Hobby Electronics Basics

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Truth Table for Any Logic

Can anyone tell me the proper way to represent an ANY two or ANY three in a truth table? Example 10 inputs. Any five in...
15 comments posted 18yrs
posted by jnez367
15 comments posted 18yrs posted by jnez367

LED voltage bar graph

I'd like to have a "bar graph" of LEDs tell me how far along my 6V SLA is on its charging. I saw this, but I think it's...
9 comments posted 18yrs
posted by mrdarrett
9 comments posted 18yrs posted by mrdarrett

Golf trolley dc motor controllers

Hi Golf trolley motor controllers. Anyone know where to go to find the circuits for the common makes or typical circuits...
1 comments posted 18yrs
posted by ted.pca
1 comments posted 18yrs posted by ted.pca

Voltage Scaling

Hi all, Can anyone help with the following, I need to scale a control voltage which ranges from 0VDC to 5VDC, to: 1. 0V...
10 comments posted 18yrs
posted by ggold6
10 comments posted 18yrs posted by ggold6

First oscilloscope

Hi all, I do pic programming, Ir circuits, analogue circuits and use 433MHz AM TX/RX. I want to get an oscilloscope to...
10 comments posted 18yrs
posted by garethrichardadams
10 comments posted 18yrs posted by garethrichardadams

4046 VCO

Is there an easy way (e.g. diode and resistor) to change the duty cycle of the CD4046 VCO? I would try on breadboard; b...
4 comments posted 18yrs
posted by ajholme
4 comments posted 18yrs posted by ajholme

Coil Winding

I'm winding a coil for a home built regen radio, and I need to know how much wire I need. The coil form is a 2 inch mai...
6 comments posted 18yrs
posted by the1930s
6 comments posted 18yrs posted by the1930s

How do I know what a 110 volt outlet is?

The instructions for a wireless headset I bought said to insert the AC adapter into a 110 volt outlet. I have a pretty...
13 comments posted 18yrs
posted by greatgrains
13 comments posted 18yrs posted by greatgrains

Increase AC mains frequency?

If the power companies increased the frequency of AC mains current from 60 Hz to something more like 1 kHz, would this...
18 comments posted 18yrs
posted by mrdarrett
18 comments posted 18yrs posted by mrdarrett

Question About Safety Of Voltage Supply

I'm not sure if I should be asking this this type of question here, but couldn't find another suitable newsgroup, so he...
22 comments posted 18yrs
posted by the1930s
22 comments posted 18yrs posted by the1930s

CSA & UL Approvals

Can any one tell me if CSA listed is the equivalent to UL Listed for electric home generators? Thanks W
3 comments posted 18yrs
posted by thewolf
3 comments posted 18yrs posted by thewolf

LM386 output RC purpose

The datasheet for an LM386 amplifier shows a resistor and capacitor in series at the output: 250 uF LM386 +|| output --...
3 comments posted 18yrs
posted by news
3 comments posted 18yrs posted by news

induction motor basics

I saw on the nameplate of an induction motor that it contains two sets of voltage and current ratings. I'm wondering wh...
4 comments posted 18yrs
posted by stanigator
4 comments posted 18yrs posted by stanigator

Regeneration Control Pot

I'm building a regen radio, but not too sure if I should use a linear taper pot, or audio taper. Is there really any dif...
2 comments posted 18yrs
posted by the1930s
2 comments posted 18yrs posted by the1930s

240V->120V transformer heats up device?

Hi I live in Europe and have a network router that operates powered by a power supply (transformer of 240VAC->5VDC) I b...
3 comments posted 18yrs
posted by interuser
3 comments posted 18yrs posted by interuser