Help with a PS2 amplifier - Electronic Circuits Projects Diagrams Free

Sinni · 27th March 2003, 05:38 PM

I am trying to build a voltage amplifier fot boost the PS2 voltage of 5v to 12 volts. I want to put neon in me keyboard but don't want a seperate wire for the power supply. Can anyone help?

Sinni

Chippie · 27th March 2003, 05:42 PM

how much current do you need for the neon?

an invertor can be as simple as a 555 feeding a voltage multiplier or as complex as a boost regulator based on say a 78S40......... 8)

Sinni · 27th March 2003, 05:57 PM

Well i'm trying to connect StreetGlow's Hotwires http://www.streetglow.com/site/auto7.htm. After looking through their FAQ the 20" accent tube is about 1/2 amp. So guessing from that i would have to say the amperage should be pretty low.

Sinni

Chippie · 27th March 2003, 06:23 PM

So you need a switcher that will provide 12vdc at around 500mA.......from a 5vdc source........Take a look at National Semiconductors web site for applications for the LM2577 switcher.......that should do the job with a low component count

post up if you need any more help

Gene · 28th March 2003, 12:19 AM

That should look prety cool when you finish. The stores here are selling lots of low voltage neon and LED components for the inside of computers and the auto stores are selling neon like the add you posted. I never heard of adding to the keyboard though. If you do it without adding any wires will be a real trick. Hope you will post a picture.

Sebi · 28th March 2003, 06:52 AM

Don't forget to check PS2 5V output current capability.If You need 500mA on 12V boost reg.out, it sucks about 1,2A from 5V.
Maybe the circuit must be screened to avoid interference with data and clk signals.
As Chippie wrote, LM2577 the best choice, i also recommend it.

bogdanfirst · 28th March 2003, 11:05 AM

maybe i am wrong but isnt the current available on the PS/2 port limited to 500mA? so if you want 500mA for 12V you need .5 x 12/5=1.2A
how are you gonna get that from a PS/ 2 port?

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27th March 2003, 05:38 PM	(permalink)
Sinni	Help with a PS2 amplifier I am trying to build a voltage amplifier fot boost the PS2 voltage of 5v to 12 volts. I want to put neon in me keyboard but don't want a seperate wire for the power supply. Can anyone help? Sinni

27th March 2003, 05:42 PM	(permalink)
Chippie	how much current do you need for the neon? an invertor can be as simple as a 555 feeding a voltage multiplier or as complex as a boost regulator based on say a 78S40......... 8)

27th March 2003, 05:57 PM	(permalink)
Sinni	Well i'm trying to connect StreetGlow's Hotwires http://www.streetglow.com/site/auto7.htm. After looking through their FAQ the 20" accent tube is about 1/2 amp. So guessing from that i would have to say the amperage should be pretty low. Sinni

27th March 2003, 06:23 PM	(permalink)
Chippie	So you need a switcher that will provide 12vdc at around 500mA.......from a 5vdc source........Take a look at National Semiconductors web site for applications for the LM2577 switcher.......that should do the job with a low component count post up if you need any more help

28th March 2003, 12:19 AM	(permalink)
Gene	That should look prety cool when you finish. The stores here are selling lots of low voltage neon and LED components for the inside of computers and the auto stores are selling neon like the add you posted. I never heard of adding to the keyboard though. If you do it without adding any wires will be a real trick. Hope you will post a picture.

28th March 2003, 06:52 AM	(permalink)
Sebi	Don't forget to check PS2 5V output current capability.If You need 500mA on 12V boost reg.out, it sucks about 1,2A from 5V. Maybe the circuit must be screened to avoid interference with data and clk signals. As Chippie wrote, LM2577 the best choice, i also recommend it.

28th March 2003, 11:05 AM	(permalink)
bogdanfirst	maybe i am wrong but isnt the current available on the PS/2 port limited to 500mA? so if you want 500mA for 12V you need .5 x 12/5=1.2A how are you gonna get that from a PS/ 2 port?