Search found 329 matches

by darrellg
Fri Oct 19, 2018 3:29 pm
Forum: PCB Design Questions
Topic: Measurement card PCB
Replies: 2
Views: 51

Re: Measurement card PCB

Usually, you buy parts that fit your needs rather than buying parts that fit pre-existing Eagle footprints. If the footprint doesn't exist, it's fairly easy to create a custom one. Sparkfun has a tutorial at https://learn.sparkfun.com/tutorials/making-custom-footprints-in-eagle that explains how to ...
by darrellg
Thu Oct 11, 2018 2:43 pm
Forum: PCB Design Questions
Topic: Review my PCB
Replies: 3
Views: 117

Re: Review my PCB

This was his first post, so it was low-key to get through moderation. His subsequent posts were more overt.
by darrellg
Thu Oct 11, 2018 8:57 am
Forum: PCB Design Questions
Topic: Review my PCB
Replies: 3
Views: 117

Re: Review my PCB

The Chinese PCB manufacturers are getting more creative in their techniques, but their continued insistence on spamming every electronics forum with ads for their services are tiresome.
by darrellg
Wed Oct 10, 2018 10:09 am
Forum: SparkFun Product Questions
Topic: Addressable RGB - COM-12877
Replies: 3
Views: 40

Re: Addressable RGB - COM-12877

You can also feed voltage to both ends. This will be more effective with heavier gauge wire. See https://learn.adafruit.com/adafruit-neopixel-uberguide/powering-neopixels for a more detailed explanation, particularly this section: https://learn.adafruit.com/adafruit-neopixel-uberguide/powering-neopi...
by darrellg
Wed Oct 10, 2018 8:53 am
Forum: SparkFun Product Questions
Topic: Addressable RGB - COM-12877
Replies: 3
Views: 40

Re: Addressable RGB - COM-12877

Each of the LEDs retransmits the signal, so distance from first to last isn't necessarily the problem for the signal. It sounds like your issue is voltage drop in the cabling. Check the voltage at the far end. Insufficient voltage will cause color problems.
by darrellg
Thu Sep 13, 2018 10:00 am
Forum: Wireless/RF
Topic: RF Remote to Receiver >Arduino for Scoreboard
Replies: 3
Views: 165

Re: RF Remote to Receiver >Arduino for Scoreboard

How is the remote connected to the Arduino? If there is any kind of mechanical switching in your remote receiver (like a relay), you'll need to debounce the Arduino inputs.
by darrellg
Fri Sep 07, 2018 8:55 am
Forum: Wireless/RF
Topic: Bluetooth Module Beginner's Guide
Replies: 1
Views: 87

Re: Bluetooth Module Beginner's Guide

Sparkfun already has one available at https://learn.sparkfun.com/tutorials/us ... esmirf/all.
by darrellg
Fri Sep 07, 2018 8:53 am
Forum: Arduino
Topic: Homemade motorized slide potentiometer
Replies: 2
Views: 191

Re: Homemade motorized slide potentiometer

Why are you trying to recreate the wheel? Even Sparkfun sells motorized linear potentiometers (https://www.sparkfun.com/products/10976), though they can be found cheaper elsewhere.
by darrellg
Fri Aug 03, 2018 8:50 am
Forum: Projects
Topic: How to control a 230V DC motor
Replies: 3
Views: 237

Re: How to control a 230V DC motor

Your lack of knowledge of even the basics along with the high voltages required mean the only thing I can recommend is that you do NOT attempt this project.
by darrellg
Thu Jul 26, 2018 9:29 am
Forum: Projects
Topic: How to tell if my lipo has protection circuit?
Replies: 1
Views: 176

Re: How to tell if my lipo has protection circuit?

The little green PCB under the gold Kapton tape is the protection circuit.
by darrellg
Mon Jul 02, 2018 9:49 am
Forum: SparkFun Site Questions/Comments
Topic: Becoming a Digikey Supplier
Replies: 1
Views: 256

Re: Becoming a Digikey Supplier

I don't know why you'd be asking here instead of at Digikey, but if you go to https://www.digikey.com/en/help/contact-us you'll find a link labeled "New Supplier Inquiries" that leads to a form you can fill out.
by darrellg
Fri Jun 29, 2018 8:51 am
Forum: SparkFun Product Questions
Topic: Pi Servo Hat with RPi_Cam_Web_Interface
Replies: 5
Views: 203

Re: Pi Servo Hat with RPi_Cam_Web_Interface

if you want a response from Sparkfun, then you should probably use the actual Sparkfun support page at https://www.sparkfun.com/technical_assistance.
by darrellg
Wed Jun 27, 2018 9:32 am
Forum: SparkFun Product Questions
Topic: Picobuck LED driver current question
Replies: 2
Views: 163

Re: Picobuck LED driver current question

Connecting LEDs in series does not increase the current requirement. The current requirement for three LEDs in series is the same as one LED. It increases the voltage requirement, and 3 LEDs in series will drop 3 times the voltage as a single LED. This is a user forum. If you want support from Spark...
by darrellg
Fri Jun 22, 2018 10:40 am
Forum: Wireless/RF
Topic: Suggested Wireless Type/Platform For This "Robotics" Application?
Replies: 4
Views: 284

Re: Suggested Wireless Type/Platform For This "Robotics" Application?

The simplest is probably XBee. Once a module is configured, you just treat it like a serial port. The controller can transmit commands and all the pods will receive. As long as you put some type of "address" in the command, the pods will know if it should use or ignore the command. Here's a tutorial...