pic oscilloscope - Electronic Circuits Projects Diagrams Free

fugrammer · 20th November 2008, 11:08 AM

hi! i am trying to make an oscilloscope with my pic. I want to use it to measure short signals (about 0.1ms - 2ms). however. i don't know can i suppose to show it long enough. The signals could be irregular. If i set the time/div to be long, the signal would appear almost a line, if i set the time/div to be short, the signal would be too fast to be seen.

please help!

**Nigel Goodwin** · 20th November 2008, 11:39 AM

You need to syncronise it, just like a real scope - wait for the event to occur, and then record and store it.

picbits · 20th November 2008, 11:57 AM

Use the CCP on the PIC, when it triggers a CCP interrupt, output the value via the RS232 port.

The PC can do the rest of the timings etc

mister_e · 20th November 2008, 07:13 PM

I thought this one is impressive for what it do and what's under the hood...
A poorman's oscilloscope

fugrammer · 21st November 2008, 12:38 AM

thanks for the replies. however, the question that troubles me is like, how do i show a non-periodic RF signal on a oscillscope. wouldn't the time/div has to be set longer? but the signal will appear to cramp together won't it?

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20th November 2008, 11:08 AM	#1
fugrammer	pic oscilloscope hi! i am trying to make an oscilloscope with my pic. I want to use it to measure short signals (about 0.1ms - 2ms). however. i don't know can i suppose to show it long enough. The signals could be irregular. If i set the time/div to be long, the signal would appear almost a line, if i set the time/div to be short, the signal would be too fast to be seen. please help!

20th November 2008, 11:39 AM	#2
Nigel Goodwin	You need to syncronise it, just like a real scope - wait for the event to occur, and then record and store it. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

20th November 2008, 11:57 AM	#3
picbits	Use the CCP on the PIC, when it triggers a CCP interrupt, output the value via the RS232 port. The PC can do the rest of the timings etc

20th November 2008, 07:13 PM	#4
mister_e	I thought this one is impressive for what it do and what's under the hood... A poorman's oscilloscope __________________ Steve

21st November 2008, 12:38 AM	#5
fugrammer	thanks for the replies. however, the question that troubles me is like, how do i show a non-periodic RF signal on a oscillscope. wouldn't the time/div has to be set longer? but the signal will appear to cramp together won't it?