Hobby Electronics Basics

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Beginner Relay Question

Hi all, I'm playing around with some relays and need some guidance. I have this relay: http://www.radioshack.com/produc...
7 comments posted 19yrs
posted by addiebspamnot
7 comments posted 19yrs posted by addiebspamnot

Narrow pulse generation

Hello, Anyone have good ideas on generating 5nS pulses into a 100ohm load, but the load can be anything from an open ci...
31 comments posted 19yrs
posted by spam-not
31 comments posted 19yrs posted by spam-not

Piezo to normal speaker conversion

I have a device with a built-in piezo speaker, but I'd like to get a regular "line out" or normal speaker output from it...
7 comments posted 19yrs
posted by sixteen_thirtytwo
7 comments posted 19yrs posted by sixteen_thirtytwo

DC 15 volt adapter question

HI, I don't have any clue about electricity, I would like to ask a question regarding DC adapters. How can I create 15...
1 comments posted 19yrs
posted by mike888
1 comments posted 19yrs posted by mike888

Gasoline powered vehicles

1)what are the chemical reactions for the combustion of octane( assuming that the gasoline is octane)? 2)
7 comments posted 19yrs
posted by 62039
7 comments posted 19yrs posted by 62039

Stable Voltage Supply

I need a stable and precise Voltage source to supply a Data Acquisition system. I need 5V DC. What are my options for a...
4 comments posted 19yrs
posted by gtslabs
4 comments posted 19yrs posted by gtslabs

Sharing memory

Hi guys: I'm an ME and I have an application where I'd like to use two Basic Stamp microcontrollers working together. O...
5 comments posted 19yrs
posted by eromlignod
5 comments posted 19yrs posted by eromlignod

comp wont start after plugging into 230v plug

i forgot to switch to 230v when plugging in my american desktop in france, there was a pop, and now it wont start. did i...
3 comments posted 19yrs
posted by alexeiofnewark
3 comments posted 19yrs posted by alexeiofnewark

How do I find microphone output voltage?

Hello, How can I calculate the output level of a microphone, I assume it is found from the Sensitivity , but how? For e...
6 comments posted 19yrs
posted by taperecorder
6 comments posted 19yrs posted by taperecorder

bike computer to PC interface

Hi All - I found this newsgroup and was wondering if anyone could help me. I'd like to connect a magnetic sensor (bicyc...
4 comments posted 19yrs
posted by pete_tomson
4 comments posted 19yrs posted by pete_tomson

Cheap caps

Anyone know where to get any cheap electrolytic caps above 35V (anywhere from 35V to 200V)? (used as power supply filte...
2 comments posted 19yrs
posted by Jon_Slaughter
2 comments posted 19yrs posted by Jon_Slaughter

Extech MM560 - Micronta 22-167 Shootout

Got my new Extech MM560 today, pretty cool. Haven't had much opportunity to play with it much yet, but I did a few meas...
37 comments posted 19yrs
posted by spam-not
37 comments posted 19yrs posted by spam-not

Driving red/green LED from high/low/tri-state output

I have a battery charger IC that tells you the IC's function via a "staus" pin output that's one of three states: Hi-Z...
13 comments posted 19yrs
posted by JKolstad71HatesSpam
13 comments posted 19yrs posted by JKolstad71HatesSpam

LM386 max input spec is 400mV?

Data sheet for the LM386 audio amp shows a maximum input limit at +/- 400mV. What happens if you tie the input to a pot...
12 comments posted 19yrs
posted by wrongaddress
12 comments posted 19yrs posted by wrongaddress