Hobby Electronics Basics

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Warm-up Time for 3 Phase Power Analyzers

Hi, I am trying to understand the technical specifications of three phase power analyzers and I see a "warm-up time" me...
10 comments posted 15yrs
posted by anand.paralkar
10 comments posted 15yrs posted by anand.paralkar

How to convert this 6502 to PIC?

Hi, I have written a small 6502 program to buzz the piezo with morse code message. I wish to make it onto a small PCB w...
4 comments posted 15yrs
posted by allenbsf6502
4 comments posted 15yrs posted by allenbsf6502

Understanding step down transformers

I could use some help in understanding why some transformers heat up even when nothing is plugged into them. Ex. Heavy...
10 comments posted 15yrs
posted by chocolatemint77581
10 comments posted 15yrs posted by chocolatemint77581

2n4416 jfet equivalent?

Anyone recommend an equivalent to the 2n4416 jfet? Trying to build this FM radio. http://www.somerset.net/arm/fm_only_on...
3 comments posted 15yrs
posted by mrdarrett
3 comments posted 15yrs posted by mrdarrett

The Real State Of Affairs

I had read somewhere recently that the real state of electronics technology today is actually about fifteen years ahead...
3 comments posted 15yrs
posted by ryon
3 comments posted 15yrs posted by ryon

48v to +5 and +/- 12

I am looking for either an 'off the shelf' or schematic (or point me to where I may find one) for a psu. 48v input, out...
8 comments posted 15yrs
posted by all.junkmail
8 comments posted 15yrs posted by all.junkmail

calibrate mV to V

I have acquired a tiny digital panel meter, but cannot calibrate it. Although the manual says to change various jumpers...
4 comments posted 15yrs
posted by kvsteve
4 comments posted 15yrs posted by kvsteve

Hidden Tesla Technological System

Has anyone ever heard of Tesla having designed two entirely different systems of technology within one basic hardware d...
94 comments posted 15yrs
posted by thhissux
94 comments posted 15yrs posted by thhissux

PIC12F629 beginner needs help

Hi, I ordered some 12f629 & 12f675 from microchip direct and wanted to play with them. I have a simple circuit that hav...
26 comments posted 15yrs
posted by allenbsf6502
26 comments posted 15yrs posted by allenbsf6502

Speed control of Central Heating Circulator

Hi guys, title says it all really. I want to control the speed of a central heating pump somewhere slower than normal....
14 comments posted 15yrs
posted by Terminal_Crazy
14 comments posted 15yrs posted by Terminal_Crazy

Microwave Detector Mount

Hello all, I am looking for a waveguide RF-Detector Mount, X-Band (8.2-12.4 GHz), UG39/U. Does anyone know where to find...
0 comments posted 15yrs
posted by alexandre.mantovani.nardes
0 comments posted 15yrs posted by alexandre.mantovani.nardes

FFTs On Excel

Has anyone heard about Fourier transforms on Excel? Google didn't have any quick obvious hits. Excel would be a cheap e...
26 comments posted 15yrs
posted by Bret_E_Cahill
26 comments posted 15yrs posted by Bret_E_Cahill

HD44780 orcad library

Hi, Anybody has the orcad library for LCD screens. I have the HD44780 and would like to add it to my schematic. It is no...
0 comments posted 15yrs
posted by lerameur
0 comments posted 15yrs posted by lerameur

Use circuit for blinking LED for use with 4 LEDS

I have a flashlight that I would like to change what it does. I want the blinking LED circuit(one bulb) to be used to r...
17 comments posted 15yrs
posted by chocolatemint77581
17 comments posted 15yrs posted by chocolatemint77581

The Most Suitable Waveform for Cancellation

Some folks like to cancel noise but using a microphone on a headphone not only is less than 70% efficient, it cancels a...
2 comments posted 15yrs
posted by Bret_E_Cahill
2 comments posted 15yrs posted by Bret_E_Cahill