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selljamhere

Member Since 28 Mar 2012
Offline Last Active Dec 10 2013 06:38 AM
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Topics I've Started

Visual Studio Prof. 2010

10 September 2012 - 01:54 AM

I recently got a new Windows box. It runs Windows 7 x64 with VS 2010. I installed .NET Micro Framework SDK v4.1 and Netduino SDK v4.1.0 (64-bit), per the Netduino Downloads instructions. However, Visual Studios only lists "Class Library", "Console Application", Device Emulator", and "Window Application" under the Micro Framework template. Has anyone else had this problem? Is it possible to manually add the Netduino Plus Application template?

Sound Sensor

29 July 2012 - 10:43 PM

I'm trying to build a sound sensor that measures volume. I found one online with a pretty good schematic: ZX-Sound. I also found a video of a homemade sensor using this schematic found here. The schematic is fairly complicated, and, to be honest, I don't know enough about op-amps to understand the reasons behind all the resistors and capacitors.

I have, however, built the circuit myself, but it only outputs a constant reading, no matter what volume is present in the room. One possible reason I can think of is that the mic I used isn't identical. It's from Radio Shack, and has a schematic on the back to differentiate the voltage and signal lines (mic datasheet is attached). I don't know how to incorporate this mic into the ZX-Sound schematic.

Has anyone had experience with a similar project, or electret mic's? I would appreciate any insight.

Continuous Rotation Servo

15 April 2012 - 06:23 AM

Hey all,

I just bought a continuous rotation servo from sparkfun, but I'm having trouble controlling it.

Here's my test code:
using System.Net;
using System.Net.Sockets;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.NetduinoPlus;
using Servo_API;

namespace ServoTesting
{
    public class Program
    {
        public static void Main()
        {
            // write your code here
            PWM servo = new PWM(Pins.GPIO_PIN_D5);

            servo.SetDutyCycle(0);

            servo.SetPulse(20000, 19000);

            Thread.Sleep(1000);

            servo.SetDutyCycle(0);

            Thread.Sleep(1000);
            
            servo.SetPulse(20000, 11000);

            Thread.Sleep(1000);

            servo.SetDutyCycle(0);
        }

    }
}

At this point, I can only get it to rotate clockwise, and I can't figure out how to adjust the rotational velocity or change direction. in the PWM.setPulse(uint period, uint duration) method, I've tried changing both the period and duration values, but the servo's behavior changes somewhat erratically.

According to the servo's datasheet: "When analog signal inputs, servo chooses orientation according to impulse width. When intermediate value of impulse width is above 1.5ms, servo is clockwise rotation, conversely, anti-clockwise." I assume that the impulse is the durration, but in the above code, the servo rotates clockwise both times.

Thanks in advance,

selljamhere

RGB Led Trouble

28 March 2012 - 07:34 PM

Hi All, I recently ordered an RGB led for some tinkering, but the led I received doesn't match the description (IE the FW current and voltage values don't match). I tried setting up a simple circuit using PWM to test the individual colors, but the led doesn't shine at all. The led has the following properties: FW current: 30mA (green/blue), 50mA (red) FW Voltage: 3.5 - 4V (green/blue), 2-2.6V (red) The voltage requirement for the green and blue leds bothers me most. The Netduino Plus output is 3.3V, .2V lower than the required voltage. Is it possible to use this led without a transistor? Or should I find another one in suitable ranges for the Netduino?

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