T&L Publications

Amazingly versatile transformer, that is. Wind it for whatever you like!
Only concern about an unloaded secondary with the primary powered, is contact between the secondary wires! Lotta amps!

Thanks, but still cannot find in the manual any hints at "Cleaning the cartridge nozzles".
Have used hot water after removing the cartridge from the machine, or even isopropyl alcohol. But, the old cartridges are stubbornly clogged.

Sorry to hear of the inkjet troubles! My ancient HP650C Plotter is still chugging along, as I do quite a bit of roll printing. Cartridges for this 1990-era machine are the problem. Many, many suppliers sell old reman cartridges, or out of date originals, so finding ones that work is a constant searc...

From the wiki page that Janitor Tzap referenced:

Electrical
Signal 5 V DC
Max. voltage
5.00+0.25
−0.60 V[a]
5.00+0.25
−0.55 V (USB 3.0)
20.00 V (PD)
Max. current
0.5 A (USB 2.0)
0.9 A (USB 3.0)
5 A (BC 1.2)
3 A (type-C)
Up to 5 A (PD)

Good info! Thanks! Next comes connector replacement!

Well, not entirely dead, but battery will not charge. Dell Inspiron 8500 laptop, many years old, but reliable until now. Works on AC, but battery does not charge, all of a sudden. Tried an old, but still OK battery and same result- doesn't charge. Also, on power up, get the message, "AC Power Adapte...

Maybe the ebay seller could answer that. 2-3 volts each is typical of LEDs, but series/parallel wiring will dictate what power source is needed. Could always power it up starting low, slowly increase voltage until they get a little too warm? Flat panel ceiling lamp, eh? Nice project! I'd like one of...

Nope- not in N & V that I've seen. What I haven't seen demonstrated is one more polarity reversal beyond levitation- and that causes the attraction. It's clever looking as to how Leonerd arranged that in his Master Magnet, just would like to see it work before building it. Anyone want to explain the...

Some years ago, there was an article called, "Master Magnet", by Leonard Crow. It was instructions on how to build a magnet, powered by 120 VAC, that could pick up Non-Ferrous metals like copper and aluminum. http://www.rexresearch.com/mrmagnet/mrmagnet.htm Has anybody tried building such a magnet? ...

Have a large quantity of the tabbing ribbon used to build your own photovoltaic modules. Several different sizes of solder tinned copper ribbon- rolls are many, many meters in length! Let me know if interested, and I'll provide sizes and Ulbrich's part numbers. All still factory packaged. Willing to...

Hi Len,
What kind of range is reasonable for these transceivers, using simple dipole antennas? What frequency are they on?
Thanks!
John

Backup created, but she still lives.
Magic occurs!

Seems like ideal application for a 555 timer. The sensor, instead of triggering the relay, would start the timer, and any new burst of light would keep resetting the timer. Then, if enough time passes without light, the timer would trigger the relay.

They make a nice drying rack for t-shirts.

And I thought I saw some weird things in 60+ years in electronics! The pc was still dead after doing the Janitor Tzap procedure. Later in the day, still dead. Twice tried. Dead. At this point, since it's dead, no point trying to fire it up again, right? It is dead! This morning, I went to pull out t...