A MAX232 level shifter

I have built a level shifter...:

• http://www.amateurfunkbasteln.de/rs232level_shifter/rs232level_shifter.html

Some more information on similar projects:

• http://www.compsys1.com/workbench/On_top_of_the_Bench/Max233_Adapter/max233_adapter.html
• http://www.digisolutions.de/c5umbau/pegelwandler.html
• http://www.digisolutions.de/schaltungen/RS232_DL2RCG.pdf
• http://www.digisolutions.de/c5umbau/pictures/Pegelwandler.png

ATTENTION: The building of the little device is finished. Important: The pumping of the level shifter consumes a lot of energy, so it is definitely necessary to provide 3.3 V. There are MAX232 chips which work with 5V. They are not suited for this kind of project even if they are cheaper (1 Euro). The 3.3V version chip (MAX3232) costs about 5 Euro. Make sure you buy the 3.3V variant!! Thanks to Thomas Schäfer who gave this hint!

Credits: Michael Wöste, dl1dmw at qsl.net, who has provided the PCB for a very reasonable and fair price.

The level shifter was meant to allow me to flash my WRTSL54GS. See how the [Connections between the MAX232 Level Shifter and the WRTSL54GS|level shifter is connected to the WRTSL54GS]]

BTW, here's an interesting alternative:

• http://www.lefinnois.net/wpen/index.php/2007/04/07/

And I found that people sell these devices readily built at Ebay:

• http://stores.ebay.de/Electronic-Boards-and-Systems respectively, ask here: http://www.rss-systems.de/