Hobby Electronics Basics

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Running power supply with just fans

Would it be safe to run a 500W ATX computer power supply with the only load being 4 12V fans (and a few LED lights) or w...
7 comments posted 20yrs
posted by parker.trevor
7 comments posted 20yrs posted by parker.trevor

Bidirectional signal

There is a bidirectional IO Port Pin in the 8051 Microcontroller Core which needs to be connected to a bidirectional si...
3 comments posted 20yrs
posted by pavithra.eswaran
3 comments posted 20yrs posted by pavithra.eswaran

555 Calculator

Looking for a calc that will solve for R1, R2, C in astable 50% DC with entering desired freq (1KHZ)and DC(50%). All th...
52 comments posted 20yrs
posted by jasonrnorth
52 comments posted 20yrs posted by jasonrnorth

Image Sensor Basics

Is there anybody that can advise me a good course, tutorial, book or pdf to get me started in the field of image sensor...
2 comments posted 20yrs
posted by bvandenbon
2 comments posted 20yrs posted by bvandenbon

How to explain the waking screen rustle?

Hi, I would like to know the reason why one can hear a little rustle coming from a sleeping pc (or tv) screen when it is...
24 comments posted 20yrs
posted by xbz80ANTISPAM
24 comments posted 20yrs posted by xbz80ANTISPAM

40v offset to ground?

I'm using a small, switching power supply for a project. (It's a Kaga sx15u-05s). When hooking it up, I found terminals...
7 comments posted 20yrs
posted by scott
7 comments posted 20yrs posted by scott

does this circuit use conventional current?

In the reader response section in Nuts & Volts last month, a reader asked if it was possible to detect when someone was...
11 comments posted 20yrs
posted by nospam
11 comments posted 20yrs posted by nospam

PIC example : using a diode as temperature sensor

Hi, I would like to share this idea with you : http://www.micro-examples.com/public/microex-navig/doc/098-temperature-s...
6 comments posted 20yrs
posted by noreply
6 comments posted 20yrs posted by noreply

Simple transistor

Hi All, There is a PN diode, P connects 3.3V, N connects to ground. We knew that Vf is 0.7V. How to explain that the mea...
18 comments posted 20yrs
posted by bokiteam
18 comments posted 20yrs posted by bokiteam

9-volt battery be stepped down to 1 - 2 milliamps

I don't know a ton about electronics so bare with me. I recently read an article which involves making a device. I know...
11 comments posted 20yrs
posted by MrStuartG
11 comments posted 20yrs posted by MrStuartG

Shift Register 74LS166

Greetings, I am currently having a problem on getting a shift register to work. I need to pass serial data out into a s...
13 comments posted 20yrs
posted by sillycar
13 comments posted 20yrs posted by sillycar

Absolute Beginner--Making Sense Of Capacitors

Hey, everybody! In the interest of actually getting my understanding of electronics right, I'm trying to forget all the...
5 comments posted 20yrs
posted by peterg
5 comments posted 20yrs posted by peterg

[Newbie] Supplying power to a project

I one of those folks who knows enough to be dangerous. I have a good grasp of a lot of basics, but I'm missing a fundam...
1 comments posted 20yrs
posted by kpmartin
1 comments posted 20yrs posted by kpmartin