Hobby Electronics Basics

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Clipping in Simple Emitter Follower Circuit

I have a question. On pages 54-55 of Horowitz and Hill's classic "The Art of Electronics" (first edition), there is a n...
12 comments posted 18yrs
posted by lcorbin
12 comments posted 18yrs posted by lcorbin

Homemade DC to AC inverter questions

Hey, all, I want to build a homemade inverter to convert a DC source into AC. Ultimately I would like to try to build a...
9 comments posted 18yrs
posted by hboothe
9 comments posted 18yrs posted by hboothe

Loosening Sockets

Somehow the common 3-plug socket packages, say of 5-6 sockets, seem irritatingly difficult the put a plug into and take...
8 comments posted 18yrs
posted by wolf_tracks
8 comments posted 18yrs posted by wolf_tracks

12v 4amp rechargable battery

I have been googling on an off but not managed to find anything suitable. I wonder if anyone on here is able to help. I...
3 comments posted 18yrs
posted by paulstewart
3 comments posted 18yrs posted by paulstewart

need reliable 12-13 volts from 24volt wheelchair

I have a 24 volt wheelchair that runs on 2 12 volt batteries in series. I need output not to exceed 13 volts for my cpa...
6 comments posted 18yrs
posted by dpondoc
6 comments posted 18yrs posted by dpondoc

ATMEL FLIP problem

hii i m using ATMEL FLIP for downloading program in At89C51AC3 microcontroller.but after2-3 times i download the progra...
3 comments posted 18yrs
posted by reena.nith
3 comments posted 18yrs posted by reena.nith

Poles an Zeros

Hello, Could someone explain to me Poles and Zeros. What does a Pole do and what does a zero do and how they interact t...
14 comments posted 18yrs
posted by robd
14 comments posted 18yrs posted by robd

Pic Eusart behaviour

I'm working with a PIC2455, trying to get it to send a byte on the EUSART every few milliseconds. What is happening is...
0 comments posted 18yrs
posted by randy.day
0 comments posted 18yrs posted by randy.day

basic elapsed seconds counter

Hi, I need to build a simple timer which simply counts elapsed time in seconds as soon as current is turned on, then tu...
16 comments posted 18yrs
posted by ben.antonio
16 comments posted 18yrs posted by ben.antonio

meaning of impedance(about imaginary part)

When I measured impedance of the RF system, I discoved decreasing imaginary part(minus value). but!! it is minus value(...
1 comments posted 18yrs
posted by udora88
1 comments posted 18yrs posted by udora88

Identify LCD TMGG XXXX

Hello All Looking at the guts of a heating control timer. There is a small (34mm X 86mm) Graphics LCD. The only identif...
2 comments posted 18yrs
posted by dgleeson3
2 comments posted 18yrs posted by dgleeson3

Does an electromagnet lag its input?

If I'm sending a 60 Hz sine wave to an electromagnet (inductor), then won't the current through the coil lag the input...
3 comments posted 18yrs
posted by sylvestersn
3 comments posted 18yrs posted by sylvestersn

Current Shunt

I was considering putting a current shunt in my car to monitor current draw from the battery. I found a 200 A current s...
8 comments posted 18yrs
posted by 1qazse4
8 comments posted 18yrs posted by 1qazse4

Using Op-Amp to drive Amp Gauge with Audio Signal

I currently have a small audio amplifier in a custom case I built. In order for it to look cooler, I decided to find an...
16 comments posted 18yrs
posted by kuhnto
16 comments posted 18yrs posted by kuhnto