EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: StarquestMan on September 16, 2013, 05:08:00 am
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Hi I have always loved tearing apart electronics but have never got serious about learning about it and getting all of the necessary test gear ect until recently. A while back I picked up a vintage Heathkit oscilloscope on craigslist along with a bunch of miscellaneous vintage components and parts. In the parts I got I found an assembled circuit board that I have no clue what it is used for. I have done a lot of searching on Google with the little info I know about it which is just the markings on the board but have been unable to find any more info. I saw one of Daves videos where he had a contest to have someone guess the use of a much more complicated board with success. I was wondering if anybody who knew more about electronics may be able to figure out its use many I have some sort of useful test gear hear who knows :)
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As you can see I kind of screwed up the board adding little test polls (now removed) which caused some traces to peel up. I will try to load up some more pictures.
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The board has two 555 timers and two others which I will try to find datasheets for. All of the marker writing was done by me due to the traces peeling off of the board. It has the following terminals ac input, ground, in , and holes labeled a trough g
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OK so the 16 pin dip is a hcf4013be made by SGS Thompson and the 8 pin dip is labeled sk3668. Sorry I have to keep replying like this I don't have access to a computer so I'm doing all this on my phone
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OK sorry to stretch this post out so long but I wanted to add on final picture of the back because the first one wasent very good, I'm totally new to the world of forums and posting and stuff. Any reply's would be greatly appreciated because I am really curiose to know if this is something I can use( I noticed that terminals b, c, and a are right next to each other like many they are for leads to test transistors I don't know just a wild guess) and also I don't know if It is visible in the Picts but that strange logo is an elephant head with its trunk lifted I don't know of any brands using this logo? Also there is the number 3350002 etched into the board probably a part number or something
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Pictures are too small. We want larger ones! :P
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You should reverse-engineer it and try to figure out its purpose from the schematic.
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https://www.eevblog.com/forum/beginners/how-to-reverse-engineer-a-simple-through-hole-board/ (https://www.eevblog.com/forum/beginners/how-to-reverse-engineer-a-simple-through-hole-board/)
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SGS part is a 4013 chip, a dual flip flop
http://datasheet.octopart.com/HCF4013BEY-STMicroelectronics-datasheet-10837262.pdf (http://datasheet.octopart.com/HCF4013BEY-STMicroelectronics-datasheet-10837262.pdf)
Well with the parts you have you could probably build an Atari Punk Console from it.
I found an import site that indicated the sk3668 could be a voltage comparitor, but another site showed it as a 3 pin mosfet.