I know that I have not been on this forum for a very long time life has gotten in the way
This for the people on this forum when I spend lot time on here
I have have not done any Basic Stamp projects for a very long time
I now work for a metal supply company as all round maintenance person which means that I work on just about anything and every thing
from overhead crane to plasma cutting bed table CNC machine to a CNC drilling/ plasma machine to computer stack controller band saws
to a blever machine
I also do some outside consulting work repairing CNC servo controller power supply modules and other switching power supply and motor indexer controller
Sometimes I can become very busy at times
Right now I am working on a motor indexer controller which is giving me a big headache
About a year or so ago it would not remember where it was and could not find home and so on
It has a battery back up memory which the battery went bad and had very bad case of bad capacitor ides
change the memory chip and capacitors that had a very high ESR value reading compared to a new cap of same UF value
After this repair it work great for a little over a year then I get a call that it blew apart very small value cap (104) and blew the fuse for the power supply for the servo motor I did some checking and found out all the high power mosfets are being turned at the same time ( it has FW/REV directions) now if you take out the four (optic/mosfet ic chip) the short is gone but as soon as you put two of the (optic/mosfet ic chip) back you have the short again now the (optic/mosfet ic chip) is controlled by another chip that is controlled by the micro controller
The problem is that the only place I can find this chip is from China which will take about a month to get here unless I want pay a lot of money for faster shipping
One note this indexer is from the 1970’s or 1980’s and is no longer made and the company that makes it was bought out by another company which does not really support it anymore parts are very hard to find ( ic chips )
This is just one of the problem project that I have going on right now
That all folks for now
I have have not done any Basic Stamp projects for a very long time
I now work for a metal supply company as all round maintenance person which means that I work on just about anything and every thing
from overhead crane to plasma cutting bed table CNC machine to a CNC drilling/ plasma machine to computer stack controller band saws
to a blever machine
I also do some outside consulting work repairing CNC servo controller power supply modules and other switching power supply and motor indexer controller
Sometimes I can become very busy at times
Right now I am working on a motor indexer controller which is giving me a big headache
About a year or so ago it would not remember where it was and could not find home and so on
It has a battery back up memory which the battery went bad and had very bad case of bad capacitor ides
change the memory chip and capacitors that had a very high ESR value reading compared to a new cap of same UF value
After this repair it work great for a little over a year then I get a call that it blew apart very small value cap (104) and blew the fuse for the power supply for the servo motor I did some checking and found out all the high power mosfets are being turned at the same time ( it has FW/REV directions) now if you take out the four (optic/mosfet ic chip) the short is gone but as soon as you put two of the (optic/mosfet ic chip) back you have the short again now the (optic/mosfet ic chip) is controlled by another chip that is controlled by the micro controller
The problem is that the only place I can find this chip is from China which will take about a month to get here unless I want pay a lot of money for faster shipping
One note this indexer is from the 1970’s or 1980’s and is no longer made and the company that makes it was bought out by another company which does not really support it anymore parts are very hard to find ( ic chips )
This is just one of the problem project that I have going on right now
That all folks for now
Comments
We all get busy at times. It's always nice to come back here to the forum and be among friends!
The chip that controls the optic sensors I need pull that chip out and power it up again and see if the 100 watt light bulb in place of the fuse is still very bright or what or no light at all
That sounds like a good idea
Remember I am using a 100 watt light bulb instead of a fuse
Do you have a link to where I can do a cross over replacement ( a good site )
I have decided to order the IC chips that the optic sensors are being told to turn on from
Here is a photo of the chips I bought
Those are programmable Logic, so will not do anything until you get code into them.
Do you have the code ? Do you have a programmer ?
Can you work out what Logic might be inside them - do you have any known-good ones ?
What makes me think this might be the problem it has all the optic sensors are turn on at the same power level and it if you look at the data sheet it shows that the power supply is from - voltage that turns it off and a + voltage turn it on
The optic sensors that it has ( HP then the part number )
Here is the data sheet for the optic sensors
https://www.promelec.ru/pdf/HCPL-3120-J312_HCNW3120.pdf
Do you have a programmer to do this
WinPLACE was what the ICT software was called, not sure where you download that these days...**
That software compiles boolean equations to JED file, which then goes into the PEEL18CV8.
You might get lucky, and be able to use ATF16V8, which is still an active part, and software is
https://www.microchip.com/design-centers/programmable-logic/spld-cpld/tools/software/wincupl
The 18CV8 is a little smarter than a 16V8, so not all designs can fit, but most decode-logic stuff can.
** addit : google finds some chatter and links here http://www.vcfed.org/forum/archive/index.php/t-40469.html
I had to reverse engineer the in-circuit programming and map but it saved me being dependent upon a $10,000 programmer and PC software!
Now back to the OP, as has been said, the chips are no good to you unless they are programmed, or you have the source/jed file and can program them. But I somehow doubt they are faulty. However as a generic test for any semiconductor component I use the diode test setting on the meter. Get any chip, perhaps a Prop and try it from Vss (ground) to and you will notice that similar pins such as I/O will read much the same. Then reverse the polarity of the probes and check again, they should all be much the same. You can even repeat this procedure from Vdd/Vcc (logic supply) as well. Most chips are damaged from ESD and this test shows up these faults quickly and easily.
I should try your diode test on a supposedly bad BS2.
Can I do this with any meter such as the Harbor Freight freebies?