Hobby Electronics Basics

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power sensors

I was just wondering why RF power sensors designed for power meters are so much more expensive than integrated circuits...
3 comments posted 19yrs
posted by mike7411
3 comments posted 19yrs posted by mike7411

driving a relay with 24vdc low current IO

I have a board with a bunch of TTL-level IO. It can handle a few milliamps (about 10) per IO. I would like to be able t...
8 comments posted 19yrs
posted by yan
8 comments posted 19yrs posted by yan

data structure in spice source code

Hello, Can anybody please tell me, how to print the matrix formed during spice simulation. I am interested in seeing th...
0 comments posted 19yrs
posted by dilip.sesh
0 comments posted 19yrs posted by dilip.sesh

How to count pulses per second ?

Hi, I'm hoping someone could help me create a very basic circuit which would: Count the number of pulses it receives pe...
103 comments posted 19yrs
posted by tiberian5
103 comments posted 19yrs posted by tiberian5

quarter-pointed?

Hello. What 'quarter-pointed' means in the following sentence? The receptacles should be "quarter-pointed" on the long w...
2 comments posted 19yrs
posted by zyuuzika
2 comments posted 19yrs posted by zyuuzika

More Basic Questions From Electronman

Basics group, Thanks again for all your helpful responses last week. Also, I purchased an old copy of Forest Mims' "Get...
5 comments posted 19yrs
posted by zken
5 comments posted 19yrs posted by zken

use AC lights on DC circuit

My son and I have a project that involves converting a strand of christmas lights(110AC) to run off of 12v DC,no AC inpu...
1 comments posted 19yrs
posted by bshirley5
1 comments posted 19yrs posted by bshirley5

driving an LED with a 7406 question

Hello, I have a question about driving an LED with a 7406. Basically I have an MCU going into a 7406 inverter going int...
56 comments posted 19yrs
posted by panfilero
56 comments posted 19yrs posted by panfilero

need help with infrared leds

I am playing with some infrared leds and phototransistors. My project is a pinewood derby timer. It's computer based an...
3 comments posted 19yrs
posted by ufjfjrfj
3 comments posted 19yrs posted by ufjfjrfj

lm338 overheating

Hi all i am using the lm 338 if i remember rightly the 5amp adjustable reg and have set it up to put out exactly 8.5v t...
1 comments posted 19yrs
posted by roadrunner_uk_98
1 comments posted 19yrs posted by roadrunner_uk_98

Developing a Circuit Simulator from Scratch

Hi, Can anyone give me some directions on how to develop a circuit simulator from scratch. I need to develop a simple s...
19 comments posted 19yrs
posted by komminenibalaji
19 comments posted 19yrs posted by komminenibalaji

basic question

the speed sendor/sensor on my streetrod transmission turns on and off (pulses) 12v sending it to the speedometer. I hav...
3 comments posted 19yrs
posted by Idontthinkso
3 comments posted 19yrs posted by Idontthinkso

static-proofing an office table

My "lab" is just a couple of folding tables in my home office. When I need to anti-static myself, I have to search for...
2 comments posted 19yrs
posted by dj
2 comments posted 19yrs posted by dj

DSL and listening to audio on the internet

I hope this is not too off topic (I asked the question in a DSL forum,but the forum is rather dead),but a couple weeks...
0 comments posted 19yrs
posted by tombates
0 comments posted 19yrs posted by tombates

ionization

I dint understand the charge neutrality in semiconductors....I know that is is large topic....I understood bits and pei...
1 comments posted 19yrs
posted by strider014
1 comments posted 19yrs posted by strider014