Port Serial
How can i control 8 relays with a serial port ?
I want to control 8 relays with the serial port.
You would need a Serial to Parallel Converter, or some kind of microntroller-controlled device that would accept serial information and convert it to 8-bit parallel. you also need high voltage or high drive current capabilities to handle relays.
By entering "serial to parallel converter kit" into BING, I found almost 2 MILLION entries, and there are several of what you seem to need in the first 25 entries!
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 Intel RS25DB080 8 port SAS RAID Controller Serial ATA 600 SAS PCI Express x8 $744.66 Time Remaining: 1h 11m Buy It Now for only: $744.66 |
 DIGI NEO 1P50000857 01 2 PORT DB9M D SUB PCI ADAPTER Card SERIAL $6.99 Time Remaining: 8h 12m Buy It Now for only: $9.99 |
 Digi Passport 48 Port Integrated Console Server 48 x RJ 45 Serial LAN 2 x RJ 45 $4,211.06 Time Remaining: 1d 14h 15m Buy It Now for only: $4,211.06 |
 + Adaptec 2610SA 6 Port Serial ATA SATA RAID PCI X Controller Card AAR 2610SA $19.99 Time Remaining: 1d 17h 44m |
 HP 4 PORT QSCLP 100 SERIAL PORT CARD 577687 001 $75.00 Time Remaining: 1d 18h 4m Buy It Now for only: $75.00 |
 RS232 to TCP IP Ethernet Modem lan WAN port Serial Device Converter Server $79.99 Time Remaining: 2d 2h 6m Buy It Now for only: $79.99 |
 LOT OF 2 Super SATA 733 Server Serial ATA Server 4 port Backplanes $25.99 Time Remaining: 2d 6h 54m Buy It Now for only: $25.99 |
 SUN 530 3100 DB9 TO RJ45 SERIAL PORT ADAPTER $25.00 Time Remaining: 2d 9h 20m Buy It Now for only: $25.00 |
 Intel RS25DB080 8 port SAS RAID Controller Serial ATA 600 SAS PCI Express x8 $696.52 Time Remaining: 2d 15h 8m Buy It Now for only: $766.27 |
 StarTech NETRS2321E 1 Port RS 232 422 485 Serial over IP Ethernet Device Server $109.04 Time Remaining: 2d 16h 28m Buy It Now for only: $120.83 |
 StarTech NETRS2321E 1 Port RS 232 422 485 Serial over IP Ethernet Device Server $110.99 Time Remaining: 2d 22h 58m Buy It Now for only: $122.99 |
 NEW StarTechcom 2 Port PCI RS232 Serial Adapter Card w $32.24 Time Remaining: 3d 4h 24m Buy It Now for only: $32.24 |
 NEW Startech 4 Port Professional USB to Serial Adapter $68.33 Time Remaining: 3d 12h 39m Buy It Now for only: $68.33 |
 12 Port 3ware AMCC 9650SE 12ML Serial ATA RAID Controller $475.00 Time Remaining: 3d 15h 17m Buy It Now for only: $475.00 |
 Adaptec 2241000 R 1430SA 4 Port Serial ATA RAID Controller $107.16 Time Remaining: 3d 20h 55m Buy It Now for only: $107.16 |
 Cisco WIC 1T 1 Port Serial Card 1700 2600 3600 $9.99 Time Remaining: 4d 4h 24m Buy It Now for only: $14.99 |
 NEW SIIG 1 Port RS 232 422 485 Ethernet to Serial Devic $74.24 Time Remaining: 4d 7h Buy It Now for only: $74.24 |
 2244100 R 5805 8 Port Serial ATA SAS RAID Controller $689.27 Time Remaining: 4d 8h 50m Buy It Now for only: $689.27 |
 + 3Ware Escalade 4 Port SATA Serial ATA RAID Controller Card 8506 4LP $7.99 Time Remaining: 4d 13h 45m |
 Sonnet Tempo X eSATA 8 Port Serial ATA PCI X 3 GB Host Controller $179.99 Time Remaining: 4d 14h 26m Buy It Now for only: $179.99 |
 HP AF102A 48 PORT SERIAL CONSOLE $2,750.00 Time Remaining: 4d 19h 2m Buy It Now for only: $2,750.00 |
 IBM 37L1426 Multi Serial Port Adapter Netfinity 5000 $75.00 Time Remaining: 4d 21h 3m Buy It Now for only: $75.00 |
