Author Topic: What's this please? (Component Advice)  (Read 355603 times)

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alm

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Re: What's this please? (Component Advice)
« Reply #125 on: February 03, 2012, 08:01:08 am »
My first guess would be opto-coupler, too. These are usually easy to recognize because the circuit around it is usually isolated (no copper going from one side of the opto to the other). I wouldn't discard the regulator option either. That, and the MOSFET, is about all the 'ICs' you would expect in a cheap SMPS. Probably no active PFC at this power level. I guess the power supply could have an EEPROM to prevent you from using third-party power supplies, but a dead EEPROM shouldn't prevent the power supply from working.
 

Offline requim

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Re: What's this please? (Component Advice)
« Reply #126 on: February 03, 2012, 09:28:23 am »
I assume if I posted some high resolution photos of both sides of the PCB one of you may be able to deduce the type of IC? (ie MOSFET or Optocoupler)

I'll see if I can figure it out based on the description by amspire, but some validation might be nice.

edit:  Here are the photos:
« Last Edit: February 03, 2012, 10:07:59 am by requim »
 

Offline requim

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Re: What's this please? (Component Advice)
« Reply #127 on: February 03, 2012, 10:08:31 am »
And the last photo:
 

alm

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Re: What's this please? (Component Advice)
« Reply #128 on: February 03, 2012, 12:51:12 pm »
Someone actually providing useful, sharp pictures when requested, that's a welcome change ;). Looks like I was wrong about it not having active PFC, but this component is not involved in that circuit.

My guess is that it's indeed a MOSFET, probably responsible for generating the pulses for the standby circuit (small transformer). Most of the pins appear to be connected together, and it's on the primary side. Definitely no opto, these are in DIP-4 packages placed across the isolation barrier (thick white line on bottom silkscreen).
 

Offline amspire

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Re: What's this please? (Component Advice)
« Reply #129 on: February 04, 2012, 12:25:59 am »
With the white paint, it is hard to see how the pins are connected on the bottom of the 8 pin chip. If 4 are shorted together on one side, and three on the other side with one pin that is on its own, then it looks like a mosfet.  The 4 shorted pins will be the drain, the 3 shorted pins the source, and the single pin the gate.

Definitely not an optocoupler - all the 4 pin chips are the optocouplers.

Richard
 

Offline Short Circuit

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Re: What's this please? (Component Advice)
« Reply #130 on: February 04, 2012, 04:23:57 am »
My guess it's a single-chip regulator for the standby power supply (together with the small transformer).
 

Offline requim

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Re: What's this please? (Component Advice)
« Reply #131 on: February 04, 2012, 05:20:18 am »
I ohmed out the leads on the chips and found the following.  The top 4 pins are all independent.  The 3 on the bottom left are all tied together and the one on the bottom right is independent.  I'll try to post a photo later indicating where the pins connect to.
 

Offline siliconmix

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Re: What's this please? (Component Advice)
« Reply #132 on: February 06, 2012, 06:47:35 am »
anyone got an idea what these are for ?
 

Offline Jad.z

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Re: What's this please? (Component Advice)
« Reply #133 on: February 06, 2012, 07:11:06 am »
Hi siliconmix  :)

I think this are fiber optic cables with ST-style connectors.
They are used to connect gadgets to fiber optic network (Duplex style maybe).
They go into something like this

 

Offline siliconmix

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Re: What's this please? (Component Advice)
« Reply #134 on: February 06, 2012, 07:41:53 am »
thank you jad.i bought them mixed lot in an auction didn't have a clue what they where for .are they expensive ?
 

Offline Jad.z

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Re: What's this please? (Component Advice)
« Reply #135 on: February 06, 2012, 08:23:20 am »
You can search digi-key for "CABLE ASSEM FIBER ST-ST".
That should give you an idea about their cost.
 

Offline NeTSuRfEr

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Re: What's this please? (Component Advice)
« Reply #136 on: February 06, 2012, 01:24:24 pm »
Hello Guys i have this 3 components in the TO-220 package that i can’t find and don’t know what they are for so i can’t find equivalent parts maybe there is someone that can help me with this.
I will right down the numbers and letters in the parts in the order that they appear here it goes…

This one I know that is the brand “International Rectifier”

9732
IR 250k
31 49

Next One

014
M27AB
31045

Last One

ON
7446
CQ236
AKA

They all are in the TO-220 package

Hope there is some one that can help me with this.

Kind Regards
 

Offline Majorstrain

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Re: What's this please? (Component Advice)
« Reply #137 on: February 14, 2012, 05:43:32 pm »
Can anyone identify this Analog Devices chip.  It is possibly a regulator or amplifier.
I've had no joy searching the data sheets.
Cheers,
Phil
 

Offline amspire

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Re: What's this please? (Component Advice)
« Reply #138 on: February 14, 2012, 05:54:22 pm »
http://www.analog.com/static/imported-files/data_sheets/ADP3333.pdf

It is a low drop-out 3.15V 300mA regulator. The exact part number is ADP3333ARMZ-3.15R7
 

Offline Majorstrain

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Re: What's this please? (Component Advice)
« Reply #139 on: February 14, 2012, 10:11:07 pm »
Cheers Amspire,
Many thanks.
 

