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A similar device was used by a TV Cable company almost 50yrs ago to solder 0.104" cored coax cable. The cabling jointing was done at eaves level using a battery pack for portability. The 'soldering iron' was a carbon bit connected to one side of a 6V lead-acid accumulator, while a lead from the...

I can vouch for the water softener. I once lived in a very hard water area where it was necessary to descale the kettle once a week because of limescale buildup. I bought one of these devices - Swedish made - after reading good reports of it. Sure enough it worked. But not by softening the water in ...

We have a Panasonic microwave oven that automatically cooks vegetables. You put any quantity of vegetables in a container and switch on. A humidity sensor acts when the temp is up to boiling point by measuring the water vapour given off. The program then calculates from the elapsed time how much lon...

THis link is the next best to an encyclopedia on the subject.

http://www.batteryuniversity.com/parttwo-33.htm

I think you have a faulty 555. When pin 6 reaches 2/3 of V+, an internal bistable flips over and switches on the discharge transistor whose open collector is connected to pin 7. With pins 6 and 7 joined, this should discharge the cap connected to pin 6. When pin 2 triggers, the bistable flips back m...

What are you,...ten?

No, sonny. Lucid and literate - and old enough to be your grandfather!

Glad I'm not though - I would hate to have been responsible for begetting a genetic line of stupidity.

Stupidity is my favorite past time.......

It appears to be your life

So has any one figured out yet the relationship between a capacitor and timing yet, Or is the easy way out still

There is no relationship, per se. Capacity is measured in Farads - time in seconds.

Alzheimer's disease is truly debilitating.

Originally posted by Dean Huster: The best iron I've ever used is a tiny, 15-watt, non-temperature-controlled Antex (made in the UK) iron. Gets hotternell idling, but there isn't hardly any joint short of ground planes that you can't use it on. Seems to me the last one I saw in a catalog was $50 or...

Simple lever.

Hi Miguel, "..If a source generating 0.775 V of audio has 600ohms source impedance, and is terminated or loaded with 600ohms, there will be 0.775V across the load and is called 0dBu, and ALSO 0dBm.." Not so. I am not familiar enough with dBu to know whether an unloaded voltage is implied, ...

Strictly speaking, the dB is the unit of measurement of Power ratios, (the Neper is a similar unit for voltage or current ratios). Modern practice has allowed a suffix, ie 'm' or 'W' to indicate absolute power levels. So 0dBm is a power level of 775mV across 600 ohms. The source impedance is irrevel...

You could use an XOR or XNOR gate. Feed the waveform direct to one input and via an RC network to the other. You get a fixed width pulse out every time the waveform changes polarity. Then integrate the pulses and measure their mean level.

Why, when I read this thread, am I reminded of my pet puppy that yapps all day for no reason at all?

Thanks Steven. It makes sense now.