oren

Member Since: April 19, 2008

Country: United States

Profile

Bio

I’m an electrical engineering student at Caltech. I’m interested in embedded system design, digital signal processing, radar and remote sensing systems, communication systems, and aerospace instrumentation systems. I’m a private pilot and hope to build an airplane or two someday. I’m also a bit of a mechanical watch and clock buff.

Role

Student

Organizations

Caltech, IEEE, AOPA

Spoken Languages

English, Hebrew

Programming Languages

C/C++, Java, various assembly languages, VHDL, Matlab

Universities

California Institute of Technology

Expertise

Embedded systems, digital signal processing, radar and remote sensing systems

Interests

Flying, sailing, scuba diving, horology

  • News - Team Space IL and the X P… | about 3 years ago

    This is not true at all. The rovers have always relayed their data to/from an orbiting satellite (Mars Odyssey, Mars Reconnaissance Orbiter) which then relay the data back to the Deep Space Network on Earth. The high gain antennas on these satellites are larger than the rovers themselves.

  • News - B-Squares | about 3 years ago

    This bears a striking resemblance to Siftables.
    Don’t expect too much from that solar cell…

  • News - Snow Plowing with Robotic… | about 3 years ago

    Very cool. But ARGH… Amps are not units of power! *&%$&#!!!

  • Product GPS-00465 | about 4 years ago

    Are you sure you’re treating your data correctly? I originally thought I was having a similar issue until I realized that it gives coordinates in degrees and minutes (with the decimal in the minutes number) rather than degrees and decimal degrees. This information is in the NMEA spec.
    Plotting the coordinates on google maps gave me a location about 8 miles from my real location, but correcting the format gave me my actual location to within 10 ft.

  • Product PRT-09541 | about 4 years ago

    I don’t know why this is being marketed as a solar cell. It’s not… It’s a photodiode.

  • News - Nuclear Fusion | about 5 years ago

    The voltage divider most likely wouldn’t have worked anyway. You typically build voltage dividers with larger resistors so that you don’t draw too much current. This is fine if you just need to change the range of a voltage that you’re sampling, say with an ADC, since the ADC input is usually a FET that doesn’t really draw any current.
    But the whole point of a battery is to have a SMALL series resistance so that you can use it as a power supply, i.e. the voltage stays relatively stable no matter how much current you draw from it. Adding a voltage divider to a battery changes the series resistance from a few ohms to several kilohms (R1 || R2). This means that the voltage will quickly drop to near zero whenever you draw a non-negligible current from the divider tap.
    You could use smaller resistors so that the voltage drop is smaller, but then your divider will be taking a battery voltage to ground through a small resistance, and your battery will be depleted even faster.

  • News - Open Source Hardware List | about 5 years ago

    It’s extremely arduino biased. I honestly can’t figure out why people have been making such a big deal about the arduino… you’re paying $40 for a $4 microcontroller with a power supply and a built in programming cable.
    Dev boards make sense for something like an FPGA or an ARM, where the only packages available are surface mount or BGA… It’s really annoying to have to lay out a board or deal with complicated / expensive soldering techniques if all you want to do is play with the chip.
    But AVRs are so stupidly easy to use… AND they’re available in DIP packages. You can just stick one in a breadboard and have it talking to the computer in less than two minutes!

  • Product LCD-08335 | about 5 years ago

    I’ll probably just end up soldering the backlight cable directly to my board since the connector is so hard to find.
    Important note to anyone thinking of using this LCD though:
    You need 28 volts at 20 milliamp to power the backlight. Don’t just connect it to your standard 5V supply… you’re going to need a boost converter.
    To sparkfun: You guys went to the trouble of making the LCD test board in the picture… why don’t you sell it?

  • Product LCD-08335 | about 5 years ago

    Any references for the LED backlight connector? I can’t seem to find it anywhere…

  • Product LCD-08355 | about 5 years ago

    Is there a footprint for this part somewhere? I’m lazy…

No public wish lists :(