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Multiplexer Circuits / Scanner Circuits
Last Updated on: Friday, March 12, 2010 12:07 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

220V live Wire-in-Wall scanner - This little circuit will help you to scan  line of a 220V live wire in  wall.  FET gate is connected to a capacitive metal sensor (which is usually a simple metal plate). When you hold  sensor close to  wall,  LED will indicate  current flow around where it detects  wire. Works on 9VDC...(electronic circuit added 04/05/06)

48 input×16 output crosspoint IC eliminates the need for multiplexer amps - 02/20/03 EDN-Design Ideas: Crosspoint switches are ideal for use in video-security systems, which accept multiple camera inputs while providing playback and multiple loop-through to multiple monitors. To provide video loop-through or monitor outputs, se systems often require additional multiplexer amplifiers that can drive standard video loads.....(design idea added 02/05)

A Realistic Scanner for Kight Rider ModelsMost people are familiar with the adventures of a certain black Trans-Am with 5000 Megabit memory. This car started life as emotionless and argumentative but by the time it smashed its way through the first episode, everybody wanted to own it…..(circuit added 09/09/09)

ADC Multiplexer Expander works Transparently - 06/20/96 EDN-Design Ideas: When you need to multiplex a large number of analog signals into an ADC—as in medical, instrumentation, and or applications—you may find it difficult to find an appropriate ADC that has enough channels to fit your system's needs. You can add external multiplexers, but se normally require additional control lines from  CPU. Also,  time required.....(design idea added 6/06)

AN-249: over Voltage Protection for the ADG5XXA Multiplexer Series - AN-249 Analog Devices Application Notes  (app note added 6/06)

AN-250: Bandwidth, OFF Isolation & Crosstalk Performance of the AD5XXA Multiplexer Series - AN-250 Analog Devices Application Notes  (app note added 6/06)

AN-35: Understanding Crosstalk in Analog Multiplexers - AN-35 Analog Devices Application Notes  (app note added 6/06)

Analog Multiplexer Uses Flying Capacitors - 01/22/04 EDN-Design Ideas: This Design Idea describes a way to increase  number of analog inputs to your microcontroller for cases in which adding an analog-multiplexer chip or upgrading to a microcontroller with more inputs might be impractical. If  microcontroller you're using has some spare I/O pins and at least one of m is bidirectional or is amenable to tristating, you can configure a simple analog multiple.....(design idea added 10/05)

Analog Multiplexers help Test IS IRQs & DrQs - 12/07/95 EDN-Design Ideas: (design idea added 3/03)

Analog multiplier works over large frequency range - 09/16/99 EDN-Design Ideas: (design idea added 2/06)  

Astable Multivibrator Projects - Astable or free-running multivibrators have been used in home-built amateur radio equipment for many years. The basic circuit is a two stage amplifier with AC-coupled feedback from output to input. One transistor stage is on ( conducting current )....(designed added 08/08/08)

Bandwidth, OFF Isolation & Crosstalk Performance of the AD5XXA Multiplexer Series - AN-250 Analog Devices Application Notes  (app note added 6/06)

Barcode Scanner (intersil) - Intersil Application Block Diagram  (app note added 6/06)

Data Multiplexer Adds Cursor to LED Display Driver - 03/30/95 EDN-Design Ideas: (design idea added 03/03/03)

Fast 10 line to one line data selector/multiplexer comprises only two ICs - 06/11/09 EDN- Design Ideas -.....(design idea added 08/09)

Force/Sense Connection Eliminates Multiplexer on Resistance Error - 01/22/04 EDN-Design Ideas: Digitally controlled gain is an everyday analog-design element. You frequently find this element in an op-amp-based, transimpedance current-to-voltage converter. When you design digital gain control into such a converter, the usual scheme is to arrange things such that a digital multiplexer selects the appropriate feedback resistor for each gain figure.....(design idea added 1/05)

Garage Door Opener Scanner - [The opener] uses a 555 timer as a pulse generator to transmit pulses to a binary counter.  Each pulse will increment the binary counter by one.  You can adjust the speed of the counting by turning R1.  Go ahead and experiment to find just the right speed to use.  Switch one is for resetting the count back to the beginning. (added 11/06)

LMH730276 4:1 Multiplexer Evaluation Board - National Semiconductor Application Note  (app note added 6/06)

