Hobby Electronics Basics

Schmitt Triggers

I have been looking at schmitt trigger circuits and didn't realise how many variations there are. Anyway I found this o...

32 comments posted 6yrs

posted by rob

32 comments posted 6yrs posted by rob

AoE 3rd Ed heavy discount on Amazon UK

A UK heads up, https://www.amazon.co.uk/Art-Electronics-Paul-Horowitz/dp/0521809266 I had the first edition at college,...

9 comments posted 6yrs

posted by email

9 comments posted 6yrs posted by email

Measuring Accuracy: 1.0 grade

An Amazon meter is described as having "Measuring Accuracy: 1.0 grade". I found that there is a standard that defines t...

3 comments posted 6yrs

posted by BobEngelhardt

3 comments posted 6yrs posted by BobEngelhardt

Speaking of 555s...

Recently I added an air cylinder to a manual lathe that opens the half nut when threading by moving the proper lever. F...

10 comments posted 6yrs

posted by etpm

10 comments posted 6yrs posted by etpm

Engineer's Mini Notebook Series is on-line

https://archive.org/search.php?query=Forrest%20Mims%20engineer%27s%20mini-notebook

0 comments posted 6yrs

posted by default

0 comments posted 6yrs posted by default

Basic circuit help please

I have put together a circuit from here: https://circuitdigest.com/electronic-circuits/light-fence-circuit-diagram-with...

64 comments posted 6yrs

posted by rob

64 comments posted 6yrs posted by rob

OT History of Carbon

https://www.tf.uni-kiel.de/matwis/amat/iss/kap_4/advanced/t4_2_1.html#_3 or https://tinyurl.com/tubg3yk Deals with the...

0 comments posted 6yrs

posted by default

0 comments posted 6yrs posted by default

Remote repeater - bit more power to led output

Hi, I'd be grateful for a little advice. I use a tvLINKplus device for repeating the magic eye remote signals which are...

3 comments posted 6yrs

posted by bob

3 comments posted 6yrs posted by bob

Wattage of rough service incandecent bulbs ??

I have build a series load test light. eg. you plug a load in and it runs i n series through a lamp, in case there is a...

48 comments posted 6yrs

posted by stevwolf58

48 comments posted 6yrs posted by stevwolf58

Pilot light

I have taken some pilot lights out of a broken stove. These lamps indicated whether the element was on or the element w...

9 comments posted 6yrs

posted by stevwolf58

9 comments posted 6yrs posted by stevwolf58

The Triumph of Dedicated Solutions Over Double Duty; How Much Is Electronics Indirectly Influencing Mechanical Design?

There are other factors at work here. In the late 19th Century and much of the 20th Century they didn't always have the...

4 comments posted 6yrs

posted by bretcahill

4 comments posted 6yrs posted by bretcahill

Cost of the Cheapest LoFi AM Transmitter ~ 20 - 30m Range

Everything on Ebay seems to be more than $3.

13 comments posted 6yrs

posted by bretcahill

13 comments posted 6yrs posted by bretcahill

?This equipment was never designed to be recycled, which is why we have such problems?

Design the electronics to have a rip cord or self destruct button that automatically separates and sorts the items....

0 comments posted 6yrs

posted by bretcahill

0 comments posted 6yrs posted by bretcahill

Failure mode of LEDs in overcurrent situation

I'm curious about what happens to an LED when it is exposed to a moderate overcurrent situation. This question came abo...

3 comments posted 6yrs

posted by and4y2

3 comments posted 6yrs posted by and4y2

Crimping technique?

Is a crimping tool supposed to work on these things? https://www.dropbox.com/s/hnflor5ratjg06s/CrimpingMaleHeader.jpg?r...

3 comments posted 6yrs

posted by me

3 comments posted 6yrs posted by me