Hobby Electronics Basics

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MOV Standoff voltage

What would be the better MOV for L-N for a 90-140VAC input smps.The supply includes a 25mH CM choke and 0.1uf X2 cap,60...
0 comments posted 18yrs
posted by spamme
0 comments posted 18yrs posted by spamme

8051 does not oscillate

Hi 8051 experts there I have made a circuit for remote switching of or on a motor using 89C2051 and the program has che...
13 comments posted 18yrs
posted by clueless
13 comments posted 18yrs posted by clueless

transformers in parallel

Let's say I've got a transformer, 110VAC primary, 24V secondary, 1A. Let's say I've got 4 of them actually, same type,...
23 comments posted 18yrs
posted by mrdarrett
23 comments posted 18yrs posted by mrdarrett

Smokin' POTentiometer

Repost, I believe the message got lost in the SPAM... Hello everybody. About a month ago I made a post titled "How do I...
5 comments posted 18yrs
posted by kmvgroups
5 comments posted 18yrs posted by kmvgroups

E-N voltage below 2V

Hi Friends, I need help. I have done earthing for one of my dish. Earth resistance is 1.5 ohm. Requirement :- The volta...
0 comments posted 18yrs
posted by gurukushe
0 comments posted 18yrs posted by gurukushe

Why so much spam in this group?

Why is there so much spam in this group? Can't Google do something about it? -Bill
12 comments posted 18yrs
posted by wrongaddress
12 comments posted 18yrs posted by wrongaddress

Flyback load transient test

What is a typical period and pulse width of a load transient test on 60kHz flyback converter. I've been reading datashe...
3 comments posted 18yrs
posted by spamme
3 comments posted 18yrs posted by spamme

harmonics in power

i was unable to understand what these harmonics are? plz help me regarding this
6 comments posted 18yrs
posted by dileepkumarladi
6 comments posted 18yrs posted by dileepkumarladi

What to use to hold Coil Windings in Place?

Hi All Can anyone suggest whats best to use to hold the windings of an Air Coil with about 7 turns, about 12mm long - I...
3 comments posted 18yrs
posted by shelton.dcruz
3 comments posted 18yrs posted by shelton.dcruz

Skipping "zero" with a counter?

Hi guys: I'm working on an application where I'd like to have a two-bit counter that needs to continuously count 1, 2,...
5 comments posted 18yrs
posted by eromlignod
5 comments posted 18yrs posted by eromlignod

Advice oscilloscope for hobbyist

Hello! I wish to buy my first oscilloscope (for hobbyist). I have search some information in the Internet, but I still...
19 comments posted 18yrs
posted by news_js
19 comments posted 18yrs posted by news_js

Sealed lead acid batteries

Hi What is the fastest rate of discharge advisable for a sla battery? Is the terminal voltage a good indication of the c...
4 comments posted 18yrs
posted by ted.pca
4 comments posted 18yrs posted by ted.pca

Basic Electricity Question

I went over a book which discussed safety in electric systems. To my understanding, I think if there is no complete pat...
14 comments posted 18yrs
posted by jl
14 comments posted 18yrs posted by jl

reading Power Dissipation graphs

I'm reviewing the datasheet for the LM1875. Page 4, upper-left, has a Power Dissipation vs. Power Output graph for a 4-...
2 comments posted 18yrs
posted by mrdarrett
2 comments posted 18yrs posted by mrdarrett

flip-flop question

I'm designing a circuit and I need something to switch between two inputs. I don't have very much experience, but I thi...
12 comments posted 18yrs
posted by razorboy
12 comments posted 18yrs posted by razorboy