Author Topic: check of circuit diagram  (Read 1197 times)

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Offline glinjikTopic starter

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check of circuit diagram
« on: January 21, 2020, 12:49:40 pm »
hi i am thinking of building this for fun and expand my knowledge of smps but i think i found a error I've highlighted the problem cap i think it should be an x2 cap probably 275v 0.47uF but unless im reading this wrong 1kv 0.47n unless its a big disk cap the nearest i have is 1.6k 4n7 but kv seems a bit on the huge side ?
All the truth in the world adds up to one big lie (Bob Dylan)
 

Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #1 on: January 21, 2020, 03:53:42 pm »
ok think I've sussed it out myself 1kv is the part code 1.4n is the value its the blue type disc caps bit confusing on the diagram live and learn 
All the truth in the world adds up to one big lie (Bob Dylan)
 

Offline Vovk_Z

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Re: check of circuit diagram
« Reply #2 on: January 21, 2020, 04:12:19 pm »
No, not X2. I think there isn't errror. It's snubber circuit, rated voltage is 1 kV or more, 4700 pF capacity.
You can check youself at some FSDM311 related application notes.
« Last Edit: January 21, 2020, 04:15:23 pm by Vovk_Z »
 
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Online Gyro

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Re: check of circuit diagram
« Reply #3 on: January 21, 2020, 04:30:06 pm »
ok think I've sussed it out myself 1kv is the part code 1.4n is the value its the blue type disc caps bit confusing on the diagram live and learn

The 104 code is 100nF, not 1.4nF (it stands for 10 followed by 4 zeros pF).

For 4n7 you want a code of 472 (47 and 2 zeros pF).
Best Regards, Chris
 
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Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #4 on: January 21, 2020, 07:12:33 pm »
another question at L1 10uhn is this supposed to be 10uh?
All the truth in the world adds up to one big lie (Bob Dylan)
 

Online Gyro

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Re: check of circuit diagram
« Reply #5 on: January 21, 2020, 07:28:20 pm »
It looks like it, Henry is upper-case by the way... 10uH.
Best Regards, Chris
 
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Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #6 on: January 22, 2020, 04:29:52 am »
thank you i WilL tRy tO RemembEr tO uSe caSes CoRectLy  :-DD
All the truth in the world adds up to one big lie (Bob Dylan)
 

Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #7 on: January 22, 2020, 11:16:18 am »
Hi can someone tell me if I've got this filter correct not the values just the wiring
All the truth in the world adds up to one big lie (Bob Dylan)
 

Offline Vovk_Z

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Re: check of circuit diagram
« Reply #8 on: January 22, 2020, 11:50:21 am »
No, it is not correct. And I don't see a reason to design your own filter (they are not a secret now, but I'm not sure how it is in Russian Federation now).
« Last Edit: January 22, 2020, 11:52:56 am by Vovk_Z »
 

Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #9 on: January 22, 2020, 12:21:39 pm »
i won't answer that smart comment, this is an electrical forum not a place for cheap political digs
All the truth in the world adds up to one big lie (Bob Dylan)
 

Offline glinjikTopic starter

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Re: check of circuit diagram
« Reply #10 on: January 22, 2020, 05:55:46 pm »
Well i decided to add a choke to the circuit after a bit of reading i came up with this i plugged it in for the first time and no bang put the fluke across the bridge rectifier 116vdc scary stuff a transformer at 12v is one thing this is new territory i hope the choke is correct it's the same choke and caps that were feeding the transformer in the pc ATX so no need to calculate the choke or caps is that cheating a bit?
All the truth in the world adds up to one big lie (Bob Dylan)
 


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