Hobby Electronics Basics

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ESD discharge current

In conformance with the IEC 61000-4-2 ESD test method, if the unit under test, such as a typical battery operated porta...
0 comments posted 21yrs
posted by ahkit1021
0 comments posted 21yrs posted by ahkit1021

Electronic calculator program (MiscEl)

A new version of MiscEl has just been released: http://hjem.get2net.dk/hkj/miscel.html Main improvement is two "constan...
0 comments posted 21yrs
posted by xx.hkj.xx
0 comments posted 21yrs posted by xx.hkj.xx

Switch off unneeded periperals - how?

Hi Folks, I'm looking for a solution to switch off not used peripheral components in a portable uP system. My first tho...
1 comments posted 21yrs
posted by lovelyhard(
1 comments posted 21yrs posted by lovelyhard(

Volt/Ampere for Trace Elliott GP 11 MK V preamp?

Hello, could you help me, please? I'd need simply to know which tension and current does the Trace Elliott GP 11 MK V p...
0 comments posted 21yrs
posted by sergio
0 comments posted 21yrs posted by sergio

lenght cable tester?

I heard about a tester which measure the lenght of the cables, but I don't know how it work. Does it measure only the r...
1 comments posted 21yrs
posted by impeller
1 comments posted 21yrs posted by impeller

Amp Meter

Hi guys I have a circuit with a 24 volt DC power supply 2 amps that feeds about 20 small relays and I have an amp meter...
13 comments posted 21yrs
posted by rickj
13 comments posted 21yrs posted by rickj

MICROPHONE PREAMP HELP

Hi, I need to build a preamplifier for a mic to connect it to a PC soundcard. The mic I am using is a proffesional mic...
1 comments posted 21yrs
posted by karthik.ravikanti
1 comments posted 21yrs posted by karthik.ravikanti

What type of resistor do I need?

I'm upgrading the tail lamps on my vehicle and one set of bulbs are not being used in the new configuration. However, t...
6 comments posted 21yrs
posted by johnandhan
6 comments posted 21yrs posted by johnandhan

CMOS IC help!

Looking for help to find a replacement for the 4063b IC - I have a year 11 pupil who has built a circuit which requires...
9 comments posted 21yrs
posted by dm8660
9 comments posted 21yrs posted by dm8660

PWM for a high amp motor?

I have a 1500 watt 12VDC motor on the anchor windlass that I want to give all the power it needs. I also want to slow i...
1 comments posted 21yrs
posted by gashmore
1 comments posted 21yrs posted by gashmore

Getting into Digital circuits

I would like to get back into electronics to build some projects. Back many moons ago in HS I did some stuff with elect...
9 comments posted 21yrs
posted by 1qazse4
9 comments posted 21yrs posted by 1qazse4

Voltage doubling?

I have a 1000 PSI pressure transducer that outputs a 0 - 5VDC signal. I want to double the voltage to display the press...
2 comments posted 21yrs
posted by gashmore
2 comments posted 21yrs posted by gashmore

Ideas for light sensor trigger/switch?

I've got a bit of a crazy idea to try and build one of those 'invisible' MIDI harps (I think Jean Michel Jarre once use...
7 comments posted 21yrs
posted by andyt
7 comments posted 21yrs posted by andyt

Help with Telephone Circuit

I have build the following project. http://electronicsworld.tripod.com/telephonesimages/12.gif The circuit works for th...
19 comments posted 21yrs
posted by Trudeau
19 comments posted 21yrs posted by Trudeau

Reminder

Dinner party is next Saturday (19th) @ 7:00. Let me know if you are bringing a guest so I know how much to cook. Don Pez
8 comments posted 21yrs
posted by eromlignod
8 comments posted 21yrs posted by eromlignod