History of USB2LPT

Evaluation system	USB2LPT – Evaluation system September 2004, Quantity: 1 AN2131SC - Full Speed Handmade PCB (included in Diploma work of Eik Arnold) 99% compatible to “Original Version” and “Revision 1”, only pull-up resistors are missing A handy utility for troubleshooting is the LPT checker Do not clone! Errors on PCB!
The “Original”	USB2LPT Release 1.0 February 2005, Quantity: 10 AN2131SC - Full Speed Handmade PCB (two-sided), manual via, hand-soldering Dongle housing, USB-B receptacle, 25 pin SubD receptacle Wire for extra 5V supply included Recommended to clone (small changes necessary) Attention: AN2131SC is about to be discontinued.
First Revision	USB2LPT Release 1.1 April 2005, Quantity: 18 AN2131SC - Full Speed 100% compatible to “Original Version” Industrial PCB (two-sided, 350 µm), hand-soldering Plug housing, USB-MiniB receptacle, 25 pin SubD receptacle Do not clone! Cumbersome! Errors on PCB!
Second Revision	USB2LPT Release 1.2 — called USB2LPT2 too August 2005, Quantity: 33 CY7C68013A-56PVXC (FX2LP) - High Speed (not firmware-compatible to predecessor, other chip) Industrial PCB (two-sided, 250 µm), hand-soldering Plug housing, blue High-Speed LED, USB-MiniB receptacle, 25 pin SubD receptacle Cloning OK, but maybe you will await next revision
Third Revision	USB2LPT Release 1.3 June 2006, Quantity: 132 CY7C68013A-56LFXC (FX2LP) - High Speed (firmware-compatible to predecessor with new firmware, other wiring) Industrial PCB (two-sided, 150 µm), reflow soldering Plug housing, blue High-Speed LED, USB-MiniB receptacle, 25 pin SubD receptacle Professional clones recommended
Fourth Revision	USB2LPT Release 1.4 April 2007, Quantity: 101 Very similar to revision 1.3 above Three extra lines for using as 20-pin I/O device Professional clones recommended
Low-Speed Revision	USB2LPT Release 1.5 2007, Quantity: 11 ATmega8 or ATmega48: ultra cheap. Idea from IgorUsbPlug. Fast as Full-Speed. Firmware implementation using USBDRV by Objective Development Same Windows driver, slightly modified .INF file (already done and available) PCB only, very easy to populate Cloning recommended – useful where low-speed is sufficient
Another Low-Speed Revision	USB2LPT Release 1.6 2008, Quantity: 750 Crystal removed! Thanks to continued work of Objective Development Integrated bootloader for firmware update via USB Same as Release 1.5 but 2 diodes instead of voltage regulator when 3.3V operation of ATmega controller is needed for some application PCB, very easy to populate, and devices Cloning recommended – useful where low-speed is sufficient
High-Speed again	USB2LPT Release 1.7 2008, Quantity: 750 Functionally equal to Release 1.4 Changed voltage regulator to conform the USB idle-mode power consumption Professional clones recommended
Centronics adaptor	Centronics adaptor 2007, Quantity: 0 For all USB2LPT revisions, to connect to a 36-pin Centronics receptacle Source (Eagle PCB)