Search found 2339 matches

by jremington
Wed Feb 13, 2019 6:10 pm
Forum: SparkFun Product Questions
Topic: Big easy driver gets too hot when connected to 12V
Replies: 3
Views: 65

Re: Big easy driver gets too hot when connected to 12V

That is a low impedance motor, with maximum allowed current of 1.7 Amperes/winding. If you connect it directly to 12V, it will draw over 7 Amperes and burn up. However, the Big Easy driver, using the A4988 chip, cannot handle more than about 1 Ampere/winding continuously, without forced air cooling....
by jremington
Wed Feb 13, 2019 11:58 am
Forum: SparkFun Product Questions
Topic: Big easy driver gets too hot when connected to 12V
Replies: 3
Views: 65

Re: Big easy driver gets too hot when connected to 12V

9V batteries are for smoke alarms, and are totally unsuitable to power motors of any type. The Big Easy driver cannot supply the maximum current drawn by many types of stepper motors without overheating. You MUST follow the instructions for setting the current limit properly. Please post a link to t...
by jremington
Sun Feb 10, 2019 10:55 am
Forum: Projects
Topic: Power transformer monitoring device
Replies: 1
Views: 45

Re: Power transformer monitoring device

Can I get any help from this forum?
Post a question, with the required background information, on a specific topic and perhaps someone can help.
by jremington
Thu Feb 07, 2019 4:40 pm
Forum: Wireless/RF
Topic: Copper Balancing
Replies: 6
Views: 69

Re: Copper Balancing

Do you not know what an "RF module" is, or do you not know what a "PCB footprint" is?
Google will be happy to tell you something about each one.
by jremington
Thu Feb 07, 2019 9:23 am
Forum: Wireless/RF
Topic: Copper Balancing
Replies: 6
Views: 69

Re: Copper Balancing

this extra copper is going to affect/degrade the performance of my RF PCB Of course it will. The design of RF PCBs is best left to people with lots of training and experience, who also have the equipment needed to figure out what went wrong. A good rule of thumb is that the first board never works ...
by jremington
Fri Feb 01, 2019 3:44 pm
Forum: SparkFun Product Questions
Topic: noninvasive current sensor ECS1030-L72 & PIC18
Replies: 11
Views: 2599

Re: noninvasive current sensor ECS1030-L72 & PIC18

Please start your own thread.

If you actually want help, post useful information like a complete circuit diagram and a clear description of the problem.
by jremington
Wed Jan 30, 2019 8:33 pm
Forum: Projects
Topic: PID heater
Replies: 2
Views: 63

Re: PID heater

Not without many more details, like what, exactly, will be heated, using what as a heater, with which heater controller, to what temperature, and using what power source. Please post links to product pages, if you have identified any of these items.
by jremington
Mon Jan 28, 2019 4:10 pm
Forum: SparkFun Product Questions
Topic: Help with OpenLog - not writing last byte(s) to file
Replies: 4
Views: 103

Re: Help with OpenLog - not writing last byte(s) to file

https://learn.sparkfun.com/tutorials/openlog-hookup-guide/command-set Escape Characters Explanation:The reason OpenLog requires CTRL+z hit 3 times to enter command mode is to prevent the board accidentally being reset during upload of new code from the Arduino IDE. There is the chance that the board...
by jremington
Sun Jan 27, 2019 9:00 pm
Forum: SparkFun Product Questions
Topic: Help with OpenLog - not writing last byte(s) to file
Replies: 4
Views: 103

Re: Help with OpenLog - not writing last byte(s) to file

You have to close the file to write the final buffer. I do that by sending 3 ^Z characters, as instructed in the user guide.
by jremington
Sat Jan 26, 2019 9:31 am
Forum: GPS
Topic: SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)
Replies: 3
Views: 101

Re: SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)

Of course it is possible. Consider investigating the expensive surveyor base stations to find out what is inside them.

Perhaps you meant to ask "where can I buy a $100, 2.5 cm accurate GPS module"?
by jremington
Fri Jan 25, 2019 12:46 pm
Forum: GPS
Topic: SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)
Replies: 3
Views: 101

Re: SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)

1. No, you either already know by surveying exactly where you are, in which case the board can produce corrections signals for another board or, 2. Yes, you need a nearby correction service, for which you pay. Sparkfun has plenty of tutorials, so spend some time with them. Start here: https://learn....
by jremington
Tue Jan 22, 2019 5:59 pm
Forum: Arduino
Topic: Really Old Servos
Replies: 3
Views: 99

Re: Really Old Servos

Basic hobby servo operation hasn't changed since the early 1970s.
by jremington
Tue Jan 22, 2019 5:58 pm
Forum: Projects
Topic: lumenati 3x3
Replies: 7
Views: 163

Re: lumenati 3x3

Looks like you have a problem with poorly soldered, or even unsoldered connections.

It is very important to learn to solder correctly. Sparkfun and other hobby distributors have good on line tutorials.
by jremington
Tue Jan 22, 2019 9:56 am
Forum: Projects
Topic: lumenati 3x3
Replies: 7
Views: 163

Re: lumenati 3x3

I have all the connects correct
Probably not. The code could be wrong, too.

But there is no way any of us could be sure, because you forgot to post any useful information.