Hobby Electronics Basics

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Quick blow fuses ?

Hello all, A question about fuses: If a Quick Blow (glass type, 20mm) fuse is rated 250V 1A can I use it to protect a 9v...
6 comments posted 22yrs
posted by littlebilly
6 comments posted 22yrs posted by littlebilly

Ever find errors in TAB books?

TAB has published books for the aviation market and electronics hobby market for many years. The electronics books are...
5 comments posted 22yrs
posted by mccullar
5 comments posted 22yrs posted by mccullar

Requirement

Hellow. I'm looking for someone that can provide me with datasheet for TDA1085A. I found datasheet for tda1085c, but the...
0 comments posted 22yrs
posted by Rok.Sitar
0 comments posted 22yrs posted by Rok.Sitar

Strange Mosfet Results

I'm trying to fade some lights off slowly using a mosfet (see separate posting Fading Lights from 22 July) driven from...
27 comments posted 22yrs
posted by pmolsen
27 comments posted 22yrs posted by pmolsen

I this power supply good?

Hello, Is the following psu any good http://www.redcircuits.com/Page36.htm The voltage reference is taken from the outp...
5 comments posted 22yrs
posted by littlebilly
5 comments posted 22yrs posted by littlebilly

inductor questions

The Jameco catalog doesn't have any inductors that are 1000 micro-henrys. Only less. Can these be connected in parallel...
6 comments posted 22yrs
posted by etpm
6 comments posted 22yrs posted by etpm

Peak current to charge a capacitor

How do I calculate the peak current flow when charging a capacitor? To be specific I want to connect a capacitor (among...
8 comments posted 22yrs
posted by pmolsen
8 comments posted 22yrs posted by pmolsen

Please help with battery desulfator circuit

Greetings, I'm going to build the battery desulfator circuit described here: www.shaka.com/~kalepa/n_channel_schem.gif...
2 comments posted 22yrs
posted by etpm
2 comments posted 22yrs posted by etpm

LCD Monitors question

I have a question which was posed to me yesterday. "I" am not familiar with LCD Computer Monitors from Lap tops past th...
6 comments posted 22yrs
posted by FFSTA17NO
6 comments posted 22yrs posted by FFSTA17NO

Question about design of clocking circuit

Disclaimer: I am not a student, but a home hobbyist trying to work out a problem. Here's the situation. I have a 1Mhz o...
5 comments posted 22yrs
posted by ron
5 comments posted 22yrs posted by ron

What is the reason for R7 in 317 regulator ?

Hello, Does anyone know the 5A COnstant Volatge/Constant Current Regulator from the LM117/LM317A/LM317 regulator, it's...
5 comments posted 22yrs
posted by littlebilly
5 comments posted 22yrs posted by littlebilly

AT Power Supply Minimum Loads

I have been playing with an old AT computer power supply and found that for the PSU to stay ON, a minimum load of about...
3 comments posted 22yrs
posted by rpaisley4
3 comments posted 22yrs posted by rpaisley4

Solenoid problem?

Hello All, I have an old Vinyl cutter that can cut rubber using a 24v cont duty cycle solenoid. My question is: Can the...
4 comments posted 22yrs
posted by holen1man
4 comments posted 22yrs posted by holen1man

mounting an electronics project

Hello sci.electronics.basics I hope this post is not off topic. If so my appologies. Also since I dont really know what...
7 comments posted 22yrs
posted by david_removeablejunk_.rolph
7 comments posted 22yrs posted by david_removeablejunk_.rolph

Op-Amp Problem

Hi, I'm using an LM358 op-amp to amplify a signal. The signal is AC and has a peak-to-peak value of 5mV. The op-amp is...
8 comments posted 22yrs
posted by mike
8 comments posted 22yrs posted by mike