about a power supply project - Electronic Circuits Projects Diagrams Free

rippy · 3rd November 2002, 02:30 PM

I am a student of electronics in Greece and i have a project about a integrate power supply circuit(all stages)of any voltage and current.I have to explain the operation,the role of the components etc..When can i find information about this?Can you help me?Please your answers here: rippy@freemail.gr Thank you in advance.

**kinjalgp** · 10th November 2002, 04:54 AM

Try using LM317 IC based regulated power supply. You can find its datasheet on www.national.com. Regarding the working of each componenets, you can find it in any good power electronics or operational amplifiers text books.

rippy · 10th November 2002, 08:41 PM

Can you suggest me a power electronics or operational amplifiers text book?

**kinjalgp** · 11th November 2002, 11:06 AM

Hi,
The text books I know are only available in India and my not be available in your country. They are written by Indian Authors. But still the name of the text books are.
1) Operational Amplifiers - Ramakant Gayakwad
2) Operational Amplifiers - Botkar
2) Power Electronics - Bhattacharya

rippy · 15th November 2002, 07:53 AM

Can anyone help me with this circuit?

http://users.otenet.gr/~athsam/power_supply_50V_3A.htm

I have to explain the operation and the role of the componets analytically.

**mechie** · 15th November 2002, 09:51 AM

I think you will struggle to explain how this circuit works, the transistors appear to be from a different circuit to the rest.

It seems to be using a 'positive rail regulator' in the negative rail ???

**kinjalgp** · 15th November 2002, 10:18 AM

Yes correct MECHIE. Do you think that the NPN Transistor Q1 will work in the configuration it is connected? Collector is at lower potential than Emitter :!:

rippy · 15th November 2002, 11:02 AM

SO,WHAT DO YOU SUGGEST ME TO DO???I HAVE TO GIVE MY PROJECT IN A FEW DAYS!WHAT HAVE TO BE CHANGED SO THAT THE CICUIT WORKS?

**mechie** · 15th November 2002, 12:28 PM

Just a -very- quick look at the circuit -
I think every diode and every polarised capacitor wants swapping round end for end. The transistor Q1 will then be in the positive line and (conventional current flow) the current will flow into the collector and out of the emitter. The Pos and Neg output terminals need their labels swapping round.

The circuit then starts to look like the one here on ETO in the 'Electronic Projects' section labelled "Stabilised Power Supply with Current Limiting", which also has a bit of waffle explaining operation.

I don't mean to kill you off but is it right that we appear to be doing homework here? (just a thought :wink: )

Kinjal I have seen transistors used backwards for real weird circuits, I think there is some frequency response improvement or something (up at GHz) - I forget - but this configuration is as rare as hens teeth :?

amit srivastav · 8th April 2007, 02:31 PM

power electronics by PS Bhimbhra
OPAMS by Ramakant S gayekwad

**Nigel Goodwin** · 8th April 2007, 03:16 PM

Perhaps you should try reading the date on the posts! - FOUR AND A HALF YEARS AGO!!!!!.

-=GST=- Nemisis (cs/cz) · 9th April 2007, 01:40 AM

Quote:

Originally Posted by Nigel Goodwin

Perhaps you should try reading the date on the posts! - FOUR AND A HALF YEARS AGO!!!!!.

sorry to have to post on this but you comment made me laugh so much! just had to tell you Nigel

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3rd November 2002, 02:30 PM	(permalink)
rippy	about a power supply project I am a student of electronics in Greece and i have a project about a integrate power supply circuit(all stages)of any voltage and current.I have to explain the operation,the role of the components etc..When can i find information about this?Can you help me?Please your answers here: rippy@freemail.gr Thank you in advance.

10th November 2002, 04:54 AM	(permalink)
kinjalgp	Try using LM317 IC based regulated power supply. You can find its datasheet on www.national.com. Regarding the working of each componenets, you can find it in any good power electronics or operational amplifiers text books. __________________ "There is no way to peace, peace is the way!"

10th November 2002, 08:41 PM	(permalink)
rippy	Can you suggest me a power electronics or operational amplifiers text book?

11th November 2002, 11:06 AM	(permalink)
kinjalgp	Hi, The text books I know are only available in India and my not be available in your country. They are written by Indian Authors. But still the name of the text books are. 1) Operational Amplifiers - Ramakant Gayakwad 2) Operational Amplifiers - Botkar 2) Power Electronics - Bhattacharya __________________ "There is no way to peace, peace is the way!"

15th November 2002, 07:53 AM	(permalink)
rippy	Can anyone help me with this circuit? http://users.otenet.gr/~athsam/power_supply_50V_3A.htm I have to explain the operation and the role of the componets analytically.

15th November 2002, 09:51 AM	(permalink)
mechie	Bang Smoke ? I think you will struggle to explain how this circuit works, the transistors appear to be from a different circuit to the rest. It seems to be using a 'positive rail regulator' in the negative rail ??? __________________ I need a memory upgrade ... My head is full !

15th November 2002, 10:18 AM	(permalink)
kinjalgp	Yes correct MECHIE. Do you think that the NPN Transistor Q1 will work in the configuration it is connected? Collector is at lower potential than Emitter :!: __________________ "There is no way to peace, peace is the way!"

15th November 2002, 11:02 AM	(permalink)
rippy	SO,WHAT DO YOU SUGGEST ME TO DO???I HAVE TO GIVE MY PROJECT IN A FEW DAYS!WHAT HAVE TO BE CHANGED SO THAT THE CICUIT WORKS?

15th November 2002, 12:28 PM	(permalink)
mechie	Quick thoughts on power supply Just a -very- quick look at the circuit - I think every diode and every polarised capacitor wants swapping round end for end. The transistor Q1 will then be in the positive line and (conventional current flow) the current will flow into the collector and out of the emitter. The Pos and Neg output terminals need their labels swapping round. The circuit then starts to look like the one here on ETO in the 'Electronic Projects' section labelled "Stabilised Power Supply with Current Limiting", which also has a bit of waffle explaining operation. I don't mean to kill you off but is it right that we appear to be doing homework here? (just a thought :wink: ) Kinjal I have seen transistors used backwards for real weird circuits, I think there is some frequency response improvement or something (up at GHz) - I forget - but this configuration is as rare as hens teeth :? __________________ I need a memory upgrade ... My head is full !

8th April 2007, 02:31 PM	(permalink)
amit srivastav	power electronics by PS Bhimbhra OPAMS by Ramakant S gayekwad

8th April 2007, 03:16 PM	(permalink)
Nigel Goodwin	Perhaps you should try reading the date on the posts! - FOUR AND A HALF YEARS AGO!!!!!. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk