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Crystal Controlled Oscillator

I have been tasked with designing a piezoelectric actuator driver at its resonant frequency. This is to replace an arra...
47 comments posted 4yrs
posted by sepflanze
47 comments posted 4yrs posted by sepflanze

Many binary computers will die in 2022 !

How do I know, My kitchen lamp died on 2-1-2022 lol. It's a message from some external universe. Let's see if it becomes...
3 comments posted 4yrs
posted by skybuck2000
3 comments posted 4yrs posted by skybuck2000

ADCMP582 LT Spice Model

ADI doesn't have models yet for their fast comparators. Or any of their own comparators. Here's my first cut at a model...
1 comments posted 4yrs
posted by jlarkin
1 comments posted 4yrs posted by jlarkin

Will this chip work?

Gentlemen, I have a fairly substantial Hacker Helmsman transistor radio made in 1970 and its audio board has failed. Re...
9 comments posted 4yrs
posted by cd
9 comments posted 4yrs posted by cd

Battery Changing issue

I am using these batteries. Discharging from the (BMS managed side) 8 pins connector seems OK, but charging is not work...
17 comments posted 4yrs
posted by edward.ming.lee
17 comments posted 4yrs posted by edward.ming.lee

Happy New (Delta Xi Omicron) Year

Assuming a 2 to 3 weeks time lag in reporting, Delta disappeared in early November and Omicron appeared in early Decemb...
14 comments posted 4yrs
posted by edward.ming.lee
14 comments posted 4yrs posted by edward.ming.lee

Field strength meter -- diode

Nothing could be simpler, an antenna, a coil and a 1N4148 diode but I'm seeing some schematics that have 2 diodes with...
38 comments posted 4yrs
posted by mikerbgr
38 comments posted 4yrs posted by mikerbgr

OT. A Tesla Goes Boom

The car was out of warranty so the owner decided to have some fun.
1 comments posted 4yrs
posted by deanh6929
1 comments posted 4yrs posted by deanh6929

Gain

Gentlemen, When talking about common-emitter configuration BJT stages, is it feasible to get a voltage gain of 400 in o...
42 comments posted 4yrs
posted by cd
42 comments posted 4yrs posted by cd

More chip availability problems

More chip availability problems https://edition.cnn.com/2021/12/30/tech/china-covid-xian-chips-samsung-micron-intl-hnk/i...
0 comments posted 4yrs
posted by pNaOnStPeAlMtje
0 comments posted 4yrs posted by pNaOnStPeAlMtje

transformer coupled logic isolator

Version 4 SHEET 1 880 680 WIRE 480 -32 384 -32 WIRE 608 -32 560 -32 WIRE 608 80 608 -32 WIRE 608 80 544 80 WIRE 656 80...
24 comments posted 4yrs
posted by jlarkin
24 comments posted 4yrs posted by jlarkin

Apex

Does anyone use Apex parts? https://www.mouser.com/c/semiconductors/amplifier-ics/operational-amplifiers-op-amps/?marco...
24 comments posted 4yrs
posted by jlarkin
24 comments posted 4yrs posted by jlarkin

cool war book

The Battle of the River Plate by Dudley Pope.
39 comments posted 4yrs
posted by jlarkin
39 comments posted 4yrs posted by jlarkin

that weird T502 board

We finally got a batch of boards. https://www.dropbox.com/s/rul9yep9ys0snyo/T502A_PCB.jpg?raw=1 None of the board house...
3 comments posted 4yrs
posted by jlarkin
3 comments posted 4yrs posted by jlarkin