The outputs of a 3914 can be tricky to use, e.g
reverse leakage etc.
You can use an Optocoulper 4N25/28 etc.
Search found 55 matches
- Tue Nov 01, 2005 9:25 pm
- Forum: General Discussion
- Topic: 4050 cmos question
- Replies: 9
- Views: 3513
- Thu Oct 27, 2005 4:27 am
- Forum: General Discussion
- Topic: switch mode PS killer
- Replies: 7
- Views: 2806
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...
- Sun Oct 23, 2005 11:37 pm
- Forum: General Discussion
- Topic: Treshold of hearing...
- Replies: 9
- Views: 3640
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 ...
- Wed Oct 19, 2005 8:58 am
- Forum: General Discussion
- Topic: tranformer overload
- Replies: 9
- Views: 3238
Re: tranformer overload
An "Auto Transformer" mainly used as a Mains
Stepup/Stepdown can have a common connected
terminal (primary to secondary).
Stepup/Stepdown can have a common connected
terminal (primary to secondary).
- Sat Oct 15, 2005 3:30 pm
- Forum: General Discussion
- Topic: Cat Heater
- Replies: 26
- Views: 10351
Re: Cat Heater
Jwax you only get x 9 from a house kat.
Strays and ferrals x 3 if you are lucky.
Strays and ferrals x 3 if you are lucky.
- Fri Oct 14, 2005 7:51 pm
- Forum: General Discussion
- Topic: Turning Heads
- Replies: 14
- Views: 5991
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.
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.
- Fri Oct 14, 2005 2:16 pm
- Forum: General Discussion
- Topic: Cat Heater
- Replies: 26
- Views: 10351
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...
- Wed Oct 12, 2005 2:10 pm
- Forum: General Discussion
- Topic: IR Pass, Visible Filter
- Replies: 15
- Views: 5137
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...
- Tue Oct 11, 2005 10:28 am
- Forum: General Discussion
- Topic: I am claiming dunce of the week
- Replies: 44
- Views: 19471
Re: I am claiming dunce of the week
Edd, they say that a picture is worth a
thousand words.<p>
thousand words.<p>
- Tue Oct 11, 2005 10:13 am
- Forum: General Discussion
- Topic: Resistors for serious dummies.
- Replies: 26
- Views: 9033
Re: Resistors for serious dummies.
Sorry wrong post.<p>[ October 11, 2005: Message edited by: Michael J ]</p>
- Thu Sep 29, 2005 8:18 pm
- Forum: General Discussion
- Topic: electric motor question
- Replies: 12
- Views: 4875
Re: electric motor question
Does the motor have Run and Start windings.<p>You may be running on just the start windings.
- Mon Sep 26, 2005 12:25 am
- Forum: General Discussion
- Topic: 12C509 programming
- Replies: 23
- Views: 9248
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...
- Fri Sep 16, 2005 6:02 pm
- Forum: General Discussion
- Topic: Picaxe-08M, how popular are they ?
- Replies: 3
- Views: 1781
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 ...
- Fri Sep 16, 2005 1:32 am
- Forum: General Discussion
- Topic: Picaxe-08M, how popular are they ?
- Replies: 3
- Views: 1781
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 ...
- Sat Aug 27, 2005 4:56 am
- Forum: General Discussion
- Topic: Homebrew iAudio X5 MP3 player car holder/ charger
- Replies: 7
- Views: 3636
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...