- #How multiplexer can be used as parallel to serial converter how to#
- #How multiplexer can be used as parallel to serial converter software#
- #How multiplexer can be used as parallel to serial converter Pc#
- #How multiplexer can be used as parallel to serial converter plus#
Voltage is, I think, the least of the conversion issues.
These have been available for a long time from Patton (sells nationwide but one of my favorites because they are nearby), B & B and Black Box - all of which still list parallel/serial converters on their web sites.
#How multiplexer can be used as parallel to serial converter plus#
Plus end-to-end serial has big advantages over parallel - 200 feet without any problem at all. Plus there are situations (e.g., 6 terminals plus 2 printers all connected serial to an 8-port statistical multiplexer over a modem connection back to the host) where this is just simply not an option. With PC-compatibles this is trivial, but with other machines not always so easy. In more recent years I think they even had a network card that used the same interface slot, though I never bothered with that myself. There were (still are!) plenty of options: Add a port to the printerįor example, Okidata Microline printers would typically come standard with a parallel port but you could add a serial port card (I probably still have one around here somewhere). But there aren't so many printers these days with serial or parallel ports now that 100M (or even 1G) network ports for printers are dirt cheap, so we'll call it Retro. But ports for PCs are still available and as noted below, the companies I dealt with years ago for converters still sell them. Almost all the printers I use today (and most people I know) are connected USB or networked. You will find it much easier to develop this protocol in software, rather than having to add even more chips to a complex digital control circuit.This is only barely Retrocomputing.
#How multiplexer can be used as parallel to serial converter Pc#
You will be sending 12 readings to the PC continuously and it needs to know which one is which, so your transmission protocol must include more than just the raw data. You could make such a circuit using separate analog MUX, ADC and UART (with a few logic gates to 'glue' them together) or just use a small microcontroller which has all these features built in.Īn MCU might seem more complex because it needs software, but the hardware can be much simpler. To create the serial signal you need an ADC (Analog to Digital Converter) to convert the analog voltages into digital numbers, and a UART (Universal Asynchronous Receiver Transmitter) to serialize the data bits with the correct baud rate and format. The output is still analog, not suitable for transmitting via RS232 (which is a +-12V digital signal). The voltage signals and transmit them to the computer's com portĪn analog multiplexer is just the electronic equivalent a multi-pole rotary switch - it simply steers one of the inputs to the output. My understanding is that an analog multiplexer can be used to combine Ultimately, I am looking for the simplest way to transmit multiple analog signals through a single COM port on a PC. Is this possible without using a microcontroller chip? If not, what chip should I use to perform this task? I am trying to avoid using a microprocessor in the interest of keeping things as simple as possible. My understanding is that an analog multiplexer can be used to combine the voltage signals and transmit them to the computer's com port through a voltage converter/serial interface like the MAX232. For now I am just trying to understand the hardware aspect of transferring 12 analog signals through a single COM port.
#How multiplexer can be used as parallel to serial converter software#
Other software will be developed to read which LEDs have been triggered and if they are operating within a specified voltage range. The LEDs are triggered by relays that are controlled with software from the same computer that I will use to monitor the LEDs. The analog data is a simple voltage reading from 12 different LEDs.
#How multiplexer can be used as parallel to serial converter how to#
I am having trouble understanding how to design a circuit that will transmit multiple analog data signals to a computer through one RS232 COM port.
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