General Electronics

Resistor wattage selection

HI, I am bit confused as to determine the wattage for a resistor. They come in 1/4, 1/2, 1, 2 watt etc.. I want to to a...

25 comments posted 20yrs

posted by lera

25 comments posted 20yrs posted by lera

Problems hearing DVD sound...... ???

I have a SONY DVD player that's about 5 years old or so. It workes well however on some of the "newer" DVDs I cannot he...

2 comments posted 20yrs

posted by David_nj_7

2 comments posted 20yrs posted by David_nj_7

555 timer

Hello, Is it possible to gt 10% duty cycle with a 555. I went to this web site: http://ourworld.compuserve.com/homepages...

10 comments posted 20yrs

posted by lera

10 comments posted 20yrs posted by lera

where to get WWV_ / GPS / other clock sync. device?

I need to get a daily time update via a serial connection to a microcontroller in my device. This is for use in a comme...

7 comments posted 20yrs

posted by scottk

7 comments posted 20yrs posted by scottk

Oscillator and audio harmonic filtering...

Greetings. I'm currently working on a project that requires recording multiple audible frequencies to the same audio fi...

13 comments posted 20yrs

posted by shrumj

13 comments posted 20yrs posted by shrumj

A Wireless Energy Transmitter

Hi, After reading about Nikola Tesla, I was wondering if there were any plans to make your own Wireless Energy Transmit...

10 comments posted 20yrs

posted by kidblast03

10 comments posted 20yrs posted by kidblast03

MIL-HDBK-217 Reliability Analysis

Hi Does anyone have a spreadsheet/program I could use to calculate reliability of a circuit i.e. using say MIL-HDBK-217...

1 comments posted 20yrs

posted by home

1 comments posted 20yrs posted by home

Test sockets, Lid actuators, Test boards and adapters

We are specialize in the supply, installation, commissioning and servicing of a range of industrial Test sockets, Lid a...

0 comments posted 20yrs

posted by zhanglingmu

0 comments posted 20yrs posted by zhanglingmu

Broken/Fried Parallel port...

Hello all, I have been working with an interfacing project lately and I think I have "screwed up" my parallel port. Whe...

8 comments posted 20yrs

posted by lmcgill2

8 comments posted 20yrs posted by lmcgill2

Summing non inverting op amp.

Hi, I've a voltage change 3-4 Volts which I need to change into a 0 to 4 Volt signal. I have used an inverting op-amp w...

2 comments posted 20yrs

posted by Daveatfernie

2 comments posted 20yrs posted by Daveatfernie

Sonar components

Hi, I am looking to build a Sonar-system that allows me to measure depth (under water). I found some references to Nati...

1 comments posted 20yrs

posted by lauwe

1 comments posted 20yrs posted by lauwe

AC+DC adder to drive Piezo

Hi, I bought an AC piezo driver (0-20V, bandwidth>100kHz). I also have a DC piezo driver (0-150V). I want to build some...

13 comments posted 20yrs

posted by titinicolas77

13 comments posted 20yrs posted by titinicolas77

How does anyone learn electronics these days?

When I was a youngster, I spent many a happy childhood hour tearing apart old radios and TVs, messing about with bags o...

8 comments posted 20yrs

posted by wtshyman

8 comments posted 20yrs posted by wtshyman

Vacuum cleaners and computers

Is it OK to use a vacuum cleaner right next to a computer? Could the vacuum cleaner generate magnetic fields strong enou...

10 comments posted 20yrs

posted by curious

10 comments posted 20yrs posted by curious

oscillator

Hello, The 555 timer has a maximum frequency of 1MHz. I would like to know if there is another chip that can go up to i...

11 comments posted 20yrs

posted by lera

11 comments posted 20yrs posted by lera