Compact 12V operated 1W green lasershow...

[Serveurperso]

Hi photonlexicon users,

I planned to create a portable compact 12V operated 1W green lasershow !

I plan to use two of them, all I/O isolated DC-DC converter to power DT-40 Pro galvos / amplifier.

http://fr.farnell.com/mascot/8862-12...24v/dp/1183944

Theoretically, that'll give me the symetrical power supply needed : -24V/0V/+24V @ 80W per side = 3.3A per side.
I do not know the real consumption of DT40Pro, but 160 watts is enormous !

To supply the 5V OEM laser driver, I plan to use industrial DC-DC 5V @ 14A but, at this power it's a hard to find part (I found only 18-36V input "q-brick").

I think the solution is to use a hi power model-RC BEC (battery eliminator circuit) ! For example, those manufactured by EMCOTEC have big power.

Pascal

[hobbybob]

If you really run out of options, you could always go for the 12V to 220V convertors.
Those can be had up to 3kW for a reasonable price.
Not really efficient, but you can built a "normal" lasershow and hook it up to that convertor ?
I have seen people run deep fryers on a LAN party on an array of UPS'es fitted with Carbatteries that were charged by a running engine of a car using such a 3kW 12-220V convertor ;-)

[Serveurperso]

If you really run out of options, you could always go for the 12V to 220V convertors.
Those can be had up to 3kW for a reasonable price.
Not really efficient, but you can built a "normal" lasershow and hook it up to that convertor ?
I have seen people run deep fryers on a LAN party on an array of UPS'es fitted with Carbatteries that were charged by a running engine of a car using such a 3kW 12-220V convertor ;-)

Yes it's the normal option But I want the "very efficient option" for fun field and car advertising operation...
To power this as "normal lasershow" I can use a 12V 40A power supply

Pascal

[badger1666]

how do you plan on using this http://fr.farnell.com/mascot/8862-12...24v/dp/1183944
it a 24v down 12v converter not a 12v to 24v converter ??

[Serveurperso]

how do you plan on using this http://fr.farnell.com/mascot/8862-12...24v/dp/1183944
it a 24v down 12v converter not a 12v to 24v converter ??

# Input Voltage:10V to 16V
# Puissance:40.5W
# Tension, sortie:24V

My link is for 12V -> 24V ref. but 24V -> 12V exist. farnell datasheet/website have small mistakes...

Pascal

[FourDee]

# Input Voltage:10V to 16V
# Puissance:40.5W
# Tension, sortie:24V

My link is for 12V -> 24V ref. but 24V -> 12V exist. farnell datasheet/website have small mistakes...

Pascal

You can simply use a 300W power inverter. They are cheaper than one of the converters you showed, your projector will be more compact, and you won't need an external psu when you want to mains power your projector

[badger1666]

still two of them is alot bigger than a single +-24v mains supply you could fit two regular mains supplys one for galvos one for laser
, and just use a small 300w inverter rather than have a great big 12v 40amp for when you use it on mains power
as far as i can see what you are suggesting is not going to save you any space in your build
but you will spend a lot of money tring to get it right

[Serveurperso]

Yes the inverter choise is the cheaper and easier way.

But the 12V efficiency is my priority because I need only field use. And I have many model rc 12V hardware... 12V audio in car with special deep discharge battery... 150W photovoltaic panel/charge controler, switching 12V 40A PSU, batterie chargers...

...and I dont like the 50Hz stage of the inverter (bzzzzz!)...

Pascal

Edit : Finally I go for line powered version for my first laser projector because I am anxious to try it & galvo kit has PSU included