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Erik Malund
11/14/13 11:41
Read: 879 times
Mt Airy, Nc
USA


 
#190136 - if i translate correctly
Responding to: Jai Nair's previous message
the problem is 2051 chip pin out put is cathode which is connected to gate..
and if i connect the cathode of scr with negative power supply, it dose not work.
i've found that if chip output is anode then it works prperly..


the problem is 2051 chip pin out put is pulldown which is connected to gate..
and if i connect the cathode of scr with negative power supply, it dose not work.
i've found that if chip output is pullup then it works prperly..

Maybe you can get by with pullup resistors.

I would never have thought of using SCRs for a display, but why not. You will still need transistors for the other row/column, so why not transistors on both sides. There is no way you can turn it of if both sides are SCRs.

Erik



List of 9 messages in thread
TopicAuthorDate
bt169      Jai Nair      11/11/13 12:25      
   What does the data say ?      Jim Granville      11/11/13 12:41      
   Have you even read the datasheet?      Richard Erlacher      11/12/13 00:43      
      bt169      Jai Nair      11/12/13 07:55      
         To what purpose?      Andy Neil      11/12/13 12:12      
            What are you expecting it to do?       Jai Nair      11/14/13 10:03      
               if i translate correctly      Erik Malund      11/14/13 11:41      
               Post the schematic!      Andy Neil      11/14/13 12:23      
         Don't you think a BJT or MOSFET would work?      Richard Erlacher      11/14/13 11:33      

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