Low Cost dental Chair Softgoods Design
The task at hand is to find an economic low cost method to manufacture and upholster adult dental chair soft goods. Quality and life of covering must be robust, 10+ year life. The dental chair soft goods typically consist of three major components; underlying support structure, many times this is a vacuum formed plastic element, the seat foam, and the upholstery itself (see attached photos). Dental chairs are normally divided into two main components; 1) The back structure, 2) The seating structure. Key to this design initiative, should include an alternate way of securing the leather to the underside of the chair. Most chairs currently utilize hundreds of staples to secure the fabric, this poses to problems: 1) High direct labor, 2) No way to easily replace the upholstery covering. We are seeking a new innovative design ideas for new methods of manufacture without using staples or typical snap fittings.
Large 3D bookshelf backstop
Inspired by the historical visual progression of mainboards, we are looking for an innovative design to use as the back of a large shelving unit.
We are looking for a design to go in a display case. The display case will then be used as a holder for glass shelves.
Think of it almost like a glass bookshelf. Except, instead of the back being a cheap piece of board held on with tack nails like a shelf from IKEA, the back will be the design you come up with.
Dimensions:
8ft wide
3ft high
1-3in deep
The case is being used to display tech items. So we would like the design to reflect technology. Think mother board but on our scale.
The original thought was to collect old motherboards, including ram and cpus. We were then going to lay them out on a 8x3 piece of plywood and glue them.
Instead of this, we now want to get a design that a CNC machine can make.
Material used:
Wood and old metal.
The design should induce a feeling of technological progression. So from left to right the design should transition from old circuit board tech, to current tech, to possible future tech (this part is open for interpretation)
As an example, in the attached picture, the green part is what we want to replace with our 3D circuit board idea. Please note that the picture is just one from google and does not represent the actual shelf we are building The entire shelf will sit on top of a table, meaning that it will be at eye level for the average person.
Power SPDT Relay implemented with MOSFETS
I am currently using the following relay in a product:
http://www.digikey.com/product-detail/en/te-connectivity-potter-brumfield-relays/RT424024/PB969-ND/1095293
It is a DPDT, non-latching relay rated for 8A switching, and a 24Vdc coil voltage.
The problem: The "clicking sound." This is for a home audio application, so we need it to be silent.
I am looking for a silent version, using MOSFETS for example, built onto a daughter board (PCB) with the same footprint and pin-out as the relay.
Note - I only need SPDT capability (I tie the two poles of the DPDT relay via on the board that the relay is installed onto).
One side of the relay coil (pin 1) is always tied to 24V. And the other side is either set to 24V or GND via this chip:
http://www.digikey.com/product-search/en?keywords=296-19046-5-ND
(which is controlled by a PIC micro)
Requirements:
- An electrical schematic of the new design
- A BOM of all the parts required
- Gerbers for the PCB daughter board
- Same footprint and pin-out as the RT424024 relay.
Note, for this SPDT version, the following pins will be tied together (12 & 22, 11 & 21, 14 & 24). They are already tied
together on the PCB that the relay currently is soldered to.
- Same 24Vdc "coil voltage" (pin 1 always tied to 24Vdc, and
pin 2 is controlled externally to be 24Vdc or GND via the
external chip mentioned above).
- When the relay is not activated, pins 12 & 22 are connected to pins 11 & 21). When the relay is activated, pins 11 & 21 are connected to pins 14 & 24.
- Use high current MOSFETs (the lower the turn on resistance, the better! Should be able to handle > 25 Amps continuously (ideally > 50 Amps continuously).
- Must have full protection from ESD / over-voltage on every pin.
- There must NOT be 'cross-conduction' of the pins.
- Must be very reliable
- Must be silent switching
- Must be the same footprint and pinout as the relay that it is replacing (Mentioned above). Max. height is > 1 inch (we are only limited by the footprint, not the height).
- Layout software can be whatever you want as long as I can get the PCB gerbers to send to my PCB house.
- BOM should be in a spreadsheet (excel)
- Electrical schematic can be in PDF
EVO mantrap
This is a male chastity device
Cage size
S – A= 42mm B=28mm C=8mm Oval shape*
M – A= 62mm B = 33mm C=10mm Oval shape*
L – A= 92mm B = 35mm C=12mm Oval shape*
XL – A = 110mm B = 39mm C=13mm Oval shape*
XXL – A = 112mm B = 44mm C=15mm Oval shape*
Total cage length
S: 60mm
M: 80mm
L: 110mm
xL: 128mm
xxL: 135mm
Base Ring sizes
40mm
45mm
50mm
55mm
SuperSuv to be hand built for personal use
Off/On Road Super SUV, 3 seater Central driving position like a Mclaren. Rear engined, removable roof which when not in use goes over engine bay. 26 inch rims. Very clean lines. Will use donor lights (pictures included in files). Car must be dramatic with very clean simple lines. Interior must be very simple and clean lines.
I have uploaded many files for inspiration. Countach for rear. Corvette for door treatment. White lotus for air vents. Diablo for roof and body lines.
Pablo Gosso
Designer