hello,

i am looking for instrument to measure speed of dyanamo?
function test if the speed is low are high & when it is normal operating should send a signal to plc.

Thanks & Regards
Afroz

 

hi,
You could use a number of device options for picking off the RPM, eg: opto or hall effect etc..
Amplify the rpm signal to a TTL level and use say PORTB.0 of the PIC to count the pulses over a given period.
Output the rpm to LCD or RS232 port.
E

 

Does the "dynamo" produce a DC output relative to its RPM?

Please explain what type of "dynamo" it is, as that could just be a language translation of any number of devices.