Hobby Electronics Basics

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Spice Model Problems?

I'm honing my Spice modeling skills and need some suggestions of devices whose manufacturer-provided Spice model doesn'...
17 comments posted 14yrs
posted by To-Email-Use-The-Envelope-Icon
17 comments posted 14yrs posted by To-Email-Use-The-Envelope-Icon

Which diode is faster ?

Hi, http://www.digikey.com/product-detail/en/MBR40250TG/MBR40250TGOS-ND/1477185 OR http://www.digikey.com/product-detail...
1 comments posted 14yrs
posted by jsscshaw88
1 comments posted 14yrs posted by jsscshaw88

OT: Best Source for memory?

I want to bump up the memory in my Lenovo ThinkPad X61s from 2GB to 4GB. Who are the most reliable sources from which t...
11 comments posted 14yrs
posted by To-Email-Use-The-Envelope-Icon
11 comments posted 14yrs posted by To-Email-Use-The-Envelope-Icon

opamp inputs

can anyone tell me how an opamp powered off of 9V, can be used to take meas= urements of really high voltages, like 100...
20 comments posted 14yrs
posted by panfilero
20 comments posted 14yrs posted by panfilero

PCB light box - hf ballast / tube wattage

When buying an HF ballast and fluorescent tube does the ballast wattage have to match the tube wattage? Is it allowable...
11 comments posted 14yrs
posted by example
11 comments posted 14yrs posted by example

Watt meter

Hi, I am consider to use one of the following watt meter. My question is which one can have more capability to handle l...
17 comments posted 14yrs
posted by jsscshaw88
17 comments posted 14yrs posted by jsscshaw88

RC Time Constant

How do you figure out the RC time constant of a battery in series with a resistor that is in series with the parallel c...
5 comments posted 14yrs
posted by panfilero
5 comments posted 14yrs posted by panfilero

Teaching electronics

Will be teaching an "Intro to Engineering" class to a group of 18 gifted hi= gh school seniors this fall. Total of abou...
15 comments posted 14yrs
posted by ivanvegvary
15 comments posted 14yrs posted by ivanvegvary

OT: Reverse Osmosis

Replacing R/O unit under kitchen sink... Double sink, disposer, dishwasher drain, R/O filter, it's a nightmare of pipes...
11 comments posted 14yrs
posted by To-Email-Use-The-Envelope-Icon
11 comments posted 14yrs posted by To-Email-Use-The-Envelope-Icon

Trigger -> RF -> Bluetooth

Hello! I am trying to build drum triggers using Piezo sensors. I would like to do it wirelessly, would it be possible t...
3 comments posted 14yrs
posted by 3423
3 comments posted 14yrs posted by 3423

Heat sink area for 10 watt LED?

What heat sink area would I need for this 10 watt white LED? The sink area on the LED is 7/8 inch by 9/16 or a little l...
19 comments posted 14yrs
posted by bperryb
19 comments posted 14yrs posted by bperryb

VHS-to-DVD

"Spring" Cleaning... Discovered ~30 VHS Family Tapes. Recommendations for best conversion to DVD? I presently no longer...
20 comments posted 14yrs
posted by To-Email-Use-The-Envelope-Icon
20 comments posted 14yrs posted by To-Email-Use-The-Envelope-Icon

Lead Acid Battery Charging

Hi, Battery: http://www.digikey.com/product-search/en?lang=en&site=us&KeyWords=522-1032-nd&x=12&y=27 Charger:...
31 comments posted 14yrs
posted by jsscshaw88
31 comments posted 14yrs posted by jsscshaw88

TV Back-light Spark Gap?

I have a cheapy 19" Philips TV hanging on my office wall. It's taken to making a popping noise, suspiciously sounding l...
41 comments posted 14yrs
posted by To-Email-Use-The-Envelope-Icon
41 comments posted 14yrs posted by To-Email-Use-The-Envelope-Icon

WebCam Needed

need a USB WebCam using on Windows XP or later need highest NATIVE resolution. (at least 5M Pixels) need auto focus nee...
2 comments posted 14yrs
posted by nospam
2 comments posted 14yrs posted by nospam