Hobby Electronics Basics

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AC Powered LED Circuits

I am interested in making my own AC powered LED lighting. I have replaced all my incandescents with the Home Depot styl...
8 comments posted 22yrs
posted by jrojas
8 comments posted 22yrs posted by jrojas

Wind Vane

I found an article in a 1998 "Electronics Now" mag that shows how to build an electronic wind vane using a rotary encod...
1 comments posted 22yrs
posted by rkovach
1 comments posted 22yrs posted by rkovach

Solenoid Actuated Poppet Valves

Could a solenoid be constructed to mimic the proper valve position vs time curve of a engine cam shaft? Maybe a circuit...
18 comments posted 22yrs
posted by bretcahill
18 comments posted 22yrs posted by bretcahill

12 volt battery connections

Hey! I'm 14 and I'm trying to power a small neon light that requires a 12 volts of electricity (usually for a car)with...
4 comments posted 22yrs
posted by packerfan6000
4 comments posted 22yrs posted by packerfan6000

Collector current

H.W help: The early voltage is 60V in a common-emitter configuration for a npn bipolar transistor. With Vbe = 0.65V and...
13 comments posted 22yrs
posted by jl
13 comments posted 22yrs posted by jl

Multisim 2001

I want to upgrade my component database of Multisim 2001 Personal version, but the update asks for the Multisim Service...
0 comments posted 22yrs
posted by raletelier
0 comments posted 22yrs posted by raletelier

dvd screen from laptop screen

Hi. Just wondering, is it possible to make incar dvd screen from a used pentium svga laptopscreen. Best regards Viper
3 comments posted 22yrs
posted by viper
3 comments posted 22yrs posted by viper

Need heater strip circuit

Hi, I posted recently a problem with a controller circuit kit that I constructed using a 7555 timer IC and a BUZ71A pow...
8 comments posted 22yrs
posted by lansma
8 comments posted 22yrs posted by lansma

Clues on controller circuit problems

Hi, I'm not sure whether anyone can help with this problem but I though I would post on the of chance because I haven't...
2 comments posted 22yrs
posted by lansma
2 comments posted 22yrs posted by lansma

Solar Panel availability

Just so you know...I was at Wal-Mart the other day, and noticed several different sized solar panels used to charge car...
0 comments posted 22yrs
posted by ksleep
0 comments posted 22yrs posted by ksleep

Still confused with basics

Since an electrical outlet might be used for any size appliance it must contain a full/max current and then the applian...
17 comments posted 22yrs
posted by jwillsi1
17 comments posted 22yrs posted by jwillsi1

CNC

Hi. I am looking for a basic single spindle hobby type 3 axis CNC that will allow me to rout up to 3.2mm FR4, Balsa and...
3 comments posted 22yrs
posted by Reeferjon
3 comments posted 22yrs posted by Reeferjon

Help with power resistor markings & value?

Rectangular ceramic power resistor in a Braun handheld blender (120 vac) is open. Markings on resistor are: 206-8 R R47...
9 comments posted 22yrs
posted by me
9 comments posted 22yrs posted by me

UPS using 230kWh/year on its own

X-No-Archive: Yes I've got an Invensys/Best 1000VA UPS that is drawing 26.7W constantly with the battery fully charged...
3 comments posted 22yrs
posted by dude17
3 comments posted 22yrs posted by dude17

help: DIY antenna for portable CD player (?)

I've got one of these new portable cd players with a built-in FM tuner, and used to keep it on my desk at work to liste...
6 comments posted 22yrs
posted by iotarhorho
6 comments posted 22yrs posted by iotarhorho