicator light on the Base Station will also be turned off within 5 to 10 seconds.
Description of system components
Bed Exit Sensor
Base Station
Remote Receiver
Demo Videos
Powering Up the Base Station
Link Alive Indication & Sensor Triggered Indication
Link Lost Indication And Auto Recovery From Link Lost
The Milky Way is the galaxy that contains our Solar System.
The Milky Way is a barred spiral galaxy that has a diameter usually considered to be about 100,000–120,000 light-years[28] but may be 150,000–180,000 light-years.[29] The Milky Way is estimated to contain 100–400 billion stars.[30][31] There are likely at least 100 billion planets in the Milky Way.[32][33] The Solar System is located within the disk, about 27,000 light-years from the Galactic Center, on the inner edge of one of the spiral-shaped concentrations of gas and dust called the Orion Arm. The stars in the inner ≈10,000 light-years form a bulge and one or more bars that radiate from the bulge. The very center is marked by an intense radio source, named Sagittarius A*, which is likely to be a supermassive black hole.
