Hobby Electronics Basics

  1. Home
  2. Hobby Electronics Basics
9387 Threads Posts
to

Worth reading in Hobby Electronics Basics

Capacitor with 105 degree celsius ?

Capacitor with a range of 105 Celsius & life 8000 hours? I am curious to know who will design a circuit put under such...
9 comments posted 21yrs
posted by mowhoong
9 comments posted 21yrs posted by mowhoong

car battery and windshield wiper motor

For an art piece, I would like to be able to anticipate about how long a standard car battery would drive a car windshi...
7 comments posted 21yrs
posted by palito
7 comments posted 21yrs posted by palito

RLC

Hello All Say I have a resistor R, inductor L and capacitor C connected together in series The easiest way to find the...
29 comments posted 21yrs
posted by cheanglong
29 comments posted 21yrs posted by cheanglong

Help with a keypad connection to GPIO pins

I am hoping someone in this group can explain why, the below, is ok to do. I'm a little cautious in implementing it bec...
2 comments posted 21yrs
posted by dave.shattuck
2 comments posted 21yrs posted by dave.shattuck

Ultrasonic

Hello, I am requesting help to construct an ultrasonic device that emits sound at about 25Khz. Unlike most ultrasonic d...
7 comments posted 21yrs
posted by no
7 comments posted 21yrs posted by no

Need explantion of part of schematic

The schematic concerned is at the end of the microchip document on microchip serial programming http://ww1.microchip.co...
6 comments posted 21yrs
posted by lessie
6 comments posted 21yrs posted by lessie

I need help (KVA)

Hi, I would like to know the Kva for the following appliances. 4 freezers at 5 amps each 3 chiller units at 3 amps each...
2 comments posted 21yrs
posted by george_holland222
2 comments posted 21yrs posted by george_holland222

sensing circuit w/ out comparator

I have created a simple light sensing circuit using 2 voltage dividers and a comparator. Basically, high resistance and...
7 comments posted 21yrs
posted by SteveKlett
7 comments posted 21yrs posted by SteveKlett

Help with circuit diagram please

Hi I have a slightly unusual project I wonder if someone can help with. I need to customise a guitar to include 20 4.8v...
3 comments posted 21yrs
posted by acefrehley
3 comments posted 21yrs posted by acefrehley

About 3-phase AC

Hi there, In 3-phase AC wiring, if phase to neutral voltage is 110V, then why is phase to phase voltage 220? I know pha...
17 comments posted 21yrs
posted by nospam4u_jack
17 comments posted 21yrs posted by nospam4u_jack

Capture IC Statement?

In Orcad Capture Lite Edition, I can set the voltage of a capacitor by clicking on it and editing its properties, but i...
0 comments posted 21yrs
posted by slave
0 comments posted 21yrs posted by slave

Laptop keyboard - how does it work?

Underlying the key mechanisms is a double-sided film with concentric circuit pads (for each key) on either side of the...
7 comments posted 21yrs
posted by me
7 comments posted 21yrs posted by me

Stabling frequency of RF oscillator

I have a smal RF UHF oscillator with antenna, for use like sound transmitter. It is colpits osc. How to stable it's fre...
2 comments posted 21yrs
posted by slav4o_1
2 comments posted 21yrs posted by slav4o_1

comparator help (super newbie)

I'm trying to understand the basic LM239 comparator. I have read several sites about them, looked at samples, read data...
4 comments posted 21yrs
posted by SteveKlett
4 comments posted 21yrs posted by SteveKlett