RS232 to Centronics adapter

hippy

hippy

Ex-Staff (retired)
The FRM015 seems to be all you need to convert serial to centronix line printer. The FRM015 seems to use a T2400 baud rate so if it were being used with RS232 ( such as comes out of a PC COM port ) all that would be required is a MAX232 to be added.
 
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Pekari

Senior Member
hippy said:
The FRM015 seems to be all you need to convert serial to centronix line printer. The FRM015 seems to use a T2400 baud rate so if it were being used with RS232 ( such as comes out of a PC COM port ) all that would be required is a MAX232 to be added.
Click to expand...
You don't mean this: http://www.powerbox.se/products/pdf/FRM015.pdf Can't found anything else FRM015.

I can't found circuit anywhere. I found this: http://www.lookrs232.com/rs232/level_converters.htm but to centronics... How?

I foud this: http://airborn.com.au/serial/sertopar.html but it is done with Atmega microcontroller.
 
hippy

hippy

Ex-Staff (retired)
It's also the first link you provided in your first post so I had presumed you were aware of what FRM015 was.

What are you actually trying to do ? Connect a PICAXE to a line printer port, connect a PC to a line printer port or something else ?
 
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Pekari

Senior Member
hippy said:
It's also the first link you provided in your first post so I had presumed you were aware of what FRM015 was.

What are you actually trying to do ? Connect a PICAXE to a line printer port, connect a PC to a line printer port or something else ?
Click to expand...
I need to connect PC serial port to printer centronics port.
 
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moxhamj

New Member
This brings back memories. It was the very first computer kit I ever built, back in 1984. RS232 to Centronics was the simplest way to get a computer with serial ports to flash a led.

In a strange sort of way, I may have a need for this again. I've standardised a lot of boards on serial ports with proper RS232 signal levels, and sometimes you just want to flash a led.

If the data only ever went out, maybe you could simplify hippy's schematic in post #7 even further and use a 22k/10k network on a pin and do a serin with the polarity reversed. Saves a max232.

And pondering further, what is the smallest/cheapest picaxe that could do 8 data out lines and a strobe. Is it a 14M with a few pins reconfigured so there are enough output pins?
 
hippy

hippy

Ex-Staff (retired)
The 20X2 would probably be most appropriate as that can run Txxxx ( post MAX232 ) or Nxxx ( 22K/10K ) with background receive, has plenty of outputs and high speed to shift data around.

The choice is FRM015 or DIY a PICAXE solution. Where time is money the FRM015 is a ready-built, tested solution and documented. For anyone who isn't familiar with either protocols or circular buffering it's probably a lot more complex to go the pure PICAXE route.
 
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