Developmental PS for Audio Power Amp

[Krisfr]

Hey guys

Starting a Thread to finish up a PS for the KO amp development.

First out of the box...

The transformer needs to have clarification, as to what each lead does. This is an older transformer out of a receiver.

Any ideas? as to the color code of the leads OR how to go about systematically testing to determine which lead is What...

There are two
2 blue
2 red
2 orange
2 green
2 white
2 brown

the blue pair and one brown and one white come out of one side

the rest come out the other

it is potted and I believe it is a toroidal

[Krisfr]

ok

the 2 reds and the white on the output side form a circuit, the white is the center tap
the 2 orange and the 2 greens form a similar center tap with the brown as center

the blues have about 400 u ohms across them
the brown and white on the input side have about 900 u ohms

I found the manufacturer in Malaysia, emailed and asked them for specs, it is an old Japan-Malaysia company. They say that they make 150000 transformers a month for audio nice looking stuff. Company name is Bando.

I am almost sure that the input side is set up for 110 / 220 I have to figure it out.

I am going to put the pictured display on the final unit... IF I can get it up and running.

The caps that were in the circuit are 22,000 at 71 volts..So I am hoping for something near that

[luka]

hey that looks good
next, glcd and plote the past voltages, as they sag

[Krisfr]

Originally Posted by luka

hey that looks good
next, glcd and plote the past voltages, as they sag

I will be doing a hundred, just to get the input ac and output dc to show...

I will save the fancy stuff for later...

[luka]

there could be a faster way...flowcode
I bet it would be very easy

and how awsome would that look

[Krisfr]

Originally Posted by luka

there could be a faster way...flowcode
I bet it would be very easy

and how awsome would that look

Tell me more, I am very interested

[luka]

well it is graphical programing, pic or avr or arm


This is how it looks... and what you have, is glcd also
now, I will have to say, that apart from bolks they sell with this type of lcd, I'm not sure what kind would be needed

But other things like ADC, interrupt, 2x 16 or other lcds, pwm, stepper motor, 7 segment and so on is ultra easy
really fun way to program

[Krisfr]

Luka:

Does this system work with Arduino?

I have programed in about 11 different languages from GWBasic to AutoLisp but I have never seen anything like that...

Here is the box I am working on, I will put in the above pictured Transformer IF I can get it to work and understand the specs of it.

And MAYBE stick the display in if time permits...

I have to open it up a little and Wire and Wire it UP...I hate construction of boxes like this, but I had to put together SOMETHING fast, not my best BUT functional to say the least.

I am open for suggestion from any and all sources, tell me quick before I start wiring this beast.

[luka]

Do you have any external program for flashing avr? like I have pickit, and I can upload any code as long as it is hex and all that. What is full ic ID that is on board? ATmega328?

You can program any of below avr's

Target microcontrollers - AVR
AT90CAN128 , AT90CAN32 , AT90CAN64 , AT90PWM1 , AT90PWM2B , AT90PWM3B ,
AT90S2313 , AT90S2323 , AT90S4433 , AT90S8515 , AT90S8535 , AT90USB1286 , AT90USB1287 ,
AT90USB162 , AT90USB646 , AT90USB647 , AT90USB82 , ATMEGA103 , ATMEGA128 , AT-
MEGA1280 , ATMEGA1281 , ATMEGA1284P , ATMEGA16 , ATMEGA161 , ATMEGA162 , AT-
MEGA163 , ATMEGA164 , ATMEGA164P , ATMEGA168 , ATMEGA168P , ATMEGA169 , AT-
MEGA169P , ATMEGA16M1 , ATMEGA16U4 , ATMEGA2560 , ATMEGA2561 , ATMEGA32 , AT-
MEGA323 , ATMEGA324 , ATMEGA324P , ATMEGA325 , ATMEGA3250 , ATMEGA3250P , AT-
MEGA325P , ATMEGA328 , ATMEGA328P , ATMEGA329 , ATMEGA3290 , ATMEGA3290P , AT-
MEGA329P , ATMEGA32C1 , ATMEGA32M1 , ATMEGA32U4 , ATMEGA32U6 , ATMEGA48 , AT-
MEGA48P , ATMEGA64 , ATMEGA640 , ATMEGA644 , ATMEGA644P , ATMEGA645 , AT-
MEGA6450 , ATMEGA6450P , ATMEGA645P , ATMEGA649 , ATMEGA6490 , ATMEGA6490P ,
ATMEGA649P , ATMEGA64C1 , ATMEGA64M1 , ATMEGA8 , ATMEGA8515 , ATMEGA8535 ,
ATMEGA88 , ATMEGA88P , ATTINY13 , ATTINY167 , ATTINY2313 , ATTINY24 , ATTINY25 ,
ATTINY26 , ATTINY261 , ATTINY44 , ATTINY45 , ATTINY461 , ATTINY84 , ATTINY85 , ATTI-
NY861 , ATTINY87

If you can flash ic outside that standart program sketch or how is it called, then give it a go, it is super easy if you don't know anything about programing, and at the same time very powerfull, it has so much things, like can protocol, spi, i2c, midi, usb,....

[Krisfr]

Here is the easy way for the AC Display for less than 10 bucks, but it needs a power supply ( which could be a wall transformer type) to run...

I can tie it to the output of the Variac....

I am going to finish this box up and get it on the air.

I have got to stuff and test some amp boards, but all of this was dependent on have some form of testing power supply. I will start off with about plus and minus 10 to 15 volts.