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nsayer

Member Since: June 3, 2013

Country: United States

  • Product DEV-09716 | last week

    In principle, you could, if you had an ATTiny85 with a bootloader that used software serial. But a bootloader would seriously cut into the flash space of an attiny. I don’t think anyone seriously uses other than AVR programming for them.

  • News - Enginursday: Introducing … | about 3 weeks ago

    I don’t know if it’s of any interest, but I designed a thing I call LCDuino as a response to the same issues. It’s what you get when you mash an Uno and an AdaFruit RGB backlit 2 line LCD shield together and cram them into an 80x36 mm space.

  • Product CAB-11304 | about 3 months ago

    I concur. The plug, as is, is just like a standard 9 pin male DTE serial port that you used to find on a PC - including the nuts.

  • Product LCD-10862 | about 4 months ago

    I’ve worked a lot with 2x16 RGB LCD displays. There are a bunch of ways to use them in the Arduino space:

    1. Use the LiquidCrystal library. This takes more than half the pins of an ATMega and most of the pins of an ATTiny84. You can, however, share the four data pins with other devices that have chip select logic so that only one device masters or reads from those pins at once (that is, make it into a real data bus). I usually share 3 of the 4 with the ISP/SPI pins. As long as the LCD’s E pin is not asserted during programming (which would be unlikely), it works fine.
    2. Use the AdaFruit RGB LCD shield and the LiquidTWI2 library.
    3. Use an i2c “backpack” and LiquidTWI2. The quintessential example of this is available from the OpenEVSE store, but that’s not the only version. Essentially you wire an MCP23017 up to the LCD the same way as the AdaFruit shield and bring the i2c and power out to a 4 pin SIP connector, all on an 80x36 mm board that fits exactly onto the back of the LCD module.

    LiquidTWI2 is particularly nice because it not only supports the 5 button inputs, just like the AdaFruit shield, but also supports using the last unassigned pin on the MCP23017 to drive a piezo speaker to make beeps. I’ve designed a backpack that includes the piezo. You can find it on my OSH Park profile.

    One thing to beware of is that there are four different variations on the 2x16 char RGB LCD - positive or negative (aka transmissive or transflective) text; and common cathode or common anode backlighting. There’s no wiring difference between transmissive or transflective, but for common cathode or common anode, you need to connect pin 15 either to +5 or ground and invert the sense of the RGB backlight control lines. LiquidTWI2 includes an initialization constant that lets you “hint” it that the backlight is inverted, but for most backpack/shields you would need to rework the board to change the connection on pin 15.

    It would be somewhat nicer if the makers of RGB shields and backpacks would include a two-way solder jumper to allow the buyer/assembler to select the polarity of the common pin more easily. Of course, it would also be somewhat nicer if everyone would pick an LED type and stick with it, but whatcha gonna do?

  • Product BOB-11818 | about 4 months ago

    Is this the same connector used on the EM 406A module?

  • Product SEN-00251 | about 4 months ago

    Actually, no, because the glass braid insulation would melt before then (900 ºF).

  • Product WIG-00081 | about 5 months ago

    Anyone looking to make a toaster reflow oven might want to check out my Toast-R-Reflow project. It consists of a dual optoisolator + triac power board that you install in the oven. The optoisolator inputs are connected to a cable that comes out to a controller board that also has a thermocouple amplifier on it. The whole thing is run by an ATTiny85. http://nsayer.blogspot.com/2013/11/toast-r-reflow-how-to-summary.html

  • Product DEV-11590 | about 7 months ago

    What modifications would one make to a garment’s care instructions when modifying it to include stuff like this?

    In other words, if you take a T-shirt, and then sew one of these sets into it to add a twinkling light effect to whatever the T shirt design is, then what would the care instructions tag be?

    I’m guessing:

    Remove battery before washing. Machine wash warm, gentle cycle, air-dry - do not tumble, do not dry clean ?

  • Product COM-00209 | about 7 months ago

    It should be possible to modify boards.txt to add an entry for this chip over ISP, shouldn’t it? Something like this: http://blog.lincomatic.com/?p=10

  • Product GPS-10710 | about 9 months ago

    I’d like to second this.

No public wish lists :(