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Cakepans

@cakepans.bsky.social

130 followers 440 following 200 posts

SATCOM tech, Photographer, Video gamer.

I love to take things apart and sometimes I even put them back together.

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Cakepans

@cakepans.bsky.social

I found one was well a month ago . Naples, Italy.

November 9, 2025 at 7:32 PM

Cakepans

@cakepans.bsky.social

September 4, 2025 at 9:30 AM

Cakepans

@cakepans.bsky.social

Nearly finished with a pixel 6a battery delete mod.

September 4, 2025 at 9:30 AM

Cakepans

@cakepans.bsky.social

Actual long exposure from mars

August 22, 2025 at 9:23 AM

Cakepans

@cakepans.bsky.social

The best thing about this time of year in Italy is my front yard is full of these cuties.

let me know what you think.

#macrophotography #jumpingspider

Curious looking jumping spider perched on a leaf surrounded by green

Curious looking jumping spider perched the tip of a leaf looking down at the world.

April 19, 2025 at 9:16 PM

Cakepans

@cakepans.bsky.social

love the moss on the ground in this one.

An ant at eye level, traveling over a moss carpeted soil.
The ants carapace shines in the morning like reflecting a blurry image of the photographer.

March 23, 2025 at 8:06 AM

Cakepans

@cakepans.bsky.social

I have missed photography.

Macro photo of a bee collecting pollen.
Pollen covers the legs of the bee and the tips of Stamen, (the pollen producing part of the flower, I think that's what it is at least.)

March 23, 2025 at 8:01 AM

Cakepans

@cakepans.bsky.social

December 30, 2024 at 10:17 PM

Cakepans

@cakepans.bsky.social

Vape I took apart today, it has a flexible PCB that has some functional lights on it to indicate capacity of fluid (a guess at it at least) and, power levels. Pretty cool. I think 2 microcontrollers were used for this which seems like a waste, I wonder if anyone has ever tried to repurpose them.

December 30, 2024 at 10:15 PM

Cakepans

@cakepans.bsky.social

More table of contents

The preface: The purpose of this handbook is to make available the semiconductor circuit engineer, a large selection of well-designed and reliable contemporary circuitry as well as comprehensive design philosophy text as an aid in design of circuits for electronic equipment and systems The emphasis is on "building block" circuitry. The pertinent characteristics of each selected circuit are fully described and the general design philosophy precedes each group of selected circuits is a guide from which other designs can be formulated. The members of the selected semi-conductor conductor circuits committee (A list of names follows ill some interesting ones) Alden h. Young department of the Navy bureau of ships, Rudolph a. Bradbury Air Force Cambridge research center, George Abraham naval resource laboratory, John f. Hyland department of the Navy bureau of ships, and Keats a. Pullen Jr. Ballistic research laboratory department of the army. (The preface continues) I wish to express my deepest appreciation to the co-authors for their contributions and cooperation in the successful completion of this work. Thanks also to sorab k. ghandhi of general electric and James b. Angell of philco for their contributions on standardization and circuit elevation, + and to Eleanor McCabe and Donald e. Pope of transistor applications for their proofreading and other assistance and to argyle Bridget for his efforts in the video section. A special thank you to Mr. Norman Downs of miter corporation who was also instrumental in making this book possible. This book is dedicated to my wife Mrs. Evelyn Schwartz whose help and encouragement made this book possible. Much of the material appearing here was originally written and compiled by the department of the Navy under contract NObsr-75231.

This is the page of the contents, part 3 low frequency amplifiers
Section 1 design philosophy
Transistor characteristics
Circuit considerations
Thermal considerations
Distortion
Negative feedback
Basic amplifiers
Bibliography
Section 2 selected circuits
Low level auto amplifier
Transformer coupled output stage
Input circuit for capacitive transducer
Input circuit for inductive transducer
Low level transistor preamplifier
High input impedance preamplifier
Why temperature range preamplifier
High input impedance wide temperature range amplifier
Diode coupled AC preamp
Twin-tee rejection amplifier
Complimentary symmetry amplifier
Self-Balancing push-pull class A output stage
75 watt audio amplifier
High gain serbo amplifier
High efficiency servo output stage

Part 4 high frequency amplifiers
Design philosophy
Introduction
Equivalent circuits
Power gain instability-- the rest of this section is cut off and continues on the next page

Continued from previous page
Unilateralization and neutralization
High frequency noise
Automatic gain control
Tuned amplifier interstages
Video amplifiers
References and bibliography

Selected circuits
One stage neutralized 455 KC if amplifier
Two-Stage 455 kC if strip
Stable wideband amplifier
Rf stage for 3-band receiver
60 mcif amplifier usage silicone treteodes
Narrowband selective amplifiers
Emitter tuned IF amplifier
30 MC if amplifier
Wideband transistor feedback amplifier
Video amplifier
Wide band video amplifier
Wide Bank high frequency iaf amplifier (bank is not a type it says bank not band)

Part 5 oscillators
Design philosophy
Introduction
Frequency stability
Types of oscillators
Summary
References
Bibliography

