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Member Since: April 1, 2010

Country: United States

  • Are these isolated or grounded to the sheath? In other words if you measure from either of the connections to the sheath will it be a high or low impedance? It seems fairly obvious it must be usable to far below zero C. Also if it is washed it is quite likely the sheathed portion could be used on food since it is stainless steel.

    This is a vey good price for a sheathed thermocouple!

  • I have found this to be the most useful of the XBee modules. The 1 mW versions just don't transfer data far enough in normal domestic scenarios, walls and what not. For those who are new to this, think of the XBee as a serial connection without the wires. These modules get you a 57600 bps connection through a couple of normal household walls. It seems expensive… until you try to do the wiring. And then you start remote programing your Arduinos (FIO recommended)… wow how convenient! The 60 mW XBee with the wire antenna is the perfect starter. Buy two (RX<->TX), download the digi "xctung" and follow the advice on the sparkfun tutorial. Its definitely hacker fun, even superfun, my advice: "just do it".

  • The data sheet shows an input capacitance (C) of 16 pF. The breakout schematic shows a 10K resistance (R) in series. R*C = 160 nS; the RC time constant. Lets call it 200 so that 5 time constants is 1 microsecond. So my, rough guess, expectation is that you should be able to get at least 500 kHz "bandwidth". My guess is that it would handle any "fast" Arduino project, for example a lightning flash sensor. Another post (Skye) indicates a 15 usec response. Still fast enough for most general light sensing. I think its time for me to get one and test it!

  • According to https://www.pjrc.com/teensy/teensy31.html the teensy 3.1 is green and it has a 12 bit analog out. The image on this page seems to be a version 3.0. All the rest of the information seems to be up to date.

  • At 5V the 51 ohm current limiting resistor this string light uses doesn't exceed it's spec. (assuming it is a 1/4 watt resistor). It drops about 3V with 59 mA of current through it. You can power the string with an old unused 5 VDC cell phone wall wart.

  • I removed the 39 ohm resistor that came with my soft white string and replaced it with two 100 ohm 1 Watt resistors in parallel (50 Ohms). I powered the string with a 9V DC adapter (just like TOL-00298) using a DC barrel jack adapter (PRT-10288). Everything stays within tolerances (nothing gets to hot or overloaded) and it made a very nice light for my wife's art deco display cabinet. Its been in use for two weeks without problems as of the time of this message being posted. Very Nice!

  • Wow! A $13 Arduino (Arduino compatible) with a built in display. Excellent!

  • Horrible... yeah, but I'm still putting 3 of them my cart just the same. The horror! The horror!

  • Good job Sparkfun! Mounting holes... it seems to be catching on. I am grateful! Keep it up. Hopefully the pro micro is next in line for holes of it's own.

  • I agree. As much as I enjoy seeing the new Arduino progress, I have been a little worried that this (Arduino Due) could affect leaflabs adversely. I have really enjoyed creating maple sketches. I appreciate the super fast math and high resolution PWM (16 bit) and analog to digital conversion (12 bit) on the maple. The leaflabs web documentation is very good. I hope things continue to progress and go well for them as well.

No public wish lists :(