The last of the Dual RS232 Serial Plus boards are on clearance for $20 + $5 priority mail shipping. The boards are highest quality, silk screened and double sided solder-masked.
Unique staggered design allowing installation with or without modem.
Dual independent RS-232 serial ports allowing com1 and/or com2 operation
Stereo Left/Right/Gnd buffered audio output
4 +5/GND power sources-
2 pairs of 2mm power headers @ CN4
1 pair of .100” power headers @ CN6
1 pair of onboard thru-holes sized for .025” header posts (user installed)
TTL level com2 signals available on-board: TCTS,TCD,TTX,TRX,TDTR,TRI,
Unused com1 modem lines available for future expansion: SPKR,RING,MIC,RST
This board is available in two basic versions: with and without the MAX235CPG RS-232 driver chips. Boards delivered with these chips are ready to run upon installation. Boards delivered without these chips must have one of these chips installed for each operational serial port. FREE samples of these chips may be obtained by simply making a request to one of the two sources included with the board. These chips may also be purchased directly from www.BadFlash.com at a competitive price. An inexpensive cable package for this board is available from www.BadFlash.com
Technical questions may be directed to email@example.com