Selected circuits
High stability self-exided oscillator
Wide range constant amplitude oscillator
Vhf oscillator
100 KC reference oscillator
450 KC Crystal oscillator
(Continued on next page)

(Continued from previous page)

1mc Crystal standard oscillator
9mc Crystal standard oscillator
108 MC Crystal oscillator
20 KC audio Crystal oscillator
Audio frequency oscillator
Phase shift oscillator
Twin tee oscillator
Voltage controlled wien bridge oscillator
Series tuned emitter, tune-based oscillator

Part 6 switching circuits
Design philosophy
Transistor characteristics
Circuit design methods
Basic flip-flop design procedure
Symmetrical circuits
Triggering methods
Blocking oscillator circuit design procedure
Direct couple transistor methods
Negative resistance circuit methods
Other circuit methods
References
Bibliography

Selected circuits
Saturated RC coupled flip flop
Non-Saturated RC coupled flip flop
Direct coupled transistor flip-flop
Current switching flip flop
Base gated direct coupled flip-flop
Saturated clamped flip-flop
Saturated clamped high-speed flip flop
High-Speed graded bass transistor flip flop
Medium speed silicon flip flop
Emitter follower cross-coupled saturated flip-flop
Negative resistance diode flip flop
(Continues on next page)

December 10, 2024 at 11:58 AM

Cakepans

@cakepans.bsky.social

One of several books that I don't understand.

"Selected semiconductor circuits handbook"

#circuits #electronics #semiconductors #books

Front cover. Shows a circuit diagram with the words "selected pairs of 2n355, 2n356, 2n337, 2n338 or 2n542."
At the bottom left and "John Wiley & sons, inc., publishers" on the bottom right.

Top section of the cover shows credits for the book. "editor Seymour Schwartz
Co-authors Robert e. McMahon, Arthur w. Carlson, carl r. Hurting, William f. Santeomann junior, H. C. LIN, peter G. Sulzer, Richard r. Mac millan and Robert Smith.

Below the paper protective cover is a sleek black cover with a gold embossed symbol of a PNP transistor. It's rather elegant and beautifully simple.

In the front cover Someone has signed, Allan F. Potter. In neat cursive handwriting.

The first page of the table of contents shows there are sections in this book including. Intro, direct-coupled amplifiers, their design philosophy several sub sections about them and then selected circuits and their diagrams.

December 10, 2024 at 11:31 AM

Cakepans

@cakepans.bsky.social

What a yummy looking I mean beautiful moth

November 26, 2024 at 10:29 AM

Cakepans

@cakepans.bsky.social

I love this one it makes me feel so happy looking at it. Lots of wonderful shades form the sun setting and the clouds covering the sea.

#italy #naples #landscape

The Naples coastline in Italy shows grass in the foreground then behind that is blue green water hitting the shores with a white foam, you can see many small white structures lining the beach. Further back in the background you see a large green and dark sandy colored cliff with some small structures sprinkled across it's flat top, more inland on the cliff is a large cluster of white and redtan structures. The weather is slightly cloudy and has a light blue sky .

November 24, 2024 at 2:42 PM

Cakepans

@cakepans.bsky.social

Beautiful close up of what I assume to be wolf spider. Love the texture of it's furry bristly coating.

Close up macro photo of a brown and black spider as it waits on some dry grass and sticks. Its legs are all in different positions due to the uneven arrangement of its perch.

November 24, 2024 at 10:24 AM

Cakepans

@cakepans.bsky.social

9v Lithium battery. Nonrechargeable

A lithium battery in the form of a 9v like in a smoke detector. The body is constructed of black plastic and in the body are cylindrical slots for 3 barrel shaped batteries that are lined up parallel to each other.

November 22, 2024 at 4:37 PM

Cakepans

@cakepans.bsky.social

Damn Dobby was a Sith. Wow.

#Corridordigital

Dobby from Harry Potter wearing a black robe and hood

Dobby with his red light saber given to him by his master.

November 17, 2024 at 9:20 PM

Cakepans

@cakepans.bsky.social

#Reverseengineering this solar flood light.
Want to fix or at least extract the charging circuit to keep using the battery and solar panel

Led array on a pcb with a charging and other circuitry on the lower half of the board

Notebook with a crudely drawn integrated circuit and some labeling. Multimeter and led floodlight also pictured laying on a desk my keyboard.

November 7, 2024 at 9:15 AM

Cakepans

@cakepans.bsky.social

Here's the light idk if I can fix it but I'll at least try to extract the solar charging circuit. Never tried anything like that but it's probably possible

November 4, 2024 at 5:21 AM

Cakepans

@cakepans.bsky.social

Solar floodlight stopped working so I salvaged this. I believe it's a LiFePo4 it's the first commercial product I have seen with this chemistry

November 4, 2024 at 5:18 AM

Cakepans

@cakepans.bsky.social

Just got to play a game with Mint Blitz. Opposite teams but hell yeah!

#halo #haloinfinite

November 3, 2024 at 9:56 AM

Cakepans

@cakepans.bsky.social

This cat is a killing machine. They definitely can have devastating effects on animal population. I have seen this cat eat an iguana longer than har body.

#Caturday
#photography