- on Computer/Software/Internet
- Published in issue 7/2008 on page 63
USB <-> RS-232 Cable
This project lets you conveniently connect any computer with USB ports directly to a simple, traditional connector — the 9-pin RS-232 (anyone remembers it?).
It converts the electrical signals from a USB<–>serial TLL convertor to the RS-232 standard. So in a nutshell, it converts a USB port into a standard but basic serial port: only the four basic signals are available.
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.
C1-C5 = 100nF 25V (SMD 1206)
IC1 = MAX3232CSE (or -ESE)
K1 = 6-way right-angled SIL pinheader
K2 = 9-way cable mount sub-D plug (male)
FTDI TTL-232R-5.0V cable, Elektor SHOP # 080213-71
Piece of large diameter heatshrink sleeving
PCB, ref. 080470-I from www.thepcbshop.com