Search found 356 matches

by DanV
Mon Aug 20, 2018 8:40 am
Forum: SparkFun Product Questions
Topic: how to connect 4 wire load cell to load cell combinator
Replies: 6
Views: 504

Re: how to connect 4 wire load cell to load cell combinator

Not sure what your situation is - multiple 4-wire load cells and a combinator? The Hookup guide for the HX711 Amplifier: https://learn.sparkfun.com/tutorials/load-cell-amplifier-hx711-breakout-hookup-guide and Getting Started with Load Cells: https://learn.sparkfun.com/tutorials/getting-started-with...
by DanV
Mon Aug 20, 2018 7:10 am
Forum: Projects
Topic: Tilt Switch and Transistor without Microcontroller
Replies: 1
Views: 38

Re: Tilt Switch and Transistor without Microcontroller

I think you should consider no transistor - just use 9V and tilt switch.
by DanV
Fri Aug 17, 2018 1:31 pm
Forum: Projects
Topic: Rotary encoder on a motor
Replies: 4
Views: 103

Re: Rotary encoder on a motor

You asked very nearly the exact same question 18 months ago. Unfortunately, you would have been much better off with the open collector version of that encoder, rather than the line driver version. I don't believe it's as simple as just hooking up the signals to the Arduino - the line driver being a...
by DanV
Fri Aug 17, 2018 1:26 pm
Forum: Arduino
Topic: Arduino Pro Mini with ROB-14450 Motor Driver
Replies: 1
Views: 70

Re: Arduino Pro Mini with ROB-14450 Motor Driver

Ideally, you measure current in series with the load (motor). But any resistance you put in series will increase the overall resistance so what you use must be small. Measuring the voltage across the measuring resistor will allow you to calculate the current. (0.3 V / 1.0 ohm = 0.3 A) Then there's t...
by DanV
Wed Aug 15, 2018 11:31 am
Forum: SparkFun Product Questions
Topic: Logic Level Converter - Single Supply Voltage In
Replies: 3
Views: 54

Re: Logic Level Converter - Single Supply Voltage In

Have a look at this page where it clearly states you can supply 3.3 and get 5V out and it further refines it to 3.3V output as well.

https://learn.sparkfun.com/tutorials/si ... e-overview
by DanV
Tue Aug 14, 2018 5:40 am
Forum: SparkFun Product Questions
Topic: SX1509 - How to turn off blink
Replies: 9
Views: 115

Re: SX1509 - How to turn off blink

I see no reason that setupBlink() would be rejected by the compiler unless you're not using the gitHub library. I guess you could examine the .h and .cpp file on your computer to see if setupBlink is in there. It nearly has to be there since blink() and breathe() both call setupBlink(). you did make...
by DanV
Mon Aug 13, 2018 9:10 am
Forum: SparkFun Product Questions
Topic: SX1509 - How to turn off blink
Replies: 9
Views: 115

Re: SX1509 - How to turn off blink

You could try:

Code: Select all

setupBlink(myPin, 0, 0, 0, 0, 0):  
by DanV
Mon Aug 13, 2018 8:47 am
Forum: SparkFun Product Questions
Topic: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?
Replies: 10
Views: 126

Re: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?

If 10K is OK now then stick with 10K
by DanV
Fri Aug 10, 2018 2:12 pm
Forum: SparkFun Product Questions
Topic: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?
Replies: 10
Views: 126

Re: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?

I don't think they're available with different ohms top and bottom. 10 Ohms?? most volume knob style pots likely start at 1K if not 10K ... no, connecting top and bottom would defeat the purpose of having 2 pots - I mean they're separate pots, just mechanically linked - if you're using 2 pots now, t...
by DanV
Fri Aug 10, 2018 12:21 pm
Forum: SparkFun Product Questions
Topic: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?
Replies: 10
Views: 126

Re: Hooking up Audio Amp Kit STA540 to MP3 Trigger Board?

There are 2-gang potentiometers available - I don't know if you would need linear taper as opposed to audio taper.
just wire each gang opposite of the other - one is decreasing as the other is increasing.
by DanV
Fri Aug 10, 2018 11:07 am
Forum: SparkFun Product Questions
Topic: SX1509 - How to turn off blink
Replies: 9
Views: 115

Re: SX1509 - How to turn off blink

Well, don't thank me yet - let's see if that works.
the description of 0 is off is from setupBlink() but I think it's the same for blink().
by DanV
Fri Aug 10, 2018 9:30 am
Forum: SparkFun Product Questions
Topic: SX1509 - How to turn off blink
Replies: 9
Views: 115

Re: SX1509 - How to turn off blink

You could try : io.blink(my_PIN, 0, 0); I checked out the github repository and had to look real hard to find (in the .h file): setupBlink(byte pin, byte tOn, byte tOff, byte offIntensity, byte tRise, byte tFall): //blink performs both the blink and breath LED driver functions // - tOn: the amount o...
by DanV
Thu Aug 09, 2018 1:34 pm
Forum: Projects
Topic: adhesive used on keyboard trim
Replies: 3
Views: 81

Re: adhesive used on keyboard trim

Yes, it's a very thin film with likely an acrylic adhesive.
You can this type of product for $6 from
https://www.findtape.com/3M-Scotch-5906 ... 12/?tid=21
by DanV
Wed Aug 08, 2018 9:05 am
Forum: SparkFun Product Questions
Topic: GPS Logger File Naming
Replies: 2
Views: 53

Re: GPS Logger File Naming

If you are using the example sketch from the hookup guide: Then you can easily modify the last function to format the filename yyyymmdd.csv. I'm nearly sure you are limited to 8.3 format for the filename. I don't have a way to test this, but it could work. change this line: sprintf(logFileName, "%s%...
by DanV
Wed Aug 08, 2018 4:59 am
Forum: SparkFun Product Questions
Topic: Autodriver L6470 library not setting step mode
Replies: 4
Views: 73

Re: Autodriver L6470 library not setting step mode

It can't possibly have to do with your use of two different variables?

here you use bdr(i)

Code: Select all

bdr[i].configStepMode(2);   // STEP_FS_4
and here it is brd(i)

Code: Select all

stepmode = brd[i].getStepMode();  // returns 7 (STEP_FS_128)