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TTL Data Book, 2nd edition, 3rd printing

At the town dump I found an almost pristine copy of the Texas Instruments "TTL Data Book for Design Engineers", second...
14 comments posted 3yrs
posted by joegwinn
14 comments posted 3yrs posted by joegwinn

Super sensitive light sensor

I am trying to detect light in a range from complete darkness to a tiny bit of light. Imagine my test set - a shoe box...
8 comments posted 3yrs
posted by sonnic...
8 comments posted 3yrs posted by sonnic...

Diodes, Inc

Diodes is lately a lot more than diodes. A similar case is Onsemi, a spinoff of Motorola that inherited the cheap gumdr...
42 comments posted 3yrs
posted by jlarkin
42 comments posted 3yrs posted by jlarkin

OT: WARNING Landmine on Van Ness, SF (NB 101)

Someone dropped a box there. I made a sharp swing to the right to avoid it, and broke my front end. Might have been bet...
20 comments posted 3yrs
posted by eddy711lee
20 comments posted 3yrs posted by eddy711lee

negative impedance power supply

Has anyone designed a power supply with a negative output impedance? That could be a viable (ie sellable) low-cost alte...
27 comments posted 3yrs
posted by jlarkin
27 comments posted 3yrs posted by jlarkin

Onsemi RF transistors

https://www.onsemi.com/products/discrete-power-modules/rf-transistors#products=fnN0YXR1c352YWx1ZX4yfiF+TGFzdCBTaGlwbWVud...
7 comments posted 3yrs
posted by jjlarkin
7 comments posted 3yrs posted by jjlarkin

Toyota map DVD can't be read.

DVD can't be read, what to do? Toyota Solara with Navigation, which means map DVD. Two or 3 years ago, occasionally I'd...
20 comments posted 3yrs
posted by NONONOmisc07
20 comments posted 3yrs posted by NONONOmisc07

Heat sink lock in retaining spring

Anyone had the misfortune to encounter these? https://www.tme.eu/en/details/thfu-3/heatsinks-equipment/fischer-elektron...
13 comments posted 3yrs
posted by sylvia
13 comments posted 3yrs posted by sylvia

Depletion FET regulator

What's the behavior of a simple regulator like the one in Fig 10, on start-up and shut-down?
17 comments posted 3yrs
posted by user
17 comments posted 3yrs posted by user

Qspice beta dropped

I downloaded and installed the Qspice beta. Despite many claims that it needs Win11 or a 64-bit Win10, it installed und...
3 comments posted 3yrs
posted by pcdhSpamMeSenseless
3 comments posted 3yrs posted by pcdhSpamMeSenseless

OT big bread

https://www.dropbox.com/scl/fi/mld2zws66we9kdg8rk1xr/Big_Bread_Truckee.jpg?rlkey=owmgiv6xvq27s4pco71kk50xr&raw=1
2 comments posted 3yrs
posted by jjlarkin
2 comments posted 3yrs posted by jjlarkin

Help ID'ing a connector

These are used in a Pickman, a Chinese 72V electric utility vehicle. They look very familiar but I've never placed a na...
14 comments posted 3yrs
posted by wb8foz
14 comments posted 3yrs posted by wb8foz

hot spot on moon

When I saw the headline, I was expecting millikelvins or some such. But this is 10 deg C!...
0 comments posted 3yrs
posted by jlarkin
0 comments posted 3yrs posted by jlarkin