8-Channel PC Controlled Relay Board 8-Channel PC Controlled Relay Board
This PC printer (parallel) port relay board provides independently programmable real-time control for each of the eight onboard mains rated relays... Electronics > Circuit Components > Printed Circuit Boards > Development Boards 3074KT 3074KT View Offer Quasar Electronics Limited
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8-Channel PC Controlled Relay Board

AS3074KT - 8-Channel PC Controlled Relay Board

This product is obsolete/discontinued and no further stocks are available. Please see alternatives in the category links above.

Ability Level 3: IntermediatePre-Assembled and Kit versions available

This PC printer (parallel) port relay board provides independently programmable real-time control for each of the eight onboard relays.

Relay outputs can be used to automatically turn On/Off lights, motors & other devices around the home, office, laboratory or factory. The software interface is compatible with Windows 7 (32-bit)/Vista/XP/ME/2000/NT/9x and allows you to program and save an infinite number of On/Off sequences. Alternatively, you can write your own software with a DLL from logix4u (see EPE Magazine Tutorial for more details).

NB If this board is powered up and connected to the computer, all of the relays will momentarily turn on when the PC first boots up. If this is a problem, please look at our 8-Channel Serial Port Isolated IO Relay Controller instead.

  • Can be used with any PC parallel port on a 286 upward (remember those?)
  • Each channel has a relay output
  • LED relay status indicator for each relay
  • For a BOXED version of the project see Order Code 3165
PowerRegulated 12Vdc (Order Code 660.446UK is suitable)
Current Consumption300mA max (40mA standby plus ~30mA per active relay)
Outputs8 x SPDT Relays
Maximum Output
Load (Resistive)
Up to 48Vac or 28Vdc @ 5 Amps max. per relay (Relay Datasheet)
Output ConnectionsNO, NC, C (Relay FAQ)
Computer InterfaceParallel port
Dimensions70 x 200 x 25 mm
ConnectionsPower: 5.5 x 2.5mm DC socket
Relays: Screw terminal blocks
Computer: Male DB25 connector
Product FormatSELF-ASSEMBLY Electronic Kit (KT) or
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
DocumentationUser Manual
DOS Batch File Help Manual
SoftwareWindows Software Interface

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