PARALLEL PORT HOW TO
PARALLEL PORT SERIAL
PARALLEL PORT SOFTWARE
PARALLEL PORT PC

This is still the most common type of port, especially on desktop systems. These ports are often called 'unidirectional' and are most commonly found on desktop bus cards (also called IO expansion cards, serial/parallel cards, or even 2S+P cards) and older laptops. The port can do 8 bit byte output and 4 bit nibble input. Different LPT Ports: SPP, EPP & ECP and their specifications 4 bit ports The diagram below shows all three LPT ports along with their supported speed and description:įigure 3. Examining the different type of LPT Portsīefore we begin analyzing the pin outs of the LPT port, let's have a look at the different type of LPT ports available. and all LPT ports use DB-25 female connectors. When looking at an LPT port, it is impossible to identify whether the port is a SPP, EPP or ECP type because all three types visually look the same. With older computers, you will always find the LPT port right above the two COM ports and it's usually color coded purple. Physical LPT port on a computer motherboard The picture below shows a parallel port, also known as LPT port, on a computer:įigure 2. What does the parallel port (LPT) look like?

PARALLEL PORT SERIAL

Serial ports are capable of transferring one data block per time, therefore unable to match speeds of parallel ports. This diagram shows data transfer via parallel ports and we can see multiple data blocks being simultaneously transferred from one host to another, increasing significantly the overall throughput. This is clearly shown and explained in the diagram below:įigure 1. To better understand why parallel links are much faster than serial links, we’ll need to analyze the way data is transferred.

PARALLEL PORT HOW TO

Users interested in transferring files using parallel direct cables can visit the following Microsoft support page which explains How to Install and Configure the Direct Cable Connection Feature ( ).Īs we’ll see further below, there are three different type of LPT ports, SPP, EPP and ECP, each supporting different speeds and features, but all use the same direct cable connection.Ī standard LPT port will provide speeds of 40 Kb/s to 60Kb/s while the faster ECP ports will deliver up to 1.1 Mb/sec or 8.8 Mbps. We'll also take a look at physical LPT ports, LPT modes ( SPP, EPP, ECP), LPT port Pintouts, LPT direct connection cable and more. The cable required is slightly more complicated as it has more wires that need to be connected, but the transfer speeds achieved make it well worth the time and effort required to make the cable. Relay has Normally Open and Normally Closed Contacts rated for voltages 12VDC 10A, 125VAC 10A, or 250VAC 5Amps.The Parallel Direct Connection is the second solution covering the transfer of data from one computer to another.This kit is also available as a fully assembled and tested circuit. The kit is a boon to the Science Fair project, laboratory experimenter and so on.

PARALLEL PORT SOFTWARE

We provide two sets of complete, stand-alone software to control the relays: one works under DOS so you can write your own batch files to control individual relays, the other under Windows 9x/2000/ME/XP. Each relay has an LED to indicate when it is operated.

There are 8 relays each capable of switching 12VDC/10A or 240VAC/5A. Simply connect printer cable from your computer to the connector on relay board. Communicate with the real world via the parallel printer port on your PC.

PARALLEL PORT PC

Do you have an old PC lying around the house which absolutely no one wants? Then you can convert it into a dedicated controller. Parallel Port Relay Board Kit – CK1601 – Kit

Parallel port