Search found 55 matches

by Michael J
Tue Nov 01, 2005 9:25 pm
Forum: General Discussion
Topic: 4050 cmos question
Replies: 9
Views: 1711

Re: 4050 cmos question

The outputs of a 3914 can be tricky to use, e.g
reverse leakage etc.
You can use an Optocoulper 4N25/28 etc.
by Michael J
Thu Oct 27, 2005 4:27 am
Forum: General Discussion
Topic: switch mode PS killer
Replies: 7
Views: 1394

Re: switch mode PS killer

A lot of switchmode supplies require a minimum load connected at all times. Even some of these Plugpack/Wallwart supplies that can deliver 2-4 Amps 9, 12 Volts etc, say they need a minimum of e.g. 100mA load. These supplies require some sort of feedback in many parts of the circuit to function corre...
by Michael J
Sun Oct 23, 2005 11:37 pm
Forum: General Discussion
Topic: Treshold of hearing...
Replies: 9
Views: 1697

Re: Treshold of hearing...

I get that sometimes as well. I was a live sound Engineer for 12 years. But I do not have tinnitus.<p>Not only do the little sound detecting hairs in the inner ear pick up vibration they also can put out vibration they have learned in recent times.<p>Its probably your ears just winding down after a ...
by Michael J
Wed Oct 19, 2005 8:58 am
Forum: General Discussion
Topic: tranformer overload
Replies: 9
Views: 1580

Re: tranformer overload

An "Auto Transformer" mainly used as a Mains
Stepup/Stepdown can have a common connected
terminal (primary to secondary).
by Michael J
Sat Oct 15, 2005 3:30 pm
Forum: General Discussion
Topic: Cat Heater
Replies: 26
Views: 5954

Re: Cat Heater

Jwax you only get x 9 from a house kat.
Strays and ferrals x 3 if you are lucky. :eek:
by Michael J
Fri Oct 14, 2005 7:51 pm
Forum: General Discussion
Topic: Turning Heads
Replies: 14
Views: 3076

Re: Turning Heads

A few years back I recall they had invented a set
of VR (Virtual Reality) goggles or glasses for a
game, they actually had inbuilt sensors that tracked the movement of the users eye itself to provide feedback for the game.<p>Probably overkill for what you need, and over
budget as well.
by Michael J
Fri Oct 14, 2005 2:16 pm
Forum: General Discussion
Topic: Cat Heater
Replies: 26
Views: 5954

Re: Cat Heater

The dimmer should work fine as long as the Max Load rating for it is not exceeded(for light dimmers here 240V 500W is common).<p>An Incandecent light and Heating element are both resistive loads. If you have a dimmer for a fan it's probably even better as a fan is an inductive load and they are usua...
by Michael J
Wed Oct 12, 2005 2:10 pm
Forum: General Discussion
Topic: IR Pass, Visible Filter
Replies: 15
Views: 2638

Re: IR Pass, Visible Filter

A hundred or so years ago, well seems that way, we used Automotive Exhaust paint to colour the flood lights for a small Band I worked with.<p>We used what we called Par 38, 240V 150W, reflective flood lights.<p>They get quite hot but the Hi Temp paint worked, it came in a few colours, red, blue, yel...
by Michael J
Tue Oct 11, 2005 10:28 am
Forum: General Discussion
Topic: I am claiming dunce of the week
Replies: 44
Views: 10113

Re: I am claiming dunce of the week

Edd, they say that a picture is worth a
thousand words.<p>Image
by Michael J
Tue Oct 11, 2005 10:13 am
Forum: General Discussion
Topic: Resistors for serious dummies.
Replies: 26
Views: 4450

Re: Resistors for serious dummies.

Sorry wrong post.<p>[ October 11, 2005: Message edited by: Michael J ]</p>
by Michael J
Thu Sep 29, 2005 8:18 pm
Forum: General Discussion
Topic: electric motor question
Replies: 12
Views: 2426

Re: electric motor question

Does the motor have Run and Start windings.<p>You may be running on just the start windings.
by Michael J
Mon Sep 26, 2005 12:25 am
Forum: General Discussion
Topic: 12C509 programming
Replies: 23
Views: 4365

Re: 12C509 programming

Dacflyer, go check out, rev-ed.co.uk or picaxe.co.uk, same thing as Lin Farquhar suggested. They have taken the PIC12F675 / PIC12F683 and inserted their own Bootstrap program into them. They then sell them as the Picaxe-08/08M, now in doing this they have used most of the internal memory, you now on...
by Michael J
Fri Sep 16, 2005 6:02 pm
Forum: General Discussion
Topic: Picaxe-08M, how popular are they ?
Replies: 3
Views: 893

Re: Picaxe-08M, how popular are they ?

Thanks Phil and Engineer,<p>I purchased my first Picaxe-08M last week. It came as a kit consisting of -<p>Code # AXE092 "Schools Experimenter" PCB, approx 1 1/2" sq. PicAxe-08M chip, (8 Pin). 16 other components. Piezo sounder. 3 cell Battery Box c/w integral switch. Serial to Stereo plug Programmin...
by Michael J
Fri Sep 16, 2005 1:32 am
Forum: General Discussion
Topic: Picaxe-08M, how popular are they ?
Replies: 3
Views: 893

Picaxe-08M, how popular are they ?

I live in Australia. Over the past few months our only locally published electronics magazine, has been running has been running tutorials on the Picaxe-08M, written by the UK developers Rev-Ed. As Nuts & Volts magazine is not readily available here I was wondering it they were popular there in the ...
by Michael J
Sat Aug 27, 2005 4:56 am
Forum: General Discussion
Topic: Homebrew iAudio X5 MP3 player car holder/ charger
Replies: 7
Views: 1849

Re: Homebrew iAudio X5 MP3 player car holder/ charger

Hi BH,<p>I would be checking to see it the output of your cradle is pulsed or not first.<p>Most of the newer chargers are pulsed types they use higher currents and charge more efficiently for the longevity of the cells etc.<p>Otherwise run the unit flat and try to measure the actual charging current...