Hobby Electronics Basics

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Capacitor Dielectric Material?

Hi I have a question (mainly of academic interest) about capacitors. I read in my physics text book that polar substanc...
18 comments posted 20yrs
posted by rolandpj
18 comments posted 20yrs posted by rolandpj

From 12V DC to 5+ V DC How to?

Hi all, I should probably know this but I am not sure. I have a motorcycle that has a 12V output jack. I have a device...
9 comments posted 20yrs
posted by trezaei
9 comments posted 20yrs posted by trezaei

Opamp problem

hello, I made a logic probe circuit using Pspice. The theory works, but i implemented it, the circuit gives me weird va...
17 comments posted 20yrs
posted by lerameur
17 comments posted 20yrs posted by lerameur

Voltmeter Question !!!!

Hello again, I have a vary basic voltmeter (mastech M-830B) and I have a question about the AC measurement setting. I k...
10 comments posted 20yrs
posted by jo.jo.uk
10 comments posted 20yrs posted by jo.jo.uk

need microcontroller project

i need a project,programmable timer based on microcontroller which controls upto eight devices,each according to the pro...
11 comments posted 20yrs
posted by nithinmulley
11 comments posted 20yrs posted by nithinmulley

1PPS and 1 PPM signals driving

I have a TM4 GPS unit gives o/p as 10 MHz sine wave, 1PPS , 1PPM signals (100 ms on time squre wave)... I would like to...
0 comments posted 20yrs
posted by nds.pune
0 comments posted 20yrs posted by nds.pune

5 in 1 Jumpstarter

In the Sprotsman's Guide, I saw a "5 in 1 Jumpstarter," that has an air compressor, , 12 Volt Power Inverter, as well a...
3 comments posted 20yrs
posted by mea305
3 comments posted 20yrs posted by mea305

Voltage divider

Hello, In theory, if I take 12v supply, put it through two identical resistance in series,which are grounded. I should...
7 comments posted 20yrs
posted by lerameur
7 comments posted 20yrs posted by lerameur

IEC Data Dictionary

I am looking for something similar to this http://std.iec.ch/iec61360/iec61360.nsf/TreeFrameset?OpenFrameSet for Electr...
0 comments posted 20yrs
posted by quanghoc
0 comments posted 20yrs posted by quanghoc

Using Battery with Charger and Macerator

I am hopfeul that this will be my last message about this issue. I am almost complete with this project; but I have one...
1 comments posted 20yrs
posted by mea305
1 comments posted 20yrs posted by mea305

Making an ink-level sensor for an inkjet printer

After refilling one of the Canon inkjets with the newer chipped carts (ip4200, etc), one loses the ability to monitor t...
25 comments posted 20yrs
posted by wmth2581
25 comments posted 20yrs posted by wmth2581

555 timer ref card

Everywhere you can find 555 diagrams with the pin numbers OR the signal names OR the internal functional diagram. Or of...
1 comments posted 20yrs
posted by source
1 comments posted 20yrs posted by source

splitting voltage

hello everyone. ive been working on a project for awhile, and im so close to completion exception for one little proble...
20 comments posted 20yrs
posted by randomname12345
20 comments posted 20yrs posted by randomname12345

Peak to Peak

When we say there is 110V AC, is that peak to peak?
73 comments posted 20yrs
posted by wazdesign
73 comments posted 20yrs posted by wazdesign