Hobby Electronics Basics

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(accidentally) shorted a mosfet's drain and source

For a project I noticed my Arduino PWM pump controller (basically just an Arduino, MOSFET, and protection diode) was be...
5 comments posted 4yrs
posted by mrdarrett
5 comments posted 4yrs posted by mrdarrett

Cheap Voltmeter Doesnt Fry Over Voltage

It simply loses linearity. At least up to 38 v where it reads 36 v. Who cares?
0 comments posted 4yrs
posted by bretcahill
0 comments posted 4yrs posted by bretcahill

Jus Run the Voltage Backwars Thru a 8 v Battery

The Fieri light runs on 4 rechargeable cells 2p X 2s. Just wire it so that the voltmeter always gets 8 volts less than t...
1 comments posted 4yrs
posted by bretcahill
1 comments posted 4yrs posted by bretcahill

220k Resistor Does Not Werk On 100 K Voltmeter

Hit just flashes. Furst guess is not enuff nano amps gits thru that yuge resistor. I ben very luky in that California n...
2 comments posted 4yrs
posted by bretcahill
2 comments posted 4yrs posted by bretcahill

Free Energy or Energy Storage

Hi Dears, I watched this video and I'm very curious if this is a really storage or fake. I know that free Energy don't...
0 comments posted 4yrs
posted by tobiasgadelha
0 comments posted 4yrs posted by tobiasgadelha

by 90° in Capacitor ?

Many books told us that current leads voltage by 90° in capacitor. I have designed an experiment to show that it is true...
0 comments posted 4yrs
posted by yuenhonkeung
0 comments posted 4yrs posted by yuenhonkeung

How long to charge 9v nimh battery

I have a 9V 180 ma discharged Nimh battery that I am charging at 25ma. How long will it take to charge? Thanks, Andy
4 comments posted 4yrs
posted by scientist77017
4 comments posted 4yrs posted by scientist77017

MOV Search

Hello, I am an Alarm Technician among other things or stuff. I was thinking about installing a simple MOV on the Transf...
4 comments posted 4yrs
posted by somewhere
4 comments posted 4yrs posted by somewhere

DC motor soft start

I found this neat soft-start circuit on the eevblog forum. Its neatness is that the gate threshold voltage occurs immed...
6 comments posted 4yrs
posted by BobEngelhardt
6 comments posted 4yrs posted by BobEngelhardt

Potentiometer Project

I'm working on a custom project that involves potentiometers and picture adjustments on the monitor they are connected...
4 comments posted 4yrs
posted by Searcher7
4 comments posted 4yrs posted by Searcher7