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two switcher circuits

https://www.dropbox.com/s/keynlhs9ktzivyh/LTM8078_dual_neg_1.asc?dl=0 https://www.dropbox.com/s/htzvrbnd8qx3ooi/LTM8078_...
31 comments posted 6yrs
posted by jlarkin
31 comments posted 6yrs posted by jlarkin

mSATA PCIe connector

I'm thinking of using a standard mSATA / PCIe card-edge connector in a miniature pocket-sized project. Its small 30mm w...
28 comments posted 6yrs
posted by winfieldhill
28 comments posted 6yrs posted by winfieldhill

LT Spice alternate solver

I have a sim that hangs up unless I use the alternate solver. Is there a directive I can put in my circuit to force tha...
0 comments posted 6yrs
posted by jlarkin
0 comments posted 6yrs posted by jlarkin

500A power source

In my search for a 8 to 10V, 500A source, needed for 2 seconds, I've been looking at LiFePO4, and LTO (Lithium Titanate...
41 comments posted 6yrs
posted by winfieldhill
41 comments posted 6yrs posted by winfieldhill

varicaps?

They seem to be getting obsolete. Maybe I can cheat and use a regular pn diode. -- John Larkin Highland Technology, Inc...
112 comments posted 6yrs
posted by jlarkin
112 comments posted 6yrs posted by jlarkin

Re: Query: Specialized old clock

>The 31 day movement is a Korean invention. Thanks for the info. I blundered across an Arduino version of the calendar...
4 comments posted 6yrs
posted by jeffl
4 comments posted 6yrs posted by jeffl

3D printable med supplies

NIH page: Like most "crowd-sourced" projects most of these designs are feel-good bullshit that nobody will ever produce...
18 comments posted 6yrs
posted by user
18 comments posted 6yrs posted by user

OT: News of This Disease is So Depressing

Mostly because so much of what is happening was preventable and what is goi ng to happen can still be prevented, but wo...
8 comments posted 6yrs
posted by gnuarm.deletethisbit
8 comments posted 6yrs posted by gnuarm.deletethisbit

OT RIP Philip Anderson

Nice thoughts and links here. https://www.math.columbia.edu/~woit/wordpress/?p=11698#comments Mostly for the physics typ...
1 comments posted 6yrs
posted by ggherold
1 comments posted 6yrs posted by ggherold

Radon sensor?

No nothing about this area. Are there sensors available to do a diy tester? Interface with a PIC or PI and roll your own...
6 comments posted 6yrs
posted by mikerbgr
6 comments posted 6yrs posted by mikerbgr

Approach to Finding the Root Cause of Failures

Another topic that I hope can elicit engineering discussion: What makes up a good skill set for finding the root cause...
108 comments posted 6yrs
posted by blocher
108 comments posted 6yrs posted by blocher

pretty good frequency counter

Anybody have one of these? https://www.digikey.com/products/en/test-and-measurement/equipment-specialty/618?k=&pkeyword...
27 comments posted 6yrs
posted by jlarkin
27 comments posted 6yrs posted by jlarkin

CDC Can't Even Manage a Web Site

The CDC provides numbers that no one else does, infection counts adjusted t o the estimated date of infection. I though...
1 comments posted 6yrs
posted by gnuarm.deletethisbit
1 comments posted 6yrs posted by gnuarm.deletethisbit