Fixed Price: $1,000 - $5,000
| Posted: Mar 11, 2014 | Ends: 13d, 17h |
Research Project for Electronic Engineer This product has various names in the internet and various brands too.. Im not concerned with the brand, just learning the technology in general.. 1. Apartment directory call box 2. Multi-Family Door Entry 3. Telephone entry systems Research Project Request: This older technology unlocks the front door to many buildings etc.. From what little I understand, it sends a Phone "Tone" single to the electronic door lock mechanism that then unlocks the door when the person that is being buzzed "Called" on their phone is rang. When that person hits the correct button to unlock the door (Any button can be programmed to unlock) as long as its programmed into the box unit. Again, when the correct tone is recognized the door unlocks. My Goal To have enough research so that I can understand how technology works and furthermore, use a cell phone to send the (same tone) correct single without the old brain box. Perhaps make and mobile ph...
Hourly Rate: Not Sure
| Duration: 1-3 months
| Posted: Feb 17, 2014 | Ends: 36d, 21h |
Following not finally firm model - differente volumes. : Tank Self-supporting pressure vessel made of aluminium. Compartments 1 Manholes 6 x DN 450 Operating parameter Test pressure: 3 bar Operating pressure: 2 bar Operating temperature: -40°C / + 80°C Approval by regulation of DOW-Chemical. Aluminium top airline 2". Tipping equipment Hydraulic ram in front of tank. Discharge Pneumatic, with special FFB discharge bowl DN 800 made of electro-polished stainless steel. FFB special aeration inlet made of electro-polished stainless steel or aeration pad. Material outlet DN 150 with butterfly valve, reduced to DN 100 with Rosista coupling and blank cap. Airline Common aluminium airline 3". 4" electro-polished stainless steel manifold pre-fitted for later fitment of an 5 micron filter. 2 mechanical safety supporting legs at rear of chassis. Chassis Special aluminium alloy chassis, welded and bolted Catwalk Aluminium catwalk, 400 mm wide, handrail and ladder made o...