Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [parallax]

13 questions
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What is a good way to learn the Parallax Propeller chip?

I am experimenting with the Parallax Propeller chip but don't have any ideas for projects to learn with. What are some good strategies on how to learn this chip? Are there any techniques or projects I should try?
samoz
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What is the difference between ISO/IEC 14443 and ISO 7816 smart cards

I am trying to build my own smart card decoder and I found that the smart card with the most popularity in terms of security and utility is the Mifare Desfire EV1 which is pretty much industrial grade. The second card I found was the Parallax…
Arnaud Dorval
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How do I learn about RFID families

I recently got a parallax RFID reader. The documentation says that it only works with the EM4100 family of RFID tags. So I tried looking it up and can’t seem to find any sort of resource explaining what different families are and what they are used…
Ziad Khayat
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1 answer

Propeller Chip with Catalina C compiler

I am working on a project using multiple MEMs sensors that communicate to a microcontroller where the data is processed before sending it serially via RF. I am using the Parallax Propeller Chip for it's ability to run multiple processes…
Jason G.
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2
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1 answer

1-Wire bus implementation in PIC18F series for Parallax ColorPAL #28380 sensors

I've bought a Parallax ColorPal 28380 color sensor, http://www.parallax.com/Portals/0/Downloads/docs/prod/sens/28380ColorPAL.pdf In the documentation above, they've used a Basic Stamp microcontroller, and I want to use this sensor with Microchip's…
JuniorDev
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Arduino with Parallax RFID reader storing variables in char

I am quite new to electronics and have been tinkering around with this Arduino UNO w/ WiFi Shield and the Parallax RFID R/W Module. Link to the RFID Module:…
user20414
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Arduino, problem with displaying RFID ID

I have recently gotten a Parallax RFID reader and I was trying to make it work with my Arduino uno. I have gotten all the necessary wires attached and I used a RFID reading program I found from Make (I will put the code at the bottom). When I open…
johnny1bucket
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Having some issues with RFID reader

I just received an RFID reader from Parallax (#28440) to play with, and am having some problems getting it to send me data. I'm interfacing it with the mbed microcontroller that I also just received. The RFID reader interfaces via RS232 (5V level),…
Dave
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Most efficient h bridge to run two DC motors in robotics application

EDIT: I was mistaken about the motors, I actually have a pair of DC motors I want to construct an h bridge that would allow me to control the servos in a boebot. However, I want to maximize the speed and torque attainable. Two wheeled servo bots are…
mugetsu
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Parallax LRF image viewer connection timed out

I am using USB to R232 Serial interface to communicate with the parallax LRF through LRF IMage Viewer software. I have installed the drivers for RS232 and have also performed the loop back test. But when i connect it to the LRF module and hit…
Manoj Krishna Mohan
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Placing an ultrasonic sensor in a corrosive environment

A year or so ago I built a simple gauge for the fuel oil tank in my basement using a MaxSonar-EZ ultrasonic distance sensor. At some point, it stopped working, and when I removed it from the tank today, I found that there's quite a bit of black ……
blalor
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Not getting data from Parallax GPS

I am trying to use a Parallax PMB-648 GPS with an Arduino Nano running this code: #include #include /* This sample code demonstrates the normal use of a TinyGPS object. It requires the use of SoftwareSerial, and…
aftrumpet
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LEDs on 3.3V serial and sd card select lines

How would i go about connecting indicator LEDs to the serial lines from my MCU(a Parallax Propeller) to a MAX3232 and the chip select line for a SD card? I want the LEDs to light up when the lines are low, as all the signals are active-low.…
Wuerfel_21
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