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Powerbank vs akumulator motocyklowy

Tak przykladowo Jest sobie akumulator motocyklowy 8Ah i powerbank 20 000 mA. 8*12 = 96 Wh a 20*5,3 = 106 Wh Akumulator kosztuje 160 zl a powerbank 110 zl Powerbank jest 6 razy lzejszy od akumulatota....

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Aim TTi TF930 Frequenzzähler USB zum PC

Hi, da muss mir 'mal jemand, der Erfahrung mit Terminalprogrammen hat auf die Sprünge helfen.- Habe mir ein USB-Kabel vom Frequenzzähler zum PC zugelegt und die Treiber installiert und ein...

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Bloody Mouser!

I can't get any sense out of Mouser's website. You'd have thought finding a diode would be simple enough; the spec ain't that hard to meet: 600V 3A fast recovery diode with through-hole cylindrical...

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Relais de sonnette

J'ai une sonnette filaire de porte d'entrée. Je souhaite l'équiper d'un relais radio pour renvoi vers un "carillon" distant dont il faudra aussi que je m'équipe. Dans le boitier actuel, les deux...

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Recap On Absolute Cheapest Dummy Load

Eventually road 15 km against the wind in highest assist. The motor and refurbished battery were both uniformly warm. There were no hot spots on the battery in the one minute dummy load test so this...

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why are laptop chargers 19 volt when batteries are only half that?

? One possibility is the reduce the current, and therefore the thickness (and so cost) of the connecting wires and plugs and sockets. The voltage can be reduced, and the current correspondingly...

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Bluetooth module master HSP and SPP?

We're going to synthesize some audio and want to transmit over Bluetooth from our embedded device to a Bluetooth headset. Also need to do SPP output. We can provide audio output over I2S or just...

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DT1643s chip in LG monitor

I am repairing an LG monitor, and I could really use some informaiton on a chip named DT1643(s) Any ideas where I can find it? It is a monitor, that does not turn on, power is present. This chip seems...

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Wattmetro uscita 0-20mA o 0-10V

Buon giorno, avete mai visto wattmetri con uscita analogica 0-20mA o 0-10V? Grazie Buona giornata U.C. Il giorno Tue, 13 Sep 2022 12:13:30 +0200 umberto ha scritto: A lancetta no, a display si'...

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Vjetroelektrana + Solarni panel

Imam vjetroelektranu na 24V i Solarni panel na 12V. Kupio bi 2 akumulatora po 12V ( 100Ah + 40Ah) i spojio u seriju da dobijem 24V. ulator od 100Ah bi spojio solarni panel 12V. Na akumulatore bi...

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Frequently Asked Questions All FAQs »

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 »

Which is the better state for rechargable Batteries!! | I believe the Ryobi ones (like many others) have smart charge circuits in each battery, that takes care of balancing, etc. Lithium prefers not to be flattened fully, and ...

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 | If the powermid is flashing, it does mean it detected an IR signal yes, and it certainly can also mean the signal is gibberish from the remote, but I can tell you in over...

sluggish remote control

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

Meyer Sound 833 problem | **Not power supply noise. The power supply is as clean as a whistle. All electros have been replaced with high quality (Panasonic and Nichicon) components.

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. | Since there's a 38 ohm (internal resistor?) connection between the cathode and gate, does that mean the 1.5 V pulse will be automatically limited to about 40mA? 3. How do...

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? | LED tubes internally are wired to the supply at one end, the other end is made as a short circuit - so that the LED tube can be used as a plug and play for a florescent t...

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 | I can see that there are 8 anode pins and 6 cathode pins but that is about as far as I get. R [snip] Connect 3 to 5 volts (through a current-limiting resistor), negative ...

Dot matrix display

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

Soldering a LED Display Matrix | I was trying to build a 5x5 LED matrix (because I only have 25 LEDs right now, and it seemed like a good start). I got two rows in, before I realized I wasn't going to be...

Soldering a LED Display Matrix

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