LMH730277 2:1 Multiplexer Evaluation Board - National Semiconductor Application Note  (app note added 6/06)

Low Cost RS232C Multiplexer Serves as Multiport Adapter - 03/01/96 EDN-Design Ideas: (design idea added 03/03/03)

LTC1390: A Versatile 8-Channel Multiplexer - DN112  Design Notes (Linear Technology) (app note added 1/06)

Maximum Voltage Sorter uses Analog Multiplexers - 09/29/94 EDN-Design Ideas: The voltage-sorting circuit in Fig 1 continuously finds the maximum of eight input voltages and the corresponding binary address with the aid of two analog multiplexers, IC1 and IC2. The circuit compares each input sequentially with the current maximum voltage and updates the maximum voltage and address when it finds a new maximum.....(design idea added 3/03)

MicroController multiplexes six Digital potentiometers - 05/11/00 EDN-Design Ideas: (design idea added 2/06)

Multiplexed programmable gain track & hold Amplifier has instrumentation inputs - 05/28/09 EDN- Design Ideas,  This ADC front end implements the standard ensemble of functions.....(design idea added 08/09)

Multiplexer Amplifiers form large multiplane multiplexer structures - 12/26/02 EDN-Design Ideas: The variety of video sources available to a home-video-switching system has grown from a few composite inputs to many multisignal sources. These sources include cable, HDTV, satellite dishes, VCR, DVD, video games.....(design idea added 1/05)

Multiplexer Creates Mixed Signal Scope Input - 01/16/97 EDN-Design Ideas: When you work with mixed-signal designs, it's often useful to view the timing of several analog and digital channels on the scope at once. Figure 1 accomplishes this task using two buffered multiplexer ICs and two TTL logic.....(design idea added 08/05)

Multiplexer enables pseudomultidrop RS232 transmission - 09/28/00 EDN-Design Ideas:.....(design idea added 11/05)

Multiplexers convert deep FIFO buffer to bidirectional  - 12/04/97 EDN-Design Ideas: (design idea added 2/06)

Multiplying DAC makes Programmable resistor - 06/24/99 EDN-Design Ideas: (added 2/06) 

Mutliplexing technique yields a reduced pin count LED display - 10/16/08 EDN-Design Ideas: ,  Adding a few discrete components to the output lines of a microcontroller allows you to control 2–N×(N–1)LEDs using only N I/O lines.....(design idea added 08/09)

Over Voltage Protection for the ADG5XXA Multiplexer Series - AN-249 Analog Devices Application Notes  (app note added 6/06)

PIC Based RS485 Multiplexer - Recently, I had to design a circuit real quick that transmitted 4 parallel TTL data bits over 350m of twisted pair cable. I needed to feed in four parallel data bits at one end, and get 4 parallel data bits out the other end, completely transparent to the transmitting and receiving circuits....  (added 11/05)

Printer Port Controls Video Multiplexer - 08/01/96 EDN-Design Ideas: (design idea added 6/06)

ScanMaster - Add this easy project to your regular scanner or DX'ing apparatus and never miss action again.  Or use this system to check a range of frequencies for band activity when you're not there.  I use it to check a range of 'secret' frequencies overnight when I'm sleeping.  Works for me.(Tony van Roon's circuit / schematic added 2/06)

Scanmate Audio Activated Recorded - (Tony van Roon's schematic / circuit added 10/02)

Serial Control Multiplexer Expands SPI Chip Selects - Maxim Application Notes / 210 / Nov-08  (app note added 5/08)

Shortwave converters for scanners - ….(design added 03/08)

Tiny RGB Video Multiplexer Switches Pixels at 100MHz - DN205  Design Notes (Linear Technology) (app note added 6/06)

Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer - National Semiconductor Application Note  (app note added 6/06)

Video Multiplexer uses High Speed OpAmps - 08/21/03 EDN-Design Ideas: Video multiplexers route video from several sources to a single channel. Low-end consumer products use CMOS analog switches and multiplexers, such as the 4066 and 4051. Unfortunately, these devices have a series on-resistance that ranges from approximately 100Ω to 1 kΩ, a resistance.....(design idea added 12/04)

Voltage Regulator controls scanner Lamp brightness - 05/13/99 EDN-Design Ideas:.....(design idea added 11/06)


 
 
 
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