1. Home
  2. Electronics Repair
  3. Repair aids idea

Repair aids idea

I would think that this is available but I haven't seen it yet. I use a lot of the AGE Fuses and I wish I had a little fuse that would fit in the standard metal brackets that the AGE Fuses fit into but one that is resetable. Like a little portable circuit breaker that you can pop into the fuse that keeps blowing to help with troubleshooting. Has anyone seen this and if so could you point me to it. The main thing is that it has to fit into the bracket and can be removed easily. Also,

Another thing I would like is a 14 pin or 24 pin or what ever size IC chip that you can program to be any chip you need. Lets say I need a 74LS174. I get the blank 74 chip and pop it in my programmer and make it a 74LS174. Is this already out there?

Thanks Russ

Reply to
russ lavergne
Loading thread data ...

Not possible, I don't think. One crucial parameter of a 74LS174 is its speed. Trying to make it out of a programmable gate array or something would result in a slower chip, not a true substitute. Those logic chips are simple in order to make them fast.

Then there's the problem that different logic chips have different pins for power.

And beyond that, not all ICs are logic chips.

Programming is not how chips are made. Some chips have programmable memory areas that make them very versatile, but they achieve this by already containing *all* the circuitry for *all* their functions; the memory just contains instructions for it. Mostly, chips are made by "wiring" the silicon by means of a series of tiny layers of added material.

Reply to
mc

People recreate entire TTL circuits in FPGAs, someone did this with the original PacMan arcade hardware, Asteroids, and many custom chips used in other classic games have been reproduced in this same way. It's not cost effective to do so for a single TTL chip though.

Reply to
James Sweet

There's numerous projects out there for an electronic fuse. The ones I've seen fit in a project box and use aligator clip leads to connect to the fuse holder.

Reply to
James Sweet

I have a selection of miniature resettable circuit breakers in the most common tripping currents, each fitted with a pair of insulated wires and miniature croc clips. You have to be aware that in general, mcb`s take a lot longer to trip than a fuse does to blow, so it pays to start with a lower value and work up

Ron(UK)

--
Lune Valley Audio
Public address system
Hire, Sales, Repairs
www.lunevalleyaudio.com
Reply to
Ron(UK)

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.