Hobby Electronics Basics

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9v DC from 3 phase power line

I have a machine with 1kW, 3 phase motor. I also have a sensor board measuring temperature, humidity and rotation speed...
11 comments posted 22yrs
posted by <Johnietta>
11 comments posted 22yrs posted by <Johnietta>

LED 101 - light when a plug is inserted

Here's what Im hoping to accomplish: I have a +9V lead and a ground going to a plug. I want to light the LED when the p...
8 comments posted 22yrs
posted by anonymous
8 comments posted 22yrs posted by anonymous

Newbie AC/DC electronics question

I am totally lost on understanding most electronics/power requirements, so please forgive me for the following. :-) I h...
4 comments posted 22yrs
posted by jamie.elfattal
4 comments posted 22yrs posted by jamie.elfattal

Sorta silly dc motor question

I've been fooling around with some tiny vibrating pager motors. These motors are .160" dia x .625" long with a .028 dia...
3 comments posted 22yrs
posted by etpm
3 comments posted 22yrs posted by etpm

help reading schematics

Hello, I'm relatively new to the field of electronics, and without a doubt I feel lost when reading a large schematic....
12 comments posted 22yrs
posted by no_spam
12 comments posted 22yrs posted by no_spam

Arcade bench test controller

Would it be possible to make something to use as a test bench arcade controller with a 555, some latches/shift register...
0 comments posted 22yrs
posted by fozztexx
0 comments posted 22yrs posted by fozztexx

pc power suply

Hi, should a PC power suply generate AC ??? Mine does, is it ok? Zibi
3 comments posted 22yrs
posted by P.Zaremba
3 comments posted 22yrs posted by P.Zaremba

primitive circuit - where is my mistake?

I was putting together some bits for a power supply. Ive been away from electronics for too long and am trying to get b...
16 comments posted 22yrs
posted by anonymous
16 comments posted 22yrs posted by anonymous

Simple timer circuit needed

I need a sinple circuit that will be on for 2 secs and off for 4 secs and then repeat indefinetely.I built one with 555...
4 comments posted 22yrs
posted by bobgagno
4 comments posted 22yrs posted by bobgagno

Measuring AC Current

Howdy, I would like to measure current of an AC filament in a vacuum tube. What type of meter would one use if a DMM was...
2 comments posted 22yrs
posted by alanjc
2 comments posted 22yrs posted by alanjc

Viz Voltohmyst V

I recently acquired a Viz Voltohmyst V, model WV-534A. I need the following items: WG-411A High Voltage Probe WG-206 Mu...
2 comments posted 22yrs
posted by nihoa
2 comments posted 22yrs posted by nihoa

op amp vs zener diode

based on my v limited knowledge it seems like these 2 devices perform v similar actions. why would one choose one over t...
2 comments posted 22yrs
posted by <mmm>
2 comments posted 22yrs posted by <mmm>

battery powered?

Okay - I've got a simple project going on here and being a bit of a noob I need some help ;) I've got three x 3mm blue...
20 comments posted 22yrs
posted by james
20 comments posted 22yrs posted by james