 NEW Digi AccelePort Xp 8 Port Multiport Serial Adapter $554.88 Time Remaining: 5d 12h 28m Buy It Now for only: $554.88 |
 NEW BB SSPXP 100 1 Port Serial Adapter $96.99 Time Remaining: 5d 14h 30m Buy It Now for only: $96.99 |
 IBM RS6000 OEM 93H6540 Eight Port Serial Card $44.00 Time Remaining: 6d 10h 56m Buy It Now for only: $44.00 |
 HP A6748 60001 8 Port Serial Mux Adapter $175.00 Time Remaining: 6d 14h 19m Buy It Now for only: $175.00 |
 HP A6749 60101 64 Port Serial Mux Adapter $297.50 Time Remaining: 6d 14h 19m Buy It Now for only: $297.50 |
 Adaptec Dell AAR 2610SA 64MB Serial SATA RAID Controller Card 6 Ports w cabling $33.99 Time Remaining: 6d 19h 23m Buy It Now for only: $33.99 |
 IBM RS6000 93H6540 Eight Port Serial Card $59.95 Time Remaining: 6d 22h 6m Buy It Now for only: $59.95 |
 ADDONICS 4 PORT EXTERNAL SERIAL ATA II RAID CONTROLLER $74.71 Time Remaining: 7d 10h 51m Buy It Now for only: $74.71 |
 Adaptec 58300 8 port SAS Serial Attached SCSI Host $100.00 Time Remaining: 7d 12h 13m Buy It Now for only: $100.00 |
 COMPAQ 283984 001 264535 000 Second Serial Port ConnBD $19.95 Time Remaining: 7d 20h 50m Buy It Now for only: $19.95 |
 UDS2100 2 Port Device Server 2 x DB 9 Serial 1 x RJ 45 10 100Base TX 10Mbps $227.21 Time Remaining: 8d 4h 47m Buy It Now for only: $227.21 |
 NEW SIIG CyberSerial JJ P45012 S7 4 port PCI Serial Ada $56.24 Time Remaining: 8d 10h 58m Buy It Now for only: $56.24 |
 NEW Digi Edgeport 8r 8 Port RS 232 Serial Adapter $351.98 Time Remaining: 8d 13h 55m Buy It Now for only: $351.98 |
 NEW Quatech DSLP PCIE 100 2 Port Multiport Serial Adapt $58.99 Time Remaining: 8d 13h 55m Buy It Now for only: $58.99 |
 NEW SYBA Multimedia 2 port Serial Adapter 2 x 9 pin D $14.24 Time Remaining: 8d 13h 56m Buy It Now for only: $14.24 |
 Digi Passport 48 Port Dual AC Power Integrated Console Server 48 x RJ 45 Serial $4,802.04 Time Remaining: 9d 2h 23m Buy It Now for only: $4,802.04 |
 ASI Datamyte 4 Port PCI RS 232 RS 422 16450 Serial Card $24.95 Time Remaining: 9d 20h 56m Buy It Now for only: $24.95 |
 COMPAQ 6 PORT SERIAL CARD KIT for UPS battery backup units 192185 B21 $12.00 Time Remaining: 9d 21h 47m Buy It Now for only: $12.00 |
 IBM Netfinity 8 Port RJ11 Serial Controller I O Adapter FRU 01N0834 $75.00 Time Remaining: 10d 50m Buy It Now for only: $75.00 |
 NEW StarTechcom 2 Port PCI Express RS232 Serial Adapte $45.22 Time Remaining: 10d 9h 33m Buy It Now for only: $45.22 |
 NEW SIIG 4 port PCI Serial Adapter JJ P04511 S1 $35.24 Time Remaining: 10d 9h 33m Buy It Now for only: $35.24 |
 NEW SIIG 4 Port USB to RS 232 Serial Adapter Hub 1 x $56.24 Time Remaining: 10d 9h 33m Buy It Now for only: $56.24 |
 NEW StarTechcom 2 Port RS232 PCI Express Serial Card w $45.24 Time Remaining: 10d 9h 33m Buy It Now for only: $45.24 |
 Dell UX656 SIIG JJ P45012 S6 Four Serial 16550 Ports $49.99 Time Remaining: 11d 3h 25m Buy It Now for only: $49.99 |
 9650SE 2LP SGL 3WARE 2 PORT SERIAL ATA RAID CONTROLLER $185.83 Time Remaining: 11d 10h 29m Buy It Now for only: $185.83 |
 3Ware AMCC 9650SE 12 16ML PCI Express Multi Port Serial ATA SATA RAID Controller $113.17 Time Remaining: 11d 11h 38m Buy It Now for only: $113.17 |
 NEW Comtrol RocketPort 8 Port USB Serial Hub III $335.06 Time Remaining: 11d 13h 17m Buy It Now for only: $335.06 |
