stevenvh17

Member Since: January 22, 2015

Country: Belgium

  • That’s a pretty steep price for a general-purpose transistor (even when it has good specs). At least I would expect a discount for quantities. At www.conrad.com I pay 0.08 euros (about 0.07 dollar) for one, 0.06 euros (about 0.05 dollar) @100.

  • Just shows how embarrassingly poor the whole Arduino range of boards is designed. The Uno is absolutely no match for the Teensy performance-wise, yet costs more, and other Arduino ARM boards cost a multiple of the Teensy. I fail to see how Arduino became so popular.

  • The dissipation in a logic IC like a microcontroller is mostly resistive, that means that power is quadratic with voltage. 2/3 the voltage is 4/9 the power. So, yes, moving from 5V to 3.3V is more than a 50% power reduction.

  • Perhaps time to replace this by a breakout board for the Sensirion SHTC1? The SHTC1 costs only 1/10th the price of the SHT15!! Granted, you’ll need a 1.8V regulator on the BoB, plus level shifters (2 MOSFETs), but the total cost will still be a fraction of the current board. USB 42 is simply too expensive, even for the excellent specs of the SHT15. BTW, the SHTC1 has comparable specs.

  • You add add a capacitor on the breadboarding area. But debouncing in software is free! Zero additional components required.

  • Or maybe not… :-(

  • The Adafruit PCB has been discontinued.

  • Placing these in series for 5V operation, as suggested in the description, should be done with care. The datasheet mentions -20%/+80% tolerance. Worst case this would mean one capacitor would get 3.5V (!) and the other 1.5V. Not a good idea. The differences will probably not that big, especially when you have two capacitors from the same production batch, but note that any difference in capacitance will cause a higher than 2.5V on one of the capacitors.

  • I’ve seen this comment for another Arduino product as well. I guess Arduino is to blame, not SFE. Yes, Arduino is sloppy is almost every aspect of their business.

  • For those who are interested in PIC32, check out Digilent’s ChipKIT: mechanically Arduino-compatible, based on PIC32, and the same price as an Arduino Uno.

    http://www.digilentinc.com/chipkit/