Hobby Electronics Basics

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PCB Software

Hi there all, I am looking for a entry level PCB package that is under 200$, the big ones like orcad proteus and eagle...
6 comments posted 20yrs
posted by me
6 comments posted 20yrs posted by me

Store old Lithium ion batteries in refrigerator?

Is this a good idea? How low a temperature can they take? I have a few spare used cell phone Li-ion batteries that I ma...
2 comments posted 20yrs
posted by wrongaddress
2 comments posted 20yrs posted by wrongaddress

microwave

How many amperes of current does a typical microwave use? Thanks.
4 comments posted 20yrs
posted by mike7411
4 comments posted 20yrs posted by mike7411

Identifying parts

Hi I have several part here, I think they are resistors, but the color used are confusing. I put a jpg here: http://www...
10 comments posted 20yrs
posted by lera
10 comments posted 20yrs posted by lera

Convert 10v AC to 9v DC

I have a friend who needs to convert 10-11v AC to 9v DC. This is for a small foot pedal on a guitar. Can anyone diagram...
3 comments posted 20yrs
posted by stevesemple
3 comments posted 20yrs posted by stevesemple

AND gate output

If suppose the inputs of amplitude X and 2X are applied to the 2-input AND gate then what would be the amplitude of outp...
18 comments posted 20yrs
posted by raghujindia
18 comments posted 20yrs posted by raghujindia

Changing direction of an AC motor using relays

The project I'm working on is a boat lift. Right now you have to hold a knob on a drum switch to make the lift go up or...
1 comments posted 20yrs
posted by Tamor02
1 comments posted 20yrs posted by Tamor02

atx power supply turn on

I am trying to make a PS-ATX-300S computer power supply come on to power a car radio. I only need 2 12V leads and a -12V...
6 comments posted 20yrs
posted by lovablevolker
6 comments posted 20yrs posted by lovablevolker

Efficiency of Low rpm Hub Motors

What is the efficiency of these electric bicycle hub motors? http://www.largoscooters.com/stealthcomparison.html Bret Ca...
0 comments posted 20yrs
posted by BretCahill
0 comments posted 20yrs posted by BretCahill

SMT soldering

I have zero experience with SMT soldering. I have a Weller WTCPS soldering station. Is there a tip that is good for SMT...
14 comments posted 20yrs
posted by notbob
14 comments posted 20yrs posted by notbob

Do they make resistors in values over 10M?

Just out of curiosity. Occasionally I run into a schematic on the web (which means it could be an excellent circuit or...
14 comments posted 20yrs
posted by blahbleh666
14 comments posted 20yrs posted by blahbleh666

Pic page size

Afternoon group... I am going mad here... I have a 16LF84A PIC here that appears to freak whenever it does a call to a...
2 comments posted 20yrs
posted by feebo
2 comments posted 20yrs posted by feebo