Hobby Electronics Basics

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

Worth reading in Hobby Electronics Basics

dual power supply design

Hello, does anyone know if there's any way to design a simple low power dual power supply? The result should be able to...
8 comments posted 17yrs
posted by panfilero
8 comments posted 17yrs posted by panfilero

Cadmium Sulfide Flame Sensor

Is there a way I could tie this in with a simple circuit to activate a series of relays when it senses flame? I am buil...
10 comments posted 17yrs
posted by tranerm
10 comments posted 17yrs posted by tranerm

IR remote control sensor and emitter

I have a Dish 508 PVR and inside the house the combo IR / UHF remote works fine. Garage, which is detatched, is a bridg...
5 comments posted 17yrs
posted by clutch
5 comments posted 17yrs posted by clutch

Data Calculations

Hi everyone, I am trying to interface USBee=91s Experimenter board, http://www.usbee.com= /usbeeex2.html to a CPLD. The...
0 comments posted 17yrs
posted by conphiloso
0 comments posted 17yrs posted by conphiloso

How to latch a comparator?

I'm working on a failsafe alarm system monitoring 12 separate normally- closed switches. When a switch is momentarily o...
15 comments posted 17yrs
posted by jluers
15 comments posted 17yrs posted by jluers

Need help with level shifter

I have an old PC power supply: +12V 9A +5V 20A -5V 0.5A -12V 0.5A and what I need is: +5V 6A -5V 6A Can someone guide m...
7 comments posted 17yrs
posted by aleksaZR
7 comments posted 17yrs posted by aleksaZR

Mystery Box

Suppose you had a mystery box with 6 buttons on the top and a 4-conductor cable coming out the back. You know that the...
16 comments posted 17yrs
posted by fuque
16 comments posted 17yrs posted by fuque

photo cell or light activated switch

I am curious if it would be possible to use a photo cell or some device that would pick up an led light source and then...
4 comments posted 17yrs
posted by jrmotorsportz
4 comments posted 17yrs posted by jrmotorsportz

Determine speed of DC motor

I have a DC motor with the following specifications: RPM @ 0 Torque: 3500 Stall Torque : 0.01 Nm V_ss : 8V Background i...
14 comments posted 17yrs
posted by hateyou3
14 comments posted 17yrs posted by hateyou3

installing a din rail timer

Hi everyone. First, I have to say I am not very good at this!! I use a din rail switch to control a water pump. this wa...
4 comments posted 17yrs
posted by alves.paulo
4 comments posted 17yrs posted by alves.paulo

Desired Sinewave Generator IC

Hello, there are many ways to build a sinewave generator however todate I have not seen a med-low cost high spec. minim...
27 comments posted 17yrs
posted by newstemp1
27 comments posted 17yrs posted by newstemp1

Series-Parallel DC RC circuit

+---------R1-------*-------* | | R2 C1 | | GND------------------*-------* Hi, I'm am interested in finding the voltage...
32 comments posted 17yrs
posted by kmvgroups
32 comments posted 17yrs posted by kmvgroups

How do I offset an output

I'm playing with a 1302 linear hall effect sensor. It has an output that is about 1/2 supply voltage when not in a magn...
1 comments posted 17yrs
posted by clutch
1 comments posted 17yrs posted by clutch

Legal to sell DC-DC Converter *Kits*?

Hi, Is it legal to sell a kit that includes all of the parts, instructions, and diagrams so someone could build there o...
37 comments posted 17yrs
posted by energymover
37 comments posted 17yrs posted by energymover