Offline jasonh

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Re: What's this please? (Component Advice)
« Reply #140 on: February 20, 2012, 08:14:33 pm »
This is kind of a reverse 'whats this' question.  More like a what is.

   I am looking for a toggle switch like an on-off or on-off-on that can be reset electronically.

   E.g. if left in an on position it can be reset remotely so it would have some internal mechanism to flip the switch.  It may be something I have to devise myself but not sure at this stage.

   Anyone come across something like it?

Thanks,
JAson
 

Offline steve_w

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Re: What's this please? (Component Advice)
« Reply #141 on: February 20, 2012, 08:34:14 pm »
I have seen these types of switch in military avionics when I was in the airforce.  I couldn't hazard a guess at what one would cost (think thousands). You might be able to knock something up with relays? consider using a bistable relay?
So long and thanks for all the fish
 

Offline jasonh

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Re: What's this please? (Component Advice)
« Reply #142 on: February 20, 2012, 09:04:41 pm »
I do have the feeling that if I found them available for purchase I would be thinking of making them myself :)   I am just worried about the size of something I could do vs something that is manufactured. 

    There could be a few side by side.    It is a 'very' nice to have rather than mandatory but I would like to get it going, depending on the cost of course!
 

Offline amspire

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Re: What's this please? (Component Advice)
« Reply #143 on: February 20, 2012, 11:16:48 pm »
There are things like breakers with a shunt trip coil that allows the breaker to be turned off with a signal through the coil.

Breakers come in all sizes, so I would guess there are some small, switch-like breakers with the shunt trip feature. RCD (Earth leakage protection breakers) are shunt trip breakers with the extra current leakage detector that trips the shunt coil.

Not sure how you find very small ones though. The industry calls the large devices that can fit on a DIN rail "Miniature circuit breakers", so I hate to think what they would call something much smaller.

Richard.

« Last Edit: February 20, 2012, 11:28:10 pm by amspire »
 

Offline SeanB

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Re: What's this please? (Component Advice)
« Reply #144 on: February 25, 2012, 05:50:42 pm »
You want a momentary action switch and a bistable relay with 2 coils. One coil is powered by the switch, and the other coil is pulsed to switch the relay off. The contacts of the relay then are used as you need.
 

Offline Randall W. Lott

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Re: What's this please? (Component Advice)
« Reply #145 on: February 28, 2012, 06:49:01 pm »


What the hell is this?  It's about the size of a flash drive.

I think the logo is "Harris".

The bottom side of the PCB is not populated.  It has text in copper that reads:
1989 15-100001 C
CM1


My guess is that it's some sort of ID tag with a code stored on this mystery IC.  It was my father's, but he passed away so I can't ask him.
- Randy
 

Offline G7PSK

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Re: What's this please? (Component Advice)
« Reply #146 on: March 05, 2012, 05:42:30 am »
I found this Diode in a load of parts that I purchased many years ago it is some form of Diode but I cannot find any data on it.
The legend reads. CV7038 KB/SB
 

Offline SeanB

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Re: What's this please? (Component Advice)
« Reply #147 on: March 05, 2012, 06:50:45 am »
Point contact diode, germanium. Normally used as a signal diode. This is a GTE replacement part, but I no longer have a GTE catalogue. I would guess 30PIV at 10mA, common for most of the germanium diodes.

Google suggests it is a stud rectifier of around 400mA at 200PIV, but in this case i think it is wrong.

5961-99-037-2038   5961990372038   990372038   3005-20330 300520330 B32461 B32461 CV7038 CV7038 CV7038/GJ3M CV7038GJ3M GJ3M GJ3M K1007-CV7038 K1007CV7038 N84253A1 N84253A1

 

Offline Rufus

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Re: What's this please? (Component Advice)
« Reply #148 on: March 05, 2012, 07:08:00 am »
Point contact diode, germanium. Normally used as a signal diode. This is a GTE replacement part, but I no longer have a GTE catalogue. I would guess 30PIV at 10mA, common for most of the germanium diodes.

I doubt 10mA point contact diodes were packaged in something with threaded studs for terminals.

I see CV7038 described as rectifier with GJ3M given as a substitute. I also found a 1972 catalogue page listing GJ3M as a 200v 400mA (800mA when heatsinked) germanium junction stud mounted half wave rectifier. 
 

Offline SeanB

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Re: What's this please? (Component Advice)
« Reply #149 on: March 06, 2012, 02:53:26 am »
Part number is not consistent with the picture in post. Thus i went on the signal diode route, most likely a Ge one ( age) and most of these were rated for a pretty low voltage and low current. Some were used as multipliers, and some had an impressive ( for the time) frequency range and power output.

I still have a collection of Ge PNP transistors, they have come in handy at times.
 


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