Hacked Gadgets Forum

September 22, 2009

USB to RS232 Adapter Hack

at 4:14 am. Filed under Electronic Hacks


Openschemes shows us how those $10 USB to RS232 adapters can be hacked to provide us a valuable tool. Nice thing about soldering some wires to a few test points on a finished circuit is that the circuit can be put away for use in the future. That never happens to a circuit that was built on a bread board since it will probably be ripped out to make room for another circuit before the original one is needed.

"The most desirable type of adapter uses at least two chips: a USB controller chip such as a microcontroller and a level translator chip such as a MAX232. Other types can be hacked but they will probably need you to dump the firmware, rewrite it, and reprogram the device. That’s fun and all, but for now we’re just looking for a simple and CHEAP way to get a low-voltage USB serial port."


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8 Responses to “USB to RS232 Adapter Hack”

  1. Joe Says:

    Most pointless post ever.

  2. The voice in your head Says:

    So what does it do?

  3. ChalkBored Says:

    it allows you to use a 3.3v serial device on an adapter made for a 12v one by intercepting the signal before the voltage is stepped up.

  4. Steve Says:

    Is it really that difficult to throw a FTDI on some etched copper clad? Then you can also add a useful connector rather than soldering wires to fine pins and hoping it doesn’t go bang when you try it.

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