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Search: Posts Made By: bianchi77
Forum: Custom Tweaks, Modifications, and Revisions 04-25-2018, 07:33 PM
Replies: 10
Views: 635
Posted By bianchi77
Re: Schematic and software?

Thanks for that, how about datasheet from CB6905 ?
Forum: Custom Tweaks, Modifications, and Revisions 04-24-2018, 10:55 PM
Replies: 10
Views: 635
Posted By bianchi77
Re: Schematic and software?

I can't find its datasheet, can you ?
Forum: Custom Tweaks, Modifications, and Revisions 04-24-2018, 10:51 PM
Replies: 10
Views: 635
Posted By bianchi77
Re: Schematic and software?

Good enjoy it :)
Share with me, how does it work ?
Forum: Custom Tweaks, Modifications, and Revisions 04-23-2018, 08:56 PM
Replies: 10
Views: 635
Posted By bianchi77
Re: Schematic and software?

Are you sure I don't need a software ? What chip is it ?
The datasheet will tell more..
Forum: Custom Tweaks, Modifications, and Revisions 04-23-2018, 04:57 AM
Replies: 10
Views: 635
Posted By bianchi77
Re: Schematic and software?

There is no software on it?
Forum: Custom Tweaks, Modifications, and Revisions 04-22-2018, 05:02 PM
Replies: 10
Views: 635
Posted By bianchi77
Question Schematic and software?

Dear Members,

Does anybody know the schematic and software for this board?

http://s.aliexpress.com/vYfIzEnq?fromSns=Gmail

Thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 04-04-2018, 02:16 AM
Replies: 1
Views: 153
Posted By bianchi77
Re: A component code questions ??

Anyone knows for BD8657 ? thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 04-04-2018, 02:15 AM
Replies: 2
Views: 166
Posted By bianchi77
Re: A schematic for this power supply ?

Don't worry about it I got it fixed, thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 04-02-2018, 07:45 PM
Replies: 1
Views: 153
Posted By bianchi77
A component code questions ??

Dear Badcaps Members,

I tried to find the component for this power supply modules,
It's taken from Samsung TV,

Does anyone know ?
Thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 04-02-2018, 07:36 PM
Replies: 2
Views: 166
Posted By bianchi77
A schematic for this power supply ?

Dear Badcaps Members,

Does anyone know the schematic of this PCB ?
I got burn on R17, replaced it, but still the voltage can not be adjusted ?
Can it be a problem of LM741 ?

Thanks
Forum: MSI/Microstar 06-27-2017, 01:38 AM
Replies: 18
Views: 2,418
Posted By bianchi77
Re: MSI G45M BIOS question ?

I can not continue POST,
It can display message on VGA
TAB to see POST and DEL for setup,
but no response when I pressed keyboard, either USB or PS2 keyboard,
What do you reckon failure here ?...
Forum: Troubleshooting Power Supplies and Power Supply Design 01-06-2017, 11:38 PM
Replies: 6
Views: 657
Posted By bianchi77
Re: Transmitting power wirelessly ?

any simple breadboard schematic examples ?
Forum: Troubleshooting Power Supplies and Power Supply Design 01-06-2017, 01:11 AM
Replies: 6
Views: 657
Posted By bianchi77
Transmitting power wirelessly ?

Everyone,

Is there any way on transmitting the power I have boosted into another device wirelessly ?
Resonance transmitter and receiver ?
Any examples ?

thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 01-02-2017, 04:52 PM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

One question : does f pole equal to f switch ?
Forum: Troubleshooting Power Supplies and Power Supply Design 01-02-2017, 04:45 PM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

I know that and I hate that headache, because it's good for learning and understanding but not earning at all..
Had you done any opto and TL431 before ?
Forum: Troubleshooting Power Supplies and Power Supply Design 01-02-2017, 04:44 PM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

It will relate with control system loop with feedback, bode plot ,pole, zero, aha so that's the way it works, return again to the math :)
Forum: General Electronics Technical Discussion 12-31-2016, 03:45 AM
Replies: 3
Views: 408
Posted By bianchi77
Forum: General Electronics Technical Discussion 12-31-2016, 12:39 AM
Replies: 3
Views: 408
Posted By bianchi77
What's the value of this link resistor ?

Everyone,

What's the value of this link resistor ?
I tried to meter it about 1 ohm,

but could it be 10 mOhm ?

Thanks
Forum: Troubleshooting Power Supplies and Power Supply Design 12-31-2016, 12:34 AM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

I got 207V , RL = 2K and f = 13.14 KHz, it's less efficient but it does the job..
and abit noisy with low frequency
Forum: Troubleshooting Power Supplies and Power Supply Design 12-30-2016, 11:54 PM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

Okay, I only want to know how that coupler and TL431 work, is that the right circuit ? more or less ?
Forum: Troubleshooting Power Supplies and Power Supply Design 12-30-2016, 01:32 AM
Replies: 136
Views: 8,359
Posted By bianchi77
Forum: Troubleshooting Power Supplies and Power Supply Design 12-30-2016, 01:13 AM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

@budm, thanks for the book
Forum: Troubleshooting Power Supplies and Power Supply Design 12-30-2016, 01:11 AM
Replies: 136
Views: 8,359
Posted By bianchi77
Re: DC boost converter max power ?

How can I add TL 431 and optocoupler for feedback?
Inspiration :
http://u.dianyuan.com/bbs/u/68/2457951218099004.gif

but not sure if it's the right way modifying my voltage divider..
Forum: General Electronics Technical Discussion 12-28-2016, 10:00 PM
Replies: 3
Views: 450
Posted By bianchi77
Re: What device is it ?

@budm
anyway I've made MC34063 running on 3Kohm RL and 220V but it's not stable..
could it be the inductor too small ? my test is using 333 coilcraft smd inductor 33uH...
it's releasing heat too...
Forum: General Electronics Technical Discussion 12-28-2016, 09:52 PM
Replies: 3
Views: 450
Posted By bianchi77
Re: What device is it ?

ferrite bead core, ok, thanks, similar like on power supply charger bead...
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