SparkFun Forums 

Where electronics enthusiasts find answers.

Search found 1054 matches

 Go to advanced search

Re: LED Project Guidance

 by n1ist ¦  Thu May 09, 2019 11:30 am ¦  Forum: Projects ¦  Topic: LED Project Guidance ¦  Replies: 16 ¦  Views: 319

Do you have multiple directories with a tlc_config.h? You may be editing the wrong one.

Re: Arduino UNO to SAMD 21 MINI Breakout Board

 by n1ist ¦  Thu May 09, 2019 11:29 am ¦  Forum: SAMD ¦  Topic: Arduino UNO to SAMD 21 MINI Breakout Board ¦  Replies: 8 ¦  Views: 77

That button is an SPST button with two pins tied together on each end. You treat it as a 2-pin device (I'd tie one side to ground, the other to the SAMD21 with a pullup resistor).
/mike

Re: Qwiic mp3 correct wiring to arduino uno?

 by n1ist ¦  Thu May 09, 2019 11:26 am ¦  Forum: Sound Boards & Audio ¦  Topic: Qwiic mp3 correct wiring to arduino uno? ¦  Replies: 10 ¦  Views: 119

I'm wondering if the qwiic mp3 board is drawing too much current from the 3.3v rail. The Arduino's regulator is rated at 150mA max. Can you try powering the qwiic mp3 from a separate 3.3v supply?
/mike

Re: Weather Sensor Assembly SEN-08942

 by n1ist ¦  Thu May 02, 2019 6:51 pm ¦  Forum: Combo boards & other ¦  Topic: Weather Sensor Assembly SEN-08942 ¦  Replies: 4 ¦  Views: 71

Per the document, the magnet in the vane can activate two adjacent reed switches at once when half-way between the 45 degree points. The values for the 45 degree points are for a single resistor (33k, 8k2, 1k, 2k2, 3k9, 26k, 120k, 64k9). The values for the points between these are for two resistors ...

Re: Large scale LED project - suggestions needed

 by n1ist ¦  Thu Apr 18, 2019 8:04 am ¦  Forum: Projects ¦  Topic: Large scale LED project - suggestions needed ¦  Replies: 2 ¦  Views: 67

A few ideas/issues: - How rapidly do you want to have the tiles change from one pattern to another? This will affect the physical layer. - Do you want the changes to be synchronized? If so, don't forget the time it will take a signal to get from one end to the other - Power - each tile will need abo...

Re: Project enclosure with battery door

 by n1ist ¦  Mon Apr 08, 2019 4:45 pm ¦  Forum: Projects ¦  Topic: Project enclosure with battery door ¦  Replies: 2 ¦  Views: 109

I'd hop over to Digikey and do a search there. Depending on "roughly", what about H759V,GY (Serpac)

If you are going from a 5v source to a 3.3v level input, just use a resistor divider. It's cheaper and easier.
/mike

Re: nRF52840 mini UART pins?

 by n1ist ¦  Sat Apr 06, 2019 9:52 am ¦  Forum: Bluetooth ¦  Topic: nRF52840 mini UART pins? ¦  Replies: 9 ¦  Views: 137

The Uno only has one hardware serial port, and that is tied to the USB to Serial chip. If you have a usb-to-serial cable or board handy, I would try using that first connected to the nRF module to cut the problem in half. If not, you will need to use software serial on the Uno to connect to the nRF,...

Re: Com-10790 rotary encoder

 by n1ist ¦  Sat Mar 30, 2019 8:47 am ¦  Forum: Inertial Measurement Units ¦  Topic: Com-10790 rotary encoder ¦  Replies: 2 ¦  Views: 75

I don't have one; this is based on the data sheets. It looks like the part number is E6A2-CS3E. That translates to a single output on "A" that is a "voltage" output (in other words, an open collector with a built-in pullup resistor). One of the comments suggests that you may need an external pullup,...

Re: Battery Issue

 by n1ist ¦  Thu Mar 28, 2019 5:32 pm ¦  Forum: Power Management ¦  Topic: Battery Issue ¦  Replies: 3 ¦  Views: 117

A few things: - A buck converter needs some headroom; you can't convert 5v in to 5v out. How much depends on the chip, inductor, and other losses in the circuit - If you intend to monitor multiple cells in a pack, you need to be very careful how you connect them to the ADC; keep in mind where the te...

Re: Trying to connect the smoke detector shown to a red board.

 by n1ist ¦  Wed Mar 27, 2019 10:45 am ¦  Forum: Air Quality ¦  Topic: Trying to connect the smoke detector shown to a red board. ¦  Replies: 2 ¦  Views: 45

That chip is designed to be used in a standalone detector, so they don't have a convenient way of doing this. Two options come to mind - use the interconnect pin and live with the 3.7 second delay, or use the RLED output. If you use RLED, you will need to ignore whatever the chip does for the low ba...

Re: ESP32 Lipo Battery

 by n1ist ¦  Tue Mar 26, 2019 9:11 am ¦  Forum: ESP System on a Chip(SOC) ¦  Topic: ESP32 Lipo Battery ¦  Replies: 2 ¦  Views: 56

Looking at the pictures, I believe you connected the battery with the wrong polarity. The board shows a + and - label above the connector; you need to use a battery that has the red wire connecting to + when it is plugged in.
/mike

You can only have one device with a given address on an I2C bus. You can have many devices on the bus if they each have their own address. What the mux does is take in one I2C bus and lets you connect it to one of 8 connectors at a time. That way, if you have two devices with the same address, you w...

Re: Pressure Sensor MS5803-14BA

 by n1ist ¦  Fri Mar 15, 2019 12:53 pm ¦  Forum: Pressure Sensors ¦  Topic: Pressure Sensor MS5803-14BA ¦  Replies: 3 ¦  Views: 115

I just downloaded it and I see the library. They had problems the past two days with power and servers being down, so you may have just caught things at a bad time.
/mike

Re: New forum color scheme

 by n1ist ¦  Sat Mar 09, 2019 8:46 pm ¦  Forum: General Chit Chat ¦  Topic: New forum color scheme ¦  Replies: 8 ¦  Views: 275

I agree; way too many categories.
/mike

  • 1
  • 2
  • 3
  • 4
  • 5
  • 71