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Hello,In the circuit below I have Vc>Vb. I need some how to make Vb larger then Vc. I there a method using R1 R2 and R3 which could swith the Vbc junction state? Given the circuit how can I make the

After trying various battery powered ones (using 2xAA cells) I found one on eBay that uses a single 18650 rechargeable cell that is fine enough for my needs. I found that 2xAA rechargeable cells were

An informative review can be found at https://www.tomshardware.com/reviews/pinecil-v2 Looks very impressive.

OK please consider I'm 73 and dislike any computer smaller then an HP netbook, and that includes my never to be damned enough Moto e6 'smart phone.' The specs mention a CPU, so does this iron have an

For small work, my rig is a Pinecil running off a Dewalt battery & usb-c adapter which has a belt clip. https://pine64.com/product/pinecil-smart-mini-portable-soldering-iron/ -- Mike

Oh critical warning, do not use these in an explosive atmosphere or around flammables like gasoline or alcohol! It's easy to forget there is a tiny fire inside. I almost set a car on fire with mine.

I've tried many battery powered soldering irons, all failed in less then a year. I now use a Weller butane soldering iron, it is about 40 years old, works great, came with a wide selection of

Looking for good recommendations on a battery powered soldering iron. Precision work is a requirement, doesn't need to work for hours on end, 1/2 hour every now and then is enough. Any

The problem with that is right-angle plugs. Instead of the wire trailing down the wall on its way to wherever it's going, you end up with the wire exiting the plug in an upward direction, which can

Strictly speaking this isn't electronics but I've noticed many people who are into electronics also play guitar (and conversely, many people who play guitar are into electronics.) I've "played"

The advantage of an electrostatic voltmeter is there is no load on the power source after the capacitor charges, for high voltage power supplies for things like nite scopes (starlight scopes), these

Maybe the Porsche had more air flow across the ignition coil and kept it cooler. All I know is I went through 4 coils in VW bugs and my wife put 50K on the transporter with no coil problems. Fuel pump

What amazes me is ignition systems like the 1998 ZX2 with one "plug pack' for each of the 2 pairs of spark plugs, the high voltage winding wasn't grounded and one end fed each spark plug. So one

I remember spinning plates, not any bear. Could never see the point of them. 1960 was quite the year, but I'd rather not go back there... Lots of stupid stuff out there on the 'net. YT doesn't

1 - I agree that suggesting connecting mains through a resistive divider to an MCU input is nearly criminal. But I also remember, as a young lad, connecting the line voltage through a diode bridge to

I was going through a cluttered computer subdirectory and found the original program SDRplay used as the basis for their SDRuno software. Studio1 was developed by one of the design team for the

Too bad this isn't 1960 and the Ed Sullivan show was on Sunday nights because the presenter is a much better comedian then engineer. His escapades would go over quite well with dancing bears and guys

https://www.youtube.com/watch?v=jqlqCIZ3Kfg

I'll extract the coil to spark plug wiring for the 1998 Ford ZX2 so you can see what I meant. File shall be named "ZX2 Ignition.doc", a word document with embedded graphic.

1 - the Freon also provided insulation for the voltage divider resistors. When the Freon eventually leaked away, you could see the corona on the internal connections. 2 - the polarity of the spark