Thread: Diy 400w Psu

does this have a startup / shutdown controller? If not, I have some ideas that may be useful for you.

If you don't decide to go commercial, will you be releasing the schematics?

I wouldn't mind beta testing for you. I have an athlon64 4200+ that I can use.

vfinterceptor

How about marketing it as a kit?

it's very difficult to tune it, needed special tools , i wrote about them upper. No many peoples have that tools. Some parts of scheme needs precision tune , and couldn't be possible without that tools. If in process of diyng kit somebody make mistake - the FETs could BANG- and destroy some parts of sheme. So if somebody will have any problems during assembly - without minimum oscilloscope - he couldn't slove this.
Thats why i think that making a kit isn't a good idea- no many peoples can assemble it by themselfs. While i developed it i burn many FETs.

People like myself are adept at following directions and assembly, but I'm no engineer.

Respect to you I think you are very nice diyer
meddler
vfinterceptor
Ok. Now again about controller.

Pic simplest controller - 5 seconds before startup , and 15 seconds before shutdown, it monitors voltage of battery, and have a rem output to control amp or lcd - it takes hi state after 0.5 sec( but 2 sec - is better) of carputer on , and low state before carputer shutdown. When it shutdowning, it waits 40 sec , if windows isn't shutdown- controller shutdown all system hardly.

Some pots to adjust the startup and shut down timing would be nice.

Also, and this would make it just about perfect for in car use, how about some adjustable timed outputs for relays to control startup of items such as amplifiers? (to avoid the dreaded thump on windows start)

It's a good idea , i thinked about it. As you can see - it has a one output - for control amps or lcd, or together i think 2 secs turn on delay after startup of carputer and turn off before shutdown carputer - provides no buzzing in speakers But the many regimes it supports, the many roblems users could have in the future.Look at this forum- every week we can read here threads about different problems with controllers of m2 or another , but i think that many of them are problems of right wiring and jumpers. So the much simply system, the much safely it.
PSU don't support stand by mode to prevent drying battery ( remember - many thredas was here), but it provides NO TAKING ANY POWER IN OFF STATE ( when "acc" gets ground or nothing- ign off).
So 5 sec before startup and 15 before shutdown, i think, is optimal delays, but using external controller , about you wrote we can drive acc wire with different delays, so you can get some time pots, but minimum 5 and 15 secs. So i think to build external controller, which could be reprogrammed by user ( to provide different time delays).
But simply it's enough 3 position switch - to prevent shutdowning of carputer after ignition off, but using this you must understand that battery drying very fast using a powerfull system, i think you saw it using powerfull inverter

So i think with that minimum delays it can work with any external controller nice. But now it provides a lot of minimum functions needed in car- startup/shutdown delays, and one remote turn on/off output to amp or lcd or what do you want with some delay after starup (before shutdown) carputer and volage monitoring - to prevent battery die.

If you don't decide to go commercial, will you be releasing the schematics?

No i wil not release schematics, without enough knowledge assemble of this could be dangerous to health.( burning wires and banging fets and battery - isn't a good picture and very dangerous for eyes )

I wouldn't mind beta testing for you. I have an athlon64 4200+ that I can use.

I tested it on hardware which i wrote upper, and with full load by halogen lamps. But i heard that some motherboards could have problems with some PSUs. Today tested on athlon 2000+ based system - work fine. Don't think that could be problems , but i can not except it.

Oh and about the apologies for your english, none needed. Your english is better than my (whatever your native tongue is, russian?) ever while be!

Thanks a lot. Yes my native language is russian, but i am not from Russia, I am from Kyrgyzstan. But it's difficult to me write right words, when i am writing i make many mistakes. after i had wrote the message i trying to find bugs and repair them - it takes time But i am learning to don't make mistakes.

I really hope you find a way to market this affordably, it would solve alot of the problems I'm having to "band-aid" right now. I'm running a p4 2.26 Ghz and power is a bit of an issue right now. I'm using an inverter currently (not ideal) and a DSATX is pretty closed to maxed out for what I'm running.

could you please describe your hardware fully ? what motherboard and memory do you use ?

Oh i don't wrote about protections yet. It has a voltage supervisor tps3510 inside , which provides under/over voltage protection 5V and 3.3v rails, overvoltage protection 12V rail , short circuit protection.

This PSU provides -12V also.
-5 v don't provides- it was used by old isa cards, but i heard that some nvidia chipsets needed in it - anybody knows something about nvidia chipsets which takes -5V rail ?

Best regards to all.

Ok. Add some some pics - thats how it looks finally assembled.
And I added relay inside- to provide more current from "remote" output- there are 2 wires - which connected to relay pins - so you can use it as you want - they shorts after 2 secs after "power button on"-so it could drive "remote", relays and etc- i think it's a better solution then using transistor to drive "remote"

But can't get some special tools from my local distributor -to measure currents,and give you all specifications..... huh I made order and waiting them now
And about the price .....i think it will be near 200$ ,little lower or higher( don't know yet).... and for beta-testers little bit less

Maybe he could post 2 over here

Some days ago I made a hardcore test of this device, by using halogen h4 lamps and find some bugs. I fixed them , and here is what currents I got continuously :
12V 16-17A
5v+5vsb 30A
3.3v 20A
-12v 0.15A

At input voltage 13.6 V - with working engine
And it's survives cranking
Now i am writing user's manual , I'll post it later here in pdf.
Oh - here is one problem - this psu culdn't be placed at standard place - problem wires , and I'm thinking about it

Originally Posted by MibMib

Some days ago I made a hardcore test of this device, by using halogen h4 lamps and find some bugs. I fixed them , and here is what currents I got continuously :
12V 16-17A
5v+5vsb 30A
3.3v 20A
-12v 0.15A

At input voltage 13.6 V - with working engine
And it's survives cranking
Now i am writing user's manual , I'll post it later here in pdf.
Oh - here is one problem - this psu culdn't be placed at standard place - problem wires , and I'm thinking about it

Do not worry about your English, it is far better than my Russian

TruckinMP3 Thanks a lot
Ok, I change my signature