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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) |
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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) |
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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) |
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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) |
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AN-249: over Voltage Protection for the
ADG5XXA Multiplexer Series - AN-249 Analog Devices Application Notes (app note
added 6/06) |
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AN-250: Bandwidth, OFF Isolation & Crosstalk Performance of the AD5XXA Multiplexer
Series - AN-250 Analog Devices Application Notes (app note added 6/06) |
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AN-35: Understanding Crosstalk in Analog Multiplexers - AN-35 Analog Devices
Application Notes (app note added 6/06) |
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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) |
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Analog Multiplexers help Test IS IRQs & DrQs - 12/07/95 EDN-Design Ideas: (design
idea added 3/03) |
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Analog multiplier works over large frequency range - 09/16/99 EDN-Design Ideas:
(design idea added 2/06) |
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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) |
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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) |
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Data Multiplexer Adds Cursor to LED Display Driver - 03/30/95 EDN-Design Ideas:
(design idea added 03/03/03) |
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Fast 10 line to one line data selector/multiplexer comprises only two ICs -
06/11/09 EDN- Design Ideas -.....(design idea added 08/09) |
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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) |
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LMH730276 4:1 Multiplexer Evaluation Board - National Semiconductor Application
Note (app note added 6/06) |
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LMH730277 2:1 Multiplexer Evaluation Board - National Semiconductor Application
Note (app note added 6/06) |
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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) |
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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) |
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MicroController multiplexes six Digital potentiometers - 05/11/00 EDN-Design
Ideas: (design idea added 2/06) |
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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) |
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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) |
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Multiplexer enables pseudomultidrop RS232 transmission - 09/28/00 EDN-Design
Ideas:.....(design idea added 11/05) |
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Multiplexers convert deep FIFO buffer to bidirectional - 12/04/97 EDN-Design
Ideas: (design idea added 2/06) |
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Multiplying DAC makes Programmable resistor - 06/24/99 EDN-Design Ideas: (added
2/06) |
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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) |
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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) |
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Printer Port Controls Video Multiplexer - 08/01/96 EDN-Design Ideas: (design idea
added 6/06) |
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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) |
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Scanmate Audio Activated Recorded -
(Tony van Roon's schematic / circuit added 10/02) |
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Serial Control Multiplexer Expands SPI Chip Selects - Maxim Application Notes /
210 / Nov-08 (app note added 5/08) |
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Shortwave converters for scanners - ….(design added 03/08) |
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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) |
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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) |
