Fabless supplier of power efficient x86 processor. VIA has a spread
of Components, Boards and Systems for PC, Portable Devices and Embedded
Solutions. VIA processors are designed by Centaur Technology, a wholly
owned subsidiary of VIA Technologies, Inc. based in Austin Texas.
VIA Technologies - Motherboard chipsets - https://www.viatech.com/
Energy-saving processors with digital media chipsets, along with
connectivity/networking and multimedia elements make VIA Boards and
Systems Complete Computing Modules packed with power in a small
stands for "Very Innovative Architecture". VIA acquired most of Cyrix,
then a division of National Semiconductor, and also Integrated Device
Technology's Centaur, marking its entry into the x86 microprocessor
market. - Via at Wikipedia
VIA Nano X2 processors are the first truly optimized, low power
dual-core processors. Combining two 64-bit 'Isaiah' cores in one die,
VIA Nano X2 processors deliver industry leading performance-per-watt and
improved multi-tasking ability, without consuming more power.
VIA Nano X2 Processor - VIA Technologies
Headquartered in Taipei, Taiwan,VIA is registered on the Taiwan Stock Exchange TSE 2388.
Supplementary to EMI/RFI/EMC Immunity of an Equipment. Many
Installations are subject to Highly Disruptive Electrical Environment
not just EMI. Depending on the budget and the situation a solution has
to be found. Sometimes a CVT or an Isolation Transformer can do a lot of
Converting all Energy inputs to battery energy and having a
Isolated Synthetic Sine Supply may be an expensive but good solution.
Either way the devices that face the harsh environment have to be over
rated along with these protections. - delabs design Notes
Abstract-This study examines the design and construction of AC
Electronics load surge protection in order to carry electric surge load
arisen from faults in low voltage electricity system (single phase/220V)
by using the principle of electronics load clamping voltage during
induction period so that electric voltage could go through to safe load
and continue to work. The qualification of the designed device could
prevent both transient over voltage and voltage swell.
(A question answer thread of delabs.net, nearly a decade old)
Presettable Up-Down counter-timer I am looking for a schematic for a pre settable Up/Down counter that I can build for my church. It needs to be 5 decades. From 0:00:00 to 9:59:59. I ran across your web pages while searching for such a schematic. Can you help me out?
Presettable Up-Down counter-timer-Answer
It appears from the "9:59:59 " you have mentioned, what you need is a timer.It it a count up and count down timer you need, like a clock ?
Can you explain to me how you plan to use this circuit in the church.Visit the links below and see if that is what you want.
Presettable Up-Down counter-timer-Reply Thanks for the links. What I need this count down timer for is to allow speakers at the church to know how much time is remaining of their presentation. All of our speakers are taped for later use or review. The speakers giving the presentation usually go over their time limits for the audio tapes. With this unit I am trying to build time can be entered by preset thumbwheel switches. The counter is then started and times out when the counter reaches 0:00:00.
What makes this count down timer different is there will be two seperate displays. A one inch set of seven segment LED's will be in the main console with the rest of the logic. There will also be a 2.5 inch set of seven segment displays remotely connected (anout 3 feet away). The large displays will be what the speakers will see. The small displays will be in the control booth.
I already have the following items gathered up. I am hoping to use these components if I am able. I have the MC14029, the MC14513, the Allegro UDN2597A (to drive the large LED's), the Dallas Semi DS32KHz time base, the MC14020, the MC14013, the large and small LED displays, and the thumbwheel switches (set to 9:59:59 maximum)
I also have some MC14011, MC14490 (Hex Debounce Switch Controller, MC14049, and the R's and C's necessary to complete the circuit.
Does this explain what I am trying to do? I think the MC14029 counters can be used to do all the counting and store the preset values. All I have to do is add the reset at 6 for the tens of seconds and the tens of minutes. However, I don't know how to connect the logic?
The DS32KHz, MC14020 and MC14013 will generate the 1 Hertz (1PPS) signal. That is about all I currently have. That is why I need some help
EE Presettable Up-Down counter-timer-Answer
Circuit 1 - Digital Timer Clock With Preset using Thumbwheel switch.
Circuit 2 - 1 Hz or 1 pps crystal clock using CD4060 and 32768 Hz Crystal.
They have not been tested much... The 4513 control pins 8-4-5-3 connections verify, as i did not get the datasheet.
the circuits will work as concepts are right, but some tweaks in R C values may be required.
the R C values can only be corrected if you have problem in making it work.
the main problem in the R C values may be related to "the reset at 6 for the tens of seconds and the tens of minutes". tell me what changes you may want. this is a presettable count down timer upto 99.59.59 hours.minutes.seconds
I would like to know if you offer a monitoring solution that will constantly measure ambient (air) temperature (say, 0 to 150°F), and provide a corresponding DC voltage output of either 100 mV, 1 V, 5 V, or 10 V. Do you make a unit that can be configured to do this?
Mail From JPE - WV - US
Analog outputs were very popular as they are inputs to Strip Chart Recorders, Later they had an extra use for PC Based Data Acquisition, data Loggers and PLC. Now we have Instruments with digital and wireless outputs too.
Temperature Meters - DP116 - Omega
Economical 3/64 DIN panel meter that has a full size 0.56" green or red LED display, with a built-in analog output and display hold capability. 3 1 /2 Digit Display.
Thermocouple and RTD Input
Full-Size 0.56" (14.2 mm) LED Display
Analog Output Standard
1 /8 DIN Panel Adaptor Standard
Economical Digital Meters DP18 - Omega
The DP18 series is a complete family of panel meters with input cards for voltage, process and temperature measurement and control. The signal conditioners for voltage will measure ac or dc voltages or true RMS.
Modular Design, Options for Alarms, Analog Output of Communications, 3 1/2-Digit LED Available in Red or Green Displays
Mains Strip Board should have protection, The EMI RFI filter, Varistors
can help. Earthing and Lightning Arrestors should be good in the
The Blue ones are MOV Metal Oxide Varistors, sometimes they fail as a
short circuit, so better to use a fast blow fuse. Then you see Gas Tube
Arrestors that are even used in a Landline Terminal Box.
A Surge Arrester
is a device to protect electrical equipment from over-voltage
transients caused by external (lightning) or internal (switching)
events. Also called a surge protection device (SPD) or transient voltage
surge suppressor (TVSS),
Line-Filter - A
special class of capacitor is used in power-line (mains) filters. Line
filtering is a very tough application for a capacitor.
Achieving EMC for Dc-Dc Convertors - DC-DC
converters, whether they be an off the shelf brick design or a discrete
equivalent, are a source of EMI (Electromagnetic Interference). EMI is
unwanted electromagnetic energy that propagates by radiation and
conduction over system signal and power lines.