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Re: Vcc, Vdd o Vss?

El jueves, 19 de septiembre de 2002 a la(s) 04:11:27 UTC-3, KT88 escribió: Hola, bueno casi 21 años despues llego hasta aquí, pero es válido igual. Si mi experiencia en casi 20 años,...

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PLL ICs with analog multiplier phase detectors ? Are they still around ?

Is anybody making a PLL IC with multiplier input phase detector that doesn't cost, like $50+ from Analog Devices ? Parts that are active and still being manufactured ? I used to use ones like the...

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Where is the problem likely to be?

All my tv's run off a central location, which used to include cable but now has a DVDR with an amplified antenna that brings in my city and the next one. One tv is supplied a signal through a...

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Przewodzący klej

Chcę połączyć akumulatorek NiMH z elektrycznym przewodem. Mogę lutować -- akumulatorek nie lubi wysokiej temperatury. Mogę zgrzewać -- nie dysponuję zgrzewarką. Mogę kupić akumulatorki z...

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Vektor-Netzwerkanalysatoren

Hallo, es gibt ein paar verschiedene, billige Vektor-Netzwerkanalysatoren in der Preisklasse bis 200 € auf dem Markt, wenn man danach googelt.- Hat jemand Erfahrung mit diesen Billigdingern? Prof....

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Peltier device

Hi, I have a Peltier device, size 40x40mm, marked: ME0B162AG I couldn't find any information about it online. Does anyone know the technical data or the manufacturer ? Sven

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Ch320 et arduino ?

Slt, J’ai recu des copie de arduino, un uno et l’autre nano, avec un interfacage via chipset ch320 ou 340 ! Je me demande pourquoi avant j’ai soip 6 pour maintenant un soip 20 pour faire la meme...

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MQTT QoS vs TCP

I know TCP is able to guarantee the delivery of messages from sender to receiver, without corruption (thanks to checksums), in order and without duplication (thanks to sequence numbers). So I'm...

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Re: Brum i högtalare

Nej

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Frequently Asked Questions All FAQs »

atiny13 to atiny25

I'm in the process of shfiting a board using Atmel's atiny13 to the atiny25. The at25 is causing lots of trouble. First hassle was getting the at25 to accept the "program enable" command. There was no...

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wart overvoltage protection

We make a gadget that's powered by a 12 volt wart, and sometimes a user applies 24 and blows one up. We have a polyfuse and a 12 volt TVS and they sometimes fry the TVS. It's posssible that most any...

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Raspberry Pi Sound card problem electret condenser microphones

I want to process the signals of five electret condenser microphones with raspberry pi and i since the RPI has no audio inputs im thinking of using a sound card. Im looking for a sound card with five...

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Radio Reception - Massive Electrical Interference

Hi! I just moved to an apartment and wanted to keep my radio in the bathroom, same as I did in the last place I lived. Only problem with this place is that the main electrical drop to the building is...

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Rectangular LEDS

I'm thinking of making a Set Theory Clock display for a desk clock and using LEDs for its display. This needs a selection of rectangular red and yellow LEDs, both small stackable ones that could be...

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Driving LEDs with constant voltage

I have some 7-segment displays I'd like to drive from a uP output...the segments have a common cathode. 5 volt digital outputs from the uP are available, and the red LED segments have a forward...

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Controlling alot of LEDs from Arduino or AVR. Maybe 74HC595

I am trying to create a project much like like a Marquee sign, I want to be able to control hundreds of LEDs from a set of chips. From my research I found the 74HC595 chip and using a bunch of these...

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Solved Issues All Solved »

Soldering gun tip - Weller DIY tipreplacement

I have a Weller soldering gun & the tip burned through. Not having a spare, I took a piece of 12ga copper wire and improvised (I know, it won't last long). I find it so fiddly to get the ends bent...

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~ OT? Dust in a computer

Any good solutions to keep the dust out? Anyone doing anything along those lines - and how's it working? I have a desktop that's less than a year old and is packed with dust already. I can't make the...

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Repair of Samsung 55" TV - backlight problem

Friends of mine have a Samsung 55" 4K TV, model UN55HU6840 (about 2014). They say they can hear audio, but the screen is black. I'd like to take a shot at fixing it for them since they don't really...

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Categories

Featured more »

Photodiode bootstrap phase rolloff | It took me a while, but I've arrived at a design I'm fairly happy with (in no small part thanks to Phil Hobbs' helpful writings on the topic): My current draft uses a sim...

Photodiode bootstrap phase rolloff

Hi all, I am currently working on a range-switched photodiode design for use in...

building electronics beacon for survival | I wonder what I can build some simple electronics light and electronic signal beacons so that searchers can find us - once we are in trouble and scream for help. Obviousl...

building electronics beacon for survival

I am thinking to build electronics beacons for both outdoor and traveling. After...

Wide frequency range, arbitrary waveform DDS | To be able to go down to 0.5 mHz, a phase accumulator of at least 36 bits is required. This will give sub mHz resolution over the entire range. Nice for the low frequenci...

Wide frequency range, arbitrary waveform DDS

To generate frequencies from approximately 0.5 mHz to 12 MHz with a DDS a...

Stepper motor driver issues (Electronics Goldmine stepper motor G14197) | I've double, triple checked the circuit, but the motor just won't work. It seems to me that there needs to be some sort of grounding or V+ applied to one of the windings ...

Stepper motor driver issues (Electronics Goldmine stepper motor G14197)

Hello, I'm having some issues getting this little guy to run: The site says this...

Which is the better state for rechargable Batteries!! | With that in mind, and remembering that it supposedly only takes two hours to fully recharge the Mower Battery, would it be better, after use, to leave the battery 'Flat'...

Which is the better state for rechargable Batteries!!

When I moved house about five years ago, I stupidly left my motor mower in the...

sluggish remote control | Have any of you noticed that your remote control, for a tv or whatever, doesn't work at first, if you haven't used it for a day or two? I keep thinking the batteries have...

sluggish remote control

Have any of you noticed that your remote control, for a tv or whatever, doesn't...

Meyer Sound 833 problem | They will repair it for a set charge of US$592.50 (nice round figure). That's a bitter pill to swallow, but it gets worse. I (and my customer) are here in Australia and I...

Meyer Sound 833 problem

I have a Meyer Sound 833 control unit on my bench. It has a weird fault that...

Scumacher 1042A-PE battery charger has no output. | All other combinations of continuity measure open circuit. In circuit, pins 1 and 2 are soldered together. Any idea what this component is or how to test it?

Scumacher 1042A-PE battery charger has no output.

This Schumacher 1042A-PE battery charger stopped functioning today. It seemed to...

I direct wired Plug and Play LEDs, is this bad? | I replaced the ballast and fluorescent tubes in a bathroom fixture with LED replacements. I'm gradually doing this to all my fluorescent fixtures as they stop working. I ...

I direct wired Plug and Play LEDs, is this bad?

I replaced the ballast and fluorescent tubes in a bathroom fixture with LED...

Dot matrix display | The ID on the segment is: LTP2157AE 927 TAIWAN P Can someone be kind enough to explain the pin-out for me.

Dot matrix display

I have been given a number of 7x5 dot matrix display segments. There are 7 pins...

Soldering a LED Display Matrix | So, I've learned the hard way that it isn't trivial to solder a LED matrix. I've actually extended that lesson to realize any non-planar graph adds difficulty to solderin...

Soldering a LED Display Matrix

So, I've learned the hard way that it isn't trivial to solder a LED matrix. I've...