Tagged Questions

3
votes
2answers
197 views

Serial Port (DB9) signals

Just about every time I use a serial port for anything, I only use 3 pins of the usual 9-pin connector (DB9): Tx, Rx, and GND. And when I wire up my microcontroller projects to these ports, I just ...
0
votes
1answer
125 views

GPRS modem gets struck/hangs up when “AT” is entered

I started working on a U-blox LEON-G100 gprs modem connected to the PC terminal through UART. Whatever character I enter into the terminal gets echoed back except "AT". When I enter "AT", the modem ...
-4
votes
1answer
202 views

How to interface a digital scale strain gauge weight sensor with a microcontroller [closed]

It is a Load Sensor(SEN-1638) Which can be used to Measure upto 110 Pounds So,How To Interface the above sensor to a Microcontroller Component?
4
votes
2answers
223 views

Crystal radio as user interface problem

If I built a coil like the one in this crystal set. How could I use a micro to detect which point the alligator clip is on? Basically I wan't to use the crystal set as a user interface for an audio ...
8
votes
3answers
598 views

What is this type of digits-only LCD called?

I've seen this type of LCD many times in weigh scales, calculators, gauges, micrometers, etc. I know it's a fairly traditional display but I really like its compactness, simplicity, and maybe it even ...
0
votes
0answers
76 views

How to make cards for POS? [closed]

My project is one similar to an automated dispensing system, and I want to use custom made cards which can be written to (by the PC) and read (by the machine). However I don't even know what this card ...
6
votes
4answers
2k views

Accessories for Android devices with USB host

The Android Accessory SDK relies on the accessory having USB host. However, my understanding is that newer versions of Android (3.1, 2.4?) have USB host support in the kernel. And I know many ...
2
votes
1answer
326 views

Intefacing a PIC Mircocontroller (PIC16F84A) to two stepper motors

I am a neewbie here so don't cush me yet but I have a question concering stepper motors and Microcontrollers (more specificaly PIC16F84A). Does anyone know how to Inteface these two devices? Steppers ...