Hobby Electronics Basics

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series LC questions

Hi Group, When the jwL is equal to -1/(jwc) at Frequency Fres for the series LC, the circuit is a shunt and become a "s...
1 comments posted 21yrs
posted by pdrunen
1 comments posted 21yrs posted by pdrunen

boot on power-up

Hi, I'm trying to accomplish what I thought was an extremely simple task, of putting a capacitor across the atx power s...
1 comments posted 21yrs
posted by invalid
1 comments posted 21yrs posted by invalid

Power supply filtering and bleeder resistor calcs

I am wanting to build a power supply and need a bit o' help. I have an "Electronics for the hobbiest" type book that go...
2 comments posted 21yrs
posted by seware
2 comments posted 21yrs posted by seware

How hard would this be to make?

I got a bit of a weird request for circuit people out there. I want to make a display out of LEDs. I'm not sure of the...
5 comments posted 21yrs
posted by JCSforindependence
5 comments posted 21yrs posted by JCSforindependence

series L/C ?

Hi Group, I have a series L/C circuit, which will be excited at the resonate frequency with a 1Vpp Sine Wave. The react...
5 comments posted 21yrs
posted by pdrunen
5 comments posted 21yrs posted by pdrunen

FS: Low ESR Electrolytic and Film capacitors

1200uF, 35V Nichicon PL for 12 cents These are the old stock of Nichicon's PM extremely low impedance capacitors. I hav...
0 comments posted 21yrs
posted by rlim701
0 comments posted 21yrs posted by rlim701

8051 reset problem

Hello, I have a circuit for an 8051 type microprocessor which executes a 1 minute program and then shuts down completel...
3 comments posted 21yrs
posted by sean_public
3 comments posted 21yrs posted by sean_public

Computer power supply

Can I use a OLD computers power supply box as a power supply unit for my circuits? I don't have a motherboard or anythi...
9 comments posted 21yrs
posted by plasma
9 comments posted 21yrs posted by plasma

Power Noise Filter question

Hi, do anyone knows how does the Power Noisy Filter work? And where can find such of information for my research? Thank...
4 comments posted 21yrs
posted by vytmax
4 comments posted 21yrs posted by vytmax

Testing a PCB for shorts/open

One of my customers tests there PCB's with a flying probe tester. When they find a common problem area on there boards,...
0 comments posted 21yrs
posted by fluxin
0 comments posted 21yrs posted by fluxin

Video lectures

Hi, I'm looking for anyplace that sells learning ac/dc electronics using video lectures. I have math videos and they ar...
3 comments posted 21yrs
posted by hdjim69
3 comments posted 21yrs posted by hdjim69

mini 6 pin DIN has 4 wire

I bought 7" color TFT monitor on ebay and intend to use it at home. The monitor only has mini DIN plug. The wire it cam...
0 comments posted 21yrs
posted by barbecuesauce99
0 comments posted 21yrs posted by barbecuesauce99

PCB Layout Software Sucking

Hi, anyone here using a good board layout software, I have looked around and they all seem rubish, overly complicated i...
12 comments posted 21yrs
posted by richard_harris_2
12 comments posted 21yrs posted by richard_harris_2

Capacitors & Capacitance

Hi, Just been reading about capacitors and understand the property of capacitance. The problem is I don't see how this...
33 comments posted 21yrs
posted by richard_harris_2
33 comments posted 21yrs posted by richard_harris_2

Speakerless Headphones?

I remember seeing an writeup in popular science about 5 or 6 years ago about some headphones that don't use speakers. T...
9 comments posted 21yrs
posted by jaedend
9 comments posted 21yrs posted by jaedend