 NEW StarTechcom 1 Port PCI Express Serial Adapter Card $32.83 Time Remaining: 11d 16h 9m Buy It Now for only: $32.83 |
 372952 001 HP Serial ATA SATA 6 port PCI RAID controller $124.00 Time Remaining: 11d 16h 31m Buy It Now for only: $124.00 |
 372953 B21 HP Serial ATA SATA 6 port PCI RAID controller $124.00 Time Remaining: 11d 16h 31m Buy It Now for only: $124.00 |
 377597 001 HP Serial ATA SATA 6 port PCI RAID controller $124.00 Time Remaining: 11d 16h 31m Buy It Now for only: $124.00 |
 EDS4100 4 Port Device Server with PoE 4 x DB 9 Serial 1 x RJ 45 10 100Base TX $460.66 Time Remaining: 11d 20h 54m Buy It Now for only: $460.66 |
 EDS8PR 8 Port Device Server 8 x RJ 45 Serial 1 x RJ 45 10 100Base TX 10Mbps $674.63 Time Remaining: 11d 20h 54m Buy It Now for only: $674.63 |
 SIIG CyberSerial 4 port PCI Serial Adapter JJ P45012 S7 $58.88 Time Remaining: 12d 1h 42m Buy It Now for only: $58.88 |
 NEW StarTechcom 2 Port CardBus RS232 Serial Laptop PC $48.24 Time Remaining: 12d 12h 14m Buy It Now for only: $48.24 |
 3ware Escalade 8506 4LP 4 Port Serial ATA RAID Controller Card Only $69.00 Time Remaining: 12d 16h 8m Buy It Now for only: $69.00 |
 NEW Comtrol RocketPort USB Serial Hub II 4 Port 98295 1 $172.98 Time Remaining: 12d 18h 53m Buy It Now for only: $172.98 |
 Startechcom NETRS2321E StarTechcom 1 Port RS 232 422 485 Serial over IP Et $112.15 Time Remaining: 12d 19h 49m Buy It Now for only: $112.15 |
 Digi International DC SP 01 S Connect SP Serial Server 1 Port $170.97 Time Remaining: 13d 5h 41m Buy It Now for only: $170.97 |
 3Ware 9650SE 4LPML 4 Port PCI Express to Serial ATA II Hardware RAID Controller $279.00 Time Remaining: 13d 12h 16m Buy It Now for only: $279.00 |
 NEW StarTechcom 1 Port ISA RS232 Serial Adapter Card w $18.24 Time Remaining: 13d 13h 22m Buy It Now for only: $18.24 |
 SIIG 4 port Multiport Serial Adapter ID E40011 S1 $185.88 Time Remaining: 13d 16h 27m Buy It Now for only: $185.88 |
 NEW Siig 2 port PCI Serial Adapter LP P2P021 S6 $22.99 Time Remaining: 13d 16h 31m Buy It Now for only: $22.99 |
 STARTECHCOM 1 PORT CARDBUS SERIAL CARD CB1S485 $92.29 Time Remaining: 13d 23h 34m Buy It Now for only: $92.29 |
 ADAPTEC 2 PORT SERIAL ATA RAID CONTROLLER 2255900 R $50.88 Time Remaining: 14d 47m Buy It Now for only: $50.88 |
 NEW StarTechcom 1 Port RS232 Serial over IP Ethernet D $121.99 Time Remaining: 14d 10h 16m Buy It Now for only: $121.99 |
 NEW SIIG 1 port Serial PC Card JJ PCM012 S3 $47.20 Time Remaining: 14d 10h 51m Buy It Now for only: $47.20 |
 StarTech 1Port FTDI USB to Serial Adapter Data Transfer Cable ICUSB2321FIS $84.88 Time Remaining: 14d 11h 39m Buy It Now for only: $84.88 |
 NEW SUN 530 3100 DB9 TO RJ45 SERIAL PORT ADAPTER $24.95 Time Remaining: 14d 16h 14m Buy It Now for only: $24.95 |
 NEW ADAPTEC 2244100 R Adaptec 5805 8 Port Serial ATA SA $555.19 Time Remaining: 14d 18h 1m Buy It Now for only: $555.19 |
 Cisco 800 01838 05 4 Port SERIAL PORT PA 4T+ $35.00 Time Remaining: 15d 9h 41m Buy It Now for only: $35.00 |
 Cisco 800 02314 02 SERIAL NET MOD 4 PORT CNI9CGCAAA $35.00 Time Remaining: 15d 10h 22m Buy It Now for only: $35.00 |
 NEW Bixolon IFA S TYPE 1 port Serial Adapter $11.24 Time Remaining: 15d 11h 13m Buy It Now for only: $11.24 |
 Supermicro AOC USASLP S8I 8 Port Serial ATA SAS RAID Controller $179.99 Time Remaining: 15d 17h Buy It Now for only: $179.99 |