Quantcast Figure 3-9.Wafer switch

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
3-10 Figure 3-9(A) shows one wafer of a wafer switch and its schematic symbol. Contact 1 is the point at which current enters the wafer. It is always connected to the movable portion of the wafer. With the wafer in the position shown, contact 1 is connected to both contact 5 and 6 through the movable portion. If the movable portion was rotated slightly clockwise, contact 1 would only be connected to contact 5. This arrangement is known as MAKE BEFORE BREAK because the switch makes a contact before breaking the old contact. Figure 3-9.—Wafer switch. Figure 3-9(B) is an illustration of the entire switch and its schematic symbol. Since the switch has two wafers mechanically connected by the shaft of the switch, the shaft rotates the movable portion of both wafers at the same time. This is represented on the schematic symbol by the dotted line connecting the two wafers. The upper wafer of the schematic symbol is the wafer closest to the control mechanism, and is identical to the wafer shown in figure 3-9(A). When switches have more than one wafer, the first wafer shown is always the wafer closest to the operating mechanism. The lower wafer on the schematic diagram is the wafer farthest away from the operating mechanism. Contact 9 of this wafer is connected to the movable portion and is the point at which current enters the wafer. In the position shown, contact 9 is connected to both contact 13 and 16. If the switch is rotated slightly clockwise, contact 9 would no longer be connected to contact 13. A further clockwise movement would connect contact 9 to contact 12. This arrangement is called BREAK BEFORE MAKE. Contact 9 will also be connected to contact 15 at the same time as it is connected to contact 12. Q9.   Label the switch schematics shown in figure 3-10A through 3-10G.


Electrical News
Canada Goose Proves SEO Isn't Always What Matters
Nanette Collins continues on her quest to educate engineers about...
eetimes.com
EEVblog #695 – Mailbag Tektronix 2465 Analog Oscilloscope
Sagan & Dave take a look at a couple of...
eevblog.com
Max's BADASS Display: A Comedy of Errors
A wise man once said that everyone makes mistakes; the...
eetimes.com
MEMS Spurred by Industrial IoT
Industrial uses of microelectromechanical systems (MEMS) still trail consumer ones...
eetimes.com
Tablets for Patients: Pilot Programs Demonstrate Benefits
Patients who use tablets to access to their own care...
eetimes.com
Get Your Kicks at DFT Boot Camp
Engineers at Mentor Graphics provide an introduction to design-for test...
eetimes.com
WiFi to Switch on IoT Appliances
Electrolux says it is one of several white good makers...
eetimes.com
A CTO's View of Comms 2015
Ethernet has a growing role in automotive and industrial networks...
eetimes.com
Become a Measurement Master
Becoming a measurement master, like anything else, takes time and...
eetimes.com
Ten Flash Drives That Will Turn Heads (and Store Your Data!)
Today's flash drives have come a long way with iconic...
eetimes.com
10 Tech Gifts to Buy Your Engineer for Christmas
Here is a list of last minute ideas for making...
eetimes.com
Holiday Movies to Geek Out About
EE Times wants to ensure domestic bliss with a handy...
eetimes.com
Road to Auto Market Paved With Fault-Tolerant SoCs
Data protection and redundancy features implemented across entire SoC designs...
eetimes.com
Boston-Area Engineers to Share Expertise at ESC Boston 2015
In an exciting new session format at ESC Boston 2015,...
eetimes.com
Memory Design Trends in 2014
Memory transitions, increased-density drive design trends: Customers are looking for...
eetimes.com
True 3-D Chips Harness Nanotubes
Stanford University has learned how to stack any number of...
eetimes.com
Top 15 Analog, MEMS & Sensors News From 2014
From faulty MEMS mics to NXP's labor disputes, here are...
eetimes.com
Space Weather Satellite Set for Launch
NOAA's Deep Space Climate Observatory will serve as an early...
eetimes.com
Hackers Go Off-Grid for Power
Hackathon produces designs that could be assembled by villagers with...
eetimes.com
Ten Hot & Cool NASA Innovations
Partnering with industry, NASA has developed new technologies that are...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +