Member Since: April 21, 2008

Country: United States


Programming Languages

Spin and PASM for the Parallax Propeller chip. Some C for PC and AVR microcontrollers.


Robots, data logging, wireless networks



  • Product COM-12637 | about 5 months ago

    SparkFun’s ProtoBoard works well with the Propeller chip. You’ll want to use 0.1uF caps close to each of the four Vdd pins. Unfortunately SparkFun’s Propeller bob doesn’t have these bypass caps. The Propeller’s PLL circuit is very sensitive to current running through them. The Vdd pins all need to be powered at the same voltage to prevent damage. The best way to keep all the Vdd pins at the same voltage is to provide each pin with its own bypass cap.

    I’m a big fan of the Propeller myself. It makes a great controller chip for robotic projects.

  • Product SEN-11418 | about 7 months ago

    There are more to specs than pixel count. I don’t know how all the spec compare but I’m pretty sure it’s much easier to use the HackHD with a microcontroller than setting up a RPi with its camera to use as a camera. The RPi/camera combo isn’t going to be as easy to mount in a robot.

    It’s great to have another camera option but I don’t think one of the two options you mention is a clear winning for all possible applications.

  • Product SEN-11418 | about 7 months ago

    I realize I never updated this post about the video. It is NTSC.

  • Product SEN-11418 | about 7 months ago

    I’m glad you found the information helpful. I’d be inclined to use a GoPro over the HackHD unless there’s a feature of the HackHD you need/want. The HackHD does have a few advantages over the GoPro such as low light quality. I the HackHD is probably easier to interface with a microcontroller than a GoPro but I don’t think using a GoPro would be too hard (I haven’t done this yet myself). I’m pretty sure the lens of the GoPro is higher quality than the HackHD lens. The HackHD lens is easy to change.

  • Product SEN-11418 | about 8 months ago

    I haven’t made much progress. I damaged the SD socket on the camera. I tried replacing the socket with a breakout board using short wires back to the camera PCB. The camera wouldn’t work with an external SD card socket.

    I need to replace the damaged socket before I can continue the experiment. I have an extra socket on hand. I just haven’t spent the time needed to replace it.

  • Product DEV-11589 | about 8 months ago

    There is a chip sitting between the 3.3V line and ground. The chip will allow a small about of current flow. Whenever I check the resistance between Vdd and ground on most electronics boards I see a few K ohm of resistance. This is normal.

    It’s not a short, it’s a circuit.

    Did you even check to see if your board worked before returning it?

  • Product COM-08546 | about 10 months ago

    It’s nice you edited your earlier comment so it’s not in all caps, but do you still think the pinout I listed is not correct? Do you have a different pinout on your display? The pinout I listed is correct for the displays I purchased from SparkFun. Have you purchased these same displays here? Does the pinout on your display differ from what I listed?

  • Product SEN-09801 | last year

    In case anyone reads this and is still wondering. No, you can not run this at 5V. The max VDD is 3.6V NOT 6V. Many 5V devices can read 3.3V logic. If you pull the I2C lines to 3.3V the sensor will be safe and the Arduino will likely be able to read from the sensor. Make sure your Arduino is programmed before connecting the sensor, you don’t want the Arduino setting the I/O line high. The Arduino should only set the line low or as an input. If you want to play it safe use an I2C level shifter.

  • News - New Product Friday: Makin… | last year

    Hey Robert, If you want to use your new Propeller PCB to control the Mecanum robot, I’ve got code that could make it easier.

    I understand trying to use four quadrature encoders with an Arduino can be challenging.

    If you do what to use my code, let me know. I’d be glad to help with a SparkFun demo.

  • Product COM-08530 | last year

    You have to provide the electronics to drive each segment of the display. They don’t display anything on their own.

    Here’s my project as an example.

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