Hobby Electronics Basics

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Dumb question of the week: Mis-matching & matching

Hi All, I have been trying to figure out this basic concept for quite some time now, but without much success: When pur...
22 comments posted 19yrs
posted by billcalley
22 comments posted 19yrs posted by billcalley

ribbon cable repair

Need to repair a Mylar type ribbon cable that's split. It's not the wire conductor type but the flat stuff with what ap...
6 comments posted 19yrs
posted by djdieterle
6 comments posted 19yrs posted by djdieterle

OT Ping Michael Black

Here's an OT thread just for you Michael. On at least three occaisions, you have followed up one of my posts with smart...
1 comments posted 19yrs
posted by spam-not
1 comments posted 19yrs posted by spam-not

Beginner help building 5V power supply

Hi, I'm new to the group (and fairly new to electronics). I created a 5V DC power supply to power a PIC microcontroller...
12 comments posted 19yrs
posted by N
12 comments posted 19yrs posted by N

controlling

hi, all fri i am very interested in control method. so i want to know what books are good for control.
2 comments posted 19yrs
posted by polian22
2 comments posted 19yrs posted by polian22

Switch inputs

Hi, Since most picaxe´s have a very limited amount of analoge inputs, I was wondering if its possible to make a switch...
9 comments posted 19yrs
posted by nospam
9 comments posted 19yrs posted by nospam

loud class AB amplifier

LM386 when operated from 6 volts can give sufficiently loud sound. Would it be possible to design class AB amplifier wh...
5 comments posted 19yrs
posted by z.libretto
5 comments posted 19yrs posted by z.libretto

Electronic products order station

Hello: i'm a a electron tool great seller.collect, shoese and the mp3. we sell the guitar.shoese and the bag,you can wh...
1 comments posted 19yrs
posted by laoda250
1 comments posted 19yrs posted by laoda250

Optoisolator in a stepper controller circuit

I will be driving a unipolar stepper motor with an old 68HC11. I'm thinking about using this http://www.aaroncake.net/c...
3 comments posted 19yrs
posted by richard.rowell
3 comments posted 19yrs posted by richard.rowell

Safe supply voltage for cell phone

I have a Motorola V550 cell phone. When I use it as a modem, it drains its battery quickly. So, I decided to make an au...
4 comments posted 19yrs
posted by ignoramus15609
4 comments posted 19yrs posted by ignoramus15609

Weird diff amp behavior?

hey, i'm using a LM324 opamp configured as a diff amp. the inputs come from opamp followers, so there shouldn't be any...
3 comments posted 19yrs
posted by sam.y.andrew
3 comments posted 19yrs posted by sam.y.andrew

Wrong PSU - Please help?

I want to learn a little about PSUs transfomers can anyone point me to some links which could prove useful. The reason...
7 comments posted 19yrs
posted by delakota555
7 comments posted 19yrs posted by delakota555

telephone monitoring circuitry

Hi This seems to be an active newsgroup and so I was wondering if there is someone who could help me with a techie prob...
3 comments posted 19yrs
posted by s0451664
3 comments posted 19yrs posted by s0451664