Search found 8 matches

by jacquelbot
Tue Nov 06, 2018 10:47 am
Forum: General Chit Chat
Topic: Can this be used as I2C Master?
Replies: 5
Views: 1482

Re: Can this be used as I2C Master?

How about this Sparkfun board: https://www.sparkfun.com/products/13990
Processor + bluetooth (+WiFi & NFC if that's of interest to you) and it's got two I2C ports to talk to your sensor AND it's cheaper than the bluetooth module you linked above.
by jacquelbot
Thu Oct 11, 2018 1:38 pm
Forum: General Chit Chat
Topic: From prototype to production?
Replies: 7
Views: 1929

Re: From prototype to production?

With practice (and the right tip), tiny parts certainly can be hand soldered. For prototypes with SMT parts, a step between solderless breadboard and custom PCB can be using adapter boards. Check out all the different ones available on Digikey https://www.digikey.com/products/en/prototyping-fabricat...
by jacquelbot
Thu Oct 11, 2018 9:39 am
Forum: Projects
Topic: Alternating 3 LED project
Replies: 3
Views: 219

Re: Alternating 3 LED project

I think this would be simplest with an Arduino. There's a sample program called "Blink," it's one of the simplest possible programs, that could be modified a little to do what you want. I'm imagining you using 3 LEDs of each color so that you can diffuse the light and have a reasonably large circle ...
by jacquelbot
Tue Oct 09, 2018 1:21 pm
Forum: Projects
Topic: Arduino Programming for Salami Production
Replies: 3
Views: 666

Re: Arduino Programming for Salami Production

That sounds like a really fun, kinda big project! This https://www.sparkfun.com/products/14236 will let you turn on and off your cooler/light/humidifier/fan from the Arduino. (I think this is what you meant by "switch board"?) Unfortunately, I think you'll need a separate one for each appliance sinc...
by jacquelbot
Tue Apr 12, 2016 6:34 am
Forum: SparkFun Product Questions
Topic: Getting started using Flexinol wire.
Replies: 1
Views: 218

Re: Getting started using Flexinol wire.

Have you tried it with a real power supply? A regular 9V battery is not going to give you enough current (or at least not for very long!). From the Dynalloy site, the Flexinol wire with a pull force of 2.83 lbs requires about 1.5 amps for a second to cause that kind of contraction.
by jacquelbot
Tue Feb 09, 2016 8:14 am
Forum: SparkFun Product Questions
Topic: Questions about FLiR Lepton
Replies: 1
Views: 173

Re: Questions about FLiR Lepton

On page 42 of the FLIR Lepton's datasheet, it has a specification that the maximum range of temperatures that can be distinguished inside a scene is 0 - 400 degrees Kelvin. So looking at a 110 degC object in a roughly room temperature (23degC-ish?) place would only give you a swing of 87 degC (or de...
by jacquelbot
Tue Feb 09, 2016 7:59 am
Forum: SparkFun Product Questions
Topic: Sunny Buddy fault light
Replies: 6
Views: 485

Re: Sunny Buddy fault light

The datasheet of the LT3652 chip explains what it means. Basically if a fault occurs during battery charging, like overheating (NTC resistor) or charging takes too long, that pin goes high . But it is to be read in combination with the notCHRG pin. Why don't you connect leds to it? Better to be sur...
by jacquelbot
Mon Feb 08, 2016 12:21 pm
Forum: SparkFun Product Questions
Topic: Sunny Buddy fault light
Replies: 6
Views: 485

Re: Sunny Buddy fault light

If the charging chip is seeing a problem, it'll pull the fault line LOW. If you're seeing a positive voltage on that pad, the LT3652 (U1) thinks everything is a-ok. Here's the relevant snippet from the datasheet: "FAULT (Pin 5): Open-Collector Charger Status Output; typically pulled up through a res...