Search found 376 matches

by DanV
Fri Nov 16, 2018 10:39 am
Forum: SparkFun Product Questions
Topic: Alternatives to Make and Sparkfun
Replies: 1
Views: 34

Re: Alternatives to Make and Sparkfun

Digikey
Mouser
Adafruit
Jameco
and many more ...
by DanV
Fri Nov 16, 2018 10:10 am
Forum: Projects
Topic: Sound Level Warning Device: Suggested shopping list
Replies: 4
Views: 53

Re: Sound Level Warning Device: Suggested shopping list

The item 12642 has a microphone on the board.
You won't need the mems mic.
by DanV
Thu Nov 15, 2018 3:08 pm
Forum: Projects
Topic: Sound Level Warning Device: Suggested shopping list
Replies: 4
Views: 53

Re: Sound Level Warning Device: Suggested shopping list

Googling "diy sound level meter" produces 13,500,000 results.
Just pay little attention to the instructables articles. They can often be of little value - untested crap.

As for your shopping list, add this:
https://www.sparkfun.com/products/12642
by DanV
Tue Nov 13, 2018 9:59 am
Forum: Arduino
Topic: Arduino Due and two rotary quad encoders
Replies: 2
Views: 41

Re: Arduino Due and two rotary quad encoders

Aren't you constantly setting the encoder position to zero ?
ribbon1.write(0);
ribbon2.write(0);
by DanV
Sat Nov 10, 2018 8:48 am
Forum: SparkFun Product Questions
Topic: How to interpret output for NIR AS7263 special sensor output
Replies: 3
Views: 56

Re: How to interpret output for NIR AS7263 special sensor output

There's a datasheet here: https://ams.com/documents/20143/36005/AS7263_DS000476_1-00.pdf/85ad9c54-f302-eed2-311b-fc26d2eefa70 Page 11 describes the different wavelengths for each channel. R = 610 nm S = 680 nm and so on. Google "AS7263 datasheet" and there are quite a few references on the device es...
by DanV
Sat Nov 10, 2018 8:41 am
Forum: SparkFun Product Questions
Topic: ESP32 Thing turing off Power Led
Replies: 3
Views: 49

Re: ESP32 Thing turing off Power Led

If you have Google in your part of the world, try searching for "esp32 deep sleep"
by DanV
Fri Nov 02, 2018 1:25 pm
Forum: Arduino
Topic: Code obstacle avoider+ir remote+HC05 bluetooth mobile controller+line follower
Replies: 1
Views: 37

Re: Code obstacle avoider+ir remote+HC05 bluetooth mobile controller+line follower

How about adding code tags around your code?

Exactly what doesn't work?
You might find someone who's willing to sift through your code trying to find something somewhere that's not quite right, but you also might not.
by DanV
Thu Nov 01, 2018 1:02 pm
Forum: Projects
Topic: Automate water pumping system
Replies: 3
Views: 97

Re: Automate water pumping system

Ultrasonic liquid level sensors are general no inexpensive $300+ for good quality devices and they could be hard to interface to a microcontroller. Here's an article on making one: https://maker.pro/arduino/projects/ultrasonic-arduino-water-level-indicator That you could leverage into part of a work...
by DanV
Tue Oct 30, 2018 9:20 am
Forum: Projects
Topic: Question about parts required for a project
Replies: 1
Views: 65

Re: Question about parts required for a project

A reviewer on the product page says this about the big dome pushbutton:
They’re set up for 12v, but you can replace the resistor to use other voltages.
by DanV
Fri Oct 26, 2018 1:59 pm
Forum: SparkFun Product Questions
Topic: Using Sparkfun Motor Driver with Current Sensor
Replies: 1
Views: 42

Re: Using Sparkfun Motor Driver with Current Sensor

Do I need to connect the motor leads (AO1 and AO2) directly to the 2 large holes on the Current Sensor Breakout??? Why are these holes so large? look closely - there are also small holes that are companions to the big holes Do these large holes have anything to do with the current sensing capabilit...
by DanV
Fri Oct 26, 2018 6:33 am
Forum: SparkFun Product Questions
Topic: Sparkfun SAMD21 Device Driver Issue
Replies: 6
Views: 1108

Re: Sparkfun SAMD21 Device Driver Issue

Yeah, this is largely a user supported forum. If you want tech support to answer an issue, you need to contact them. Order and shipping questions? Chat With Us or Email support@sparkfun.com Need Technical Assistance? Check out our Technical Assistance page! https://www.sparkfun.com/technical_assista...
by DanV
Thu Oct 04, 2018 2:34 pm
Forum: Projects
Topic: need help with logics
Replies: 4
Views: 121

Re: need help with logics

That's really what I was implying - don't count on what you may think you know about operator precedence.
by DanV
Thu Oct 04, 2018 8:20 am
Forum: Projects
Topic: need help with logics
Replies: 4
Views: 121

Re: need help with logics

You need more parenthesis:

if (x<=100 || x>=230 && (y>=180 || y<20))

if ((x<=100) || ((x>=230) && ((y>=180) || (y<20))))

You must be very precise about what comparison is being done where - leave no doubt.
Don't count on operator precedence, just brute force it.
by DanV
Fri Sep 28, 2018 2:18 pm
Forum: Projects
Topic: simple timer
Replies: 15
Views: 302

Re: simple timer

Well, it's a solid state relay which has a particular characteristic - in this case likely a Triac device to switch AC loads (switching an AC voltages between 100 and 240V at up to a 2A current). Not going to work on a DC signal switching situation. I don't known what you're switching on the fog mac...
by DanV
Fri Sep 28, 2018 8:44 am
Forum: Projects
Topic: simple timer
Replies: 15
Views: 302

Re: simple timer

What is the part number of your relay?
The specs will likely include the coil voltage and the contact rating.
240ac 2A is certainly not the coil, instead it is the contact rating.