OT: for superglue and hot melt glue users

Started by John Doe in sci.electronics.design5 days ago 9 replies

Superglue... Keep the unused portion in the refrigerator and it will last indefinitely. Also, use Kleenex "soothing lotion" or Puffs Plus...

Superglue... Keep the unused portion in the refrigerator and it will last indefinitely. Also, use Kleenex "soothing lotion" or Puffs Plus (facial tissues with an additive) for cleaning the tip and you will never have crud build up and blocking the nozzle. The tissue thing I have been using over the last many months, maybe a year. Very cool since the nozzle stays perfectly clean, so far. ...


Some classics from the archive

Started by bitrex in sci.electronics.design5 days ago 4 replies

Re-organizing my library, here are suggestions for some old-time classics, from before my age, from the halcyon days of the great kings of...

Re-organizing my library, here are suggestions for some old-time classics, from before my age, from the halcyon days of the great kings of old, from the days when America was great or w/e. Also they're all very cheap. "Electron Tube Circuits", 1950


Abusing brick on the rope

Started by George Herold in sci.electronics.design5 days ago 50 replies

Hi all, I just got done fixing a piece of apparatus that was returned to us. The thing was trashed, (all sorts of blown components) and I've been...

Hi all, I just got done fixing a piece of apparatus that was returned to us. The thing was trashed, (all sorts of blown components) and I've been trying to figure out what happened. Perhaps what I found weirdest is a power monitor LED. This sits across the +/-15 V rails, with a 12V zener and 5 k ohm resistor in series. (the zener stops it from turning on if one of the rails fails.) It j...


MyTurn To Be OT: Liberals

Started by Anonymous in sci.electronics.design5 days ago 35 replies

From what I recall, there is a law in the US against inciting insurrection. Well we have Mz Squeaky Clean here Hillary Clinton (I say Mz because...

From what I recall, there is a law in the US against inciting insurrection. Well we have Mz Squeaky Clean here Hillary Clinton (I say Mz because she was not married to Bill Blythe, it was a business partnership) with the following; "Clinton said her husband, former President Bill Clinton, told her that "Democrats have to be tougher."" ""You cannot be civil with a political party


Need to construct the logical reverse of a 7448 - perhaps using a GAL

Started by John Robertson in sci.electronics.design6 days ago 44 replies

I am looking for a way to take the TTL level outputs (treating them as inputs) of a 7448 and convert them back to the original BCD TTL input...

I am looking for a way to take the TTL level outputs (treating them as inputs) of a 7448 and convert them back to the original BCD TTL input levels (but as outputs) and I figured a simple socketed GAL would do the trick for the least cost. However I don't have the skill set to build the GAL logic table for this. Any suggestions? And no, I can't simply remove the 7448 from the circuit. ...


worldwide internet threat map

Started by TTman in sci.electronics.design6 days ago 180 replies

For anyone that is interested:- https://threatmap.checkpoint.com/ThreatPortal/livemap.html --- This email has been checked for viruses by...

For anyone that is interested:- https://threatmap.checkpoint.com/ThreatPortal/livemap.html --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus


PID loop frequency

Started by Fitzgerald in sci.electronics.design1 week ago 32 replies

I'm working on a digital PID motion controller. The target/goal is to move at (very) constant velocity. Position feedback is from a linear...

I'm working on a digital PID motion controller. The target/goal is to move at (very) constant velocity. Position feedback is from a linear encoder with quadrature output. The input to the controller is a linear ramp (i.e. constant velocity) and the PID changes the motor output to minimize the error. The system works, but I'm looking to improve its performance at low velocities. At low...


World's Worst Soldering!

Started by Cursitor Doom in sci.electronics.design1 week ago 48 replies

Hi all, I just fixed up this classic Tek 466 scope I've been meaning to get around to sorting out for the last few years. As you can see, my...

Hi all, I just fixed up this classic Tek 466 scope I've been meaning to get around to sorting out for the last few years. As you can see, my soldering is atrocious. I've been soldering this type of circuitry for 50 years and never got any better at it in all that time. When it comes to soldering and part-placement, I suck donkey dick! Check it out and enjoy at my expense: https://ww...


Book categories: AoE III

Started by Jeroen Belleman in sci.electronics.design1 week ago 4 replies

I just came across the reference to AoE on this ISBN number search site . The book is classified as 'Adult Non-Fiction'. Do you think it...

I just came across the reference to AoE on this ISBN number search site . The book is classified as 'Adult Non-Fiction'. Do you think it might corrupt my 16 year old daughter? Jeroen Belleman


Liquid cooling baseline testing

Started by bitrex in sci.electronics.design1 week ago 32 replies

I have a piece of thin aluminum plate (one side of a type of extruded aluminum enclosure really, but the edges are not thermally well-coupled...

I have a piece of thin aluminum plate (one side of a type of extruded aluminum enclosure really, but the edges are not thermally well-coupled to the other sides of the box) about 25 cm long by 5 cm wide by 1 mm thick, and a 40 mm by 40 mm copper water block thermal epoxied to it. The lone cooling block looks rather like this: Connected to a copper proces


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