Hobby Electronics Basics

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novice question

hi all, i'm building a small electronics project which was bought in kit form... bear with me i'm a beginner ;) everyth...
9 comments posted 19yrs
posted by a
9 comments posted 19yrs posted by a

Quick start cards

Does anyone here know anything about the origin and evolution of quick- start cards for consumer electronics products,...
0 comments posted 19yrs
posted by johnb505
0 comments posted 19yrs posted by johnb505

Clock Project

Would like to build a digital clock with a long-duration mechanical escapement ("artistic" part). I found Bill Bowen's...
7 comments posted 19yrs
posted by igorshump
7 comments posted 19yrs posted by igorshump

Used DVM for SPL (Sound Level) Meter

Hi all, I have a nice DVM that has recording and PC interface and I would like to use it for a sound pressure level met...
11 comments posted 19yrs
posted by CTurn45
11 comments posted 19yrs posted by CTurn45

Motion Sensor with LED's

Hi, Im having some difficulty trying to make a circuit. I want to create a desk lamp which only switches on/off when yo...
9 comments posted 19yrs
posted by sizz1
9 comments posted 19yrs posted by sizz1

voltage divider or series current resistor

I am just a beginner so forgive me if this question is stupid. On a simple circuit, like 2 LEDs with a 12v supply, whic...
6 comments posted 19yrs
posted by guitchess
6 comments posted 19yrs posted by guitchess

Photo-etch light source?

MG Chemicals sells pre-sensitized copper-clad PCB blanks for use with their exposure and etch kit. Pretty straightforwa...
27 comments posted 19yrs
posted by reply
27 comments posted 19yrs posted by reply

Power supply part design: AC DC convert problem

I have a PSU parrt design problem. It should receive 24V AC input to get 12V DC. It start with a snub circuit, which is...
2 comments posted 19yrs
posted by DAXU
2 comments posted 19yrs posted by DAXU

how to repair an electric heater?

Hello I have a small AC portable electric heater that quit working last year. I'd like to repair it myself, and hopeful...
13 comments posted 19yrs
posted by jjensen14
13 comments posted 19yrs posted by jjensen14

LED question

In checking out some LED's. Rated at 1.8 volts and max current 20 ma. Using 9 volt regulated power supply and variable...
13 comments posted 19yrs
posted by hiview
13 comments posted 19yrs posted by hiview

PIC USART troubles

Hello all, Im in a bit of a desperate situation. I am trying to get my PIC 16f876 to talk to a Ericsson T28. The T28 ha...
10 comments posted 19yrs
posted by wayne_tams
10 comments posted 19yrs posted by wayne_tams

Old Lafayette valve radio problem

I have a very old valve radio from a company called Lafayette. It has 6 valves which are 6v6 gt 6x5 gt 6sq7 gt 6sk7 gt...
8 comments posted 19yrs
posted by lafayetteradio
8 comments posted 19yrs posted by lafayetteradio

VGA 15 pin/9 pin Multisync=standard?

I'm a little confused about the VGA and Multisync computer monitor standard. I know that 15 pins are most common, the p...
2 comments posted 19yrs
posted by sixteen_thirtytwo
2 comments posted 19yrs posted by sixteen_thirtytwo