Electronic Voting Machine is not working

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This topic has 2 replies, 3 voices, and was last updated 11 years, 5 months ago by umar farrok.

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September 29, 2013 at 4:28 am #2671

Subhra Saurav Pattnaik
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I have already tried the EVM project given in this site with the schematic & code using p89v51rd2 controller but P1-P4 switches dont work…. Reply me fast.

September 30, 2013 at 4:40 am #10490

AJISH ALFRED
Participant

Hi,

Try using external pull down resistors with the switches S1, S2, S3 and S4.

September 30, 2013 at 12:30 pm #10496

umar farrok
Participant

there may be a voltage lag or corresponding voltages not reached to the pins check that when pressing switch logic high is passing in that corresponding line
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