Hobby Electronics Basics

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LM723 Based Power Supply

Hi Everybody, I need to build my own power supply. I need a proven circuit for 0 to 30V DC variable power supply with m...
73 comments posted 16yrs
posted by anand.paralkar
73 comments posted 16yrs posted by anand.paralkar

LTSpice is easier now

http://www.linear.com/designtools/software/ltspice.jsp A couple things you can do to make life easier when using the ex...
0 comments posted 16yrs
posted by Winston
0 comments posted 16yrs posted by Winston

value of the resistence

Small signal voltage gain by one small resistance connected to emitter through a large by passed resistance and junctio...
6 comments posted 16yrs
posted by supahimahanta
6 comments posted 16yrs posted by supahimahanta

model parameters in LT Spice

I've just started using the free version of LT Spice and haven't had a problem doing simulations as long as the compone...
19 comments posted 16yrs
posted by nospam
19 comments posted 16yrs posted by nospam

Input Impedance OpAmp Circuit

Hello, I'm trying to figure out what the input impedance to this op-amp circuit is. I have 2 ways I've been thinking ab...
25 comments posted 16yrs
posted by panfilero
25 comments posted 16yrs posted by panfilero

Fast Recovery Diode

Hi Everybody, Could someone please explain the use of a Fast Recovery Diode? I am particularly interested in: 1. How is...
3 comments posted 16yrs
posted by anand.paralkar
3 comments posted 16yrs posted by anand.paralkar

headphone audio output voltage range

Does the audio output voltage swing negative, or does it stay positive? Put another way, does the output waveform look...
5 comments posted 16yrs
posted by mrdarrett
5 comments posted 16yrs posted by mrdarrett

Pspice of a RC circuit in parallel

Hello, I'd like to monitor the Capacitance and the Resistance as a function of DC bias when a sinusoidal voltage (that...
1 comments posted 16yrs
posted by alexandre.mantovani.nardes
1 comments posted 16yrs posted by alexandre.mantovani.nardes

trying to build a simple Class D circuit

After thinking about the overheating of output transistors in a Class AB scheme, I decided to try instead to build a Cl...
20 comments posted 16yrs
posted by mrdarrett
20 comments posted 16yrs posted by mrdarrett

Multiple Sensor Array

Hi guys, I'm building a temperature monitoring system. I've got about 8 Thermistors reading into a networked IO device....
9 comments posted 16yrs
posted by Terminal_Crazy
9 comments posted 16yrs posted by Terminal_Crazy

building a small amplifier for the first time

I finally settled on this one: http://www.techlib.com/electronics/audioamps.html#computer Questions: 1. Would a 2N2222...
9 comments posted 16yrs
posted by mrdarrett
9 comments posted 16yrs posted by mrdarrett

How to power a single LED from a 12v supply?

Over this coming winter, I'm planning a complete refit of my small boat's electrical system. One of the things I would...
47 comments posted 16yrs
posted by news
47 comments posted 16yrs posted by news