Hobby Electronics Basics

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High Gain Antennas

** Hi all, inspired by a series of posts on the subject of antenna gain - I did a little Googling. My quest was to find...
3 comments posted 15yrs
posted by phil_a
3 comments posted 15yrs posted by phil_a

Antenna question

I'll be grateful if you could explain this: Is antenna gain in dB related to voltage or to power? For example, suppose...
49 comments posted 15yrs
posted by pawihte
49 comments posted 15yrs posted by pawihte

RC's and thermal modeling

So from a previous thread, https://groups.google.com/group/sci.electronics.basics/browse_thread/thread/6563c2244c745710...
7 comments posted 15yrs
posted by gherold
7 comments posted 15yrs posted by gherold

Circuit collections

I have some circuit collections here: http://code.google.com/p/lemontree/downloads/list
0 comments posted 15yrs
posted by bitterlemon40
0 comments posted 15yrs posted by bitterlemon40

DIN Rail Terminal Block - Colours ?

Apologies if this isn't the right place. I've read recently (and can't find now) about DIN Rail terminal blocks and it...
1 comments posted 15yrs
posted by Terminal_Crazy
1 comments posted 15yrs posted by Terminal_Crazy

heating elements

I've been wondering how the heat controls on high power heating element in electric stoves, baseboard heaters and the li...
9 comments posted 15yrs
posted by nospam
9 comments posted 15yrs posted by nospam

Best way to generate 4th power for signal ?

Could some electronics guru please provide some feedback on this issue ? I want to generate the 4th power of a given si...
15 comments posted 15yrs
posted by dakupoto
15 comments posted 15yrs posted by dakupoto

Auto Alarms Designed To Draw 100 Amps

Require auto alarms to include circuit that pulls over 100 amps as long as the alarm is on. If the alarm isn't shut dow...
9 comments posted 15yrs
posted by Bret_E_Cahill
9 comments posted 15yrs posted by Bret_E_Cahill

Some questions regarding band-pass filters

Could some electronics guru please provide some hints to my queries. For a 'four-times' carrier frequency recovery sche...
2 comments posted 15yrs
posted by dakupoto
2 comments posted 15yrs posted by dakupoto

a couple power supply questions

Hello, I gotta couple questions... 1. When you put a volt-meter across something, and you immediately read a voltage, l...
7 comments posted 15yrs
posted by panfilero
7 comments posted 15yrs posted by panfilero

Voltage and heating circuits?

I have a simple heating circuit that takes 16V @ 3.5A. I want to run it on a 12V-48A/hr deep-cycle battery. Now, I can...
16 comments posted 15yrs
posted by foo
16 comments posted 15yrs posted by foo

Wires fell off

This is a link to a picture that I hope will show my problem. It has been over a month since I worked on this. It is th...
9 comments posted 15yrs
posted by chocolatemint77581
9 comments posted 15yrs posted by chocolatemint77581

Furnace bump timer

I put this circuit together over twelve years ago. I have it installed on my furnace/air condition control. I have a mo...
34 comments posted 15yrs
posted by amdx
34 comments posted 15yrs posted by amdx