Re: Trouble shooting digtal I/O

In article , Remove_this_bishan2 says... | | etc. Logic analyzer can only take 5V TTL signals. so I cant use it (also | too expensive!) | Appreciate any suggestions | | |

You could easily build a level shifting interface, then use a logic analyser!

I assume you have a PC? Why not build a level converter, which would then allow you to feed the outputs into the d0 to d7 pins of the parallel port and grab 8 bits. Two ports would allow 16 bits. The maximum you could use is three ports.

All you need then is a simple bit of (B)basic programming to read the port(s) and display the data ether as ones and zeros or graphically.

ParaPort gives an example of what can be done from:-

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Harry Bloomfield
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