May 16, 2011 01:30 PM Eastern Daylight Time
SANTA CRUZ, Calif.–(BUSINESS WIRE)–Redfish Instruments, Inc., a provider of iPhone- and iPad-enabled electronic test and measurement equipment, announced today the introduction of the iDVM™ Digital Multimeter. The iDVM multimeter wirelessly connects to an iPhone, iPad, or iPod Touch via an ad hoc wireless network allowing users to acquire, visualize, and share electrical measurement data on their Apple devices. The iDVM app can be downloaded free from the Apple App Store.
“The unique pairing of the iPhone or iPad with a digital multimeter provides a user experience that is truly revolutionary. not since the advent of the LCD has the multimeter been so substantially enhanced.”
According to Patrick O’Hara, Redfish Instruments’ president and CEO, “The unique pairing of the iPhone or iPad with a digital multimeter provides a user experience that is truly revolutionary. not since the advent of the LCD has the multimeter been so substantially enhanced.” regarding the market opportunity, mr. O’Hara commented, “The iPhone and iPad provide a known user interface that permits customers to interact with electronic test and measurement tools that was not possible prior to this post-pc era. We believe that our new iDVM voltmeter is the first of many new uses for this tremendous interface; we’re excited to be an early pioneer.”
Traditionally, multimeters have not provided an easy method of exporting or saving data. The iDVM permits a user to log data over an extended period of time using the iPhone or the iPad as the storage device. for example, service engineers can use the iDVM to collect data and store it in a report for submission to their clients, or keep the data on the voltmeter for their own records. using the GeoTag feature of the iPhone or iPad, service engineers can even identify their location as part of the data. The iDVM is built in the USA using all USA-made parts, and uses rechargeable batteries.
The iDVM was designed for a wide range of users—from automotive technicians, to advanced embedded systems engineers, to electrical or building contractors, to field service workers.
About Redfish Instruments, Inc.
Redfish Instruments is a manufacturer of iPhone, iPad, and iPod Touch enabled electrical test and measurement systems, serving North American customers from its headquarters in Santa Cruz, CA. for more information about Redfish Instruments and its products, visit: redfishinstruments.com.
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Temperature Characteristic: ±0.1%C
Photo detector type: Silicon Photo Diode with Filter
Operating temperature: 32-104 degrees F (0-40 degrees C)
Sampling rate: 2-3 times per second
Battery life: 200 hours (estimate)
Dimensions: 149 x 71 x 41 mm
Photo Detector Dimensions: 100 x 60 x 28 mm
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Practically accomplished. It applied 5 0 pentodes in parallel because the pass component. as a way to work properly, theelectrical power provide requires a minimum of an extremely smaller electrical load connected to it.
If you already have a regulating transistor in position, you are able to in all probability make a minor comperator thatcompares your set recent (a reference voltage) from the measured voltage (representing your present).You are able to apt to be critically harm, so be very careful. ( ATX to Lab Bench Energy OfferConversion ). Felipe La Rotta from Engallamientos de La Rotta has built numerous cool Diy assignments,this Diy Bench Ability Offer is just one of my favorites. Suppose you are breadboarding a circuit that’s meantto become run off a V battery?
here is the full schematic (PDF file). ) All right! The circumstance pattern includesbanana/screw terminals,DPDTswitches, a 0K potentiometer,LEDs,male bananna plug (for the voltmeter),LED panel displays purchased fromHong Kong, andscrew/female bannana terminals for the outputs and ground. when you restrict the grid voltage,you limit the current. For those who make this supply you is going to be impress how good it is really do the job. the following may be the entireschematic (PDF file). Here is a close-up from the Ilimit change and the zeners: due to the fact I am cheap, it wasquite simply a junk-box assemble.
The 0V Energy our prime existing for the output and also the 0V electric power all the remaining circuit. It applied five 0pentodes in parallel as the pass aspect. Techniques Collect the types of materials needed and construct the circuitin the circuit diagram. I actually needed to open it to determine what wires ended up what voltage. That being reportedgoogling for ‘foldback present-day limiting’ in particular on google books need to give you all the informationyou need. ( MyOpenPC Dragon Check Bench Critique and make Log – Overclock.web – Overclocking.internet ) ( . Theend-user will enjoy its set of features and functionality as the casual onlooker is going to be wowed by itsaesthetic uniqueness and appeal.
Its capacity to hold 4 .” HDDs is really a welcome attribute. This assumes you do solid-state bridgerectification as I did; if you wanna use tubes, you’ll need to account for that. Goods cannot usuallybe accurately judged by their technical attributes alone.
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It is an electrical power transformer from the Tektronixo’scope. Needless to say you can do this with triodes, however theoptimum output voltage could be reduced. a further aspect advantage of pentodes is that you can do a simple,brain-damaged half-assed present restrict simply by taking advantage of the nearly horizontal plate curves ofthe pentode. The output have many transistor since the opamp are not able to give a lot of recent, and note thatthe resistor R is very important, this one will safeguard your output transistor from the output short circuit“transistor explosion is faster than the current sense”. That is the filament energy that would go to the frontpanel jacks. when you restrict the grid voltage, you restrict the current. please you can publish anyqueries or feedback. An additional facet advantage of pentodes is that you can perform a very simple, brain-damaged half-assed present limit simply by taking advantage of the virtually horizontal plate curves from the pentode.
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If you build this supply you will be impress how good it truly is perform. so this layout includes a switch-selectablegrid voltage restrict (implemented with zener diodes) that provides a crude present limit operate. okay!For any linear supply i would suggest utilizing a foldback recent limiting scheme, specifically on a thingwhich has a tendency to be shorted/over driven as frequently like a bench provide.
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