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by phalanx
Thu May 17, 2018 5:43 am
Forum: PCB Design Questions
Topic: IPC Certification for PCB Designer???
Replies: 2
Views: 183

Re: IPC Certification for PCB Designer???

In my facility, we deal primarily with equipment destined to be used by the military. We occasionally design circuit boards but none of us on the engineering side of the equation are IPC certified. On our production side of the building, they are required to be IPC certified for soldering, board ass...
by phalanx
Mon May 14, 2018 5:48 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: pic16f628 UART
Replies: 2
Views: 82

Re: pic16f628 UART

In situation like this where you trying to get 2 units to communicate with each other without a known working means of debugging the system, you need to break down your test setup into multiple parts. Instead of having the PIC talk to the Arduino, feed it to the serial port on a PC that you know wor...
by phalanx
Fri May 04, 2018 6:34 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Trying to implement the WS2811 driver--code debugging
Replies: 1
Views: 156

Re: Trying to implement the WS2811 driver--code debugging

It's been a while since you posted so I was curious if you have made any progress with your problem. I don't have any immediate experience with the nuances of the CLC module but I may have some time over the next day or two to look into it if you still need help.

-Bill
by phalanx
Fri May 04, 2018 6:32 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Changeover and High Voltage Detection With PIC12F675
Replies: 1
Views: 34

Re: Changeover and High Voltage Detection With PIC12F675

Have you tried blinking an LED with the PIC yet?

-Bill
by phalanx
Tue Mar 27, 2018 7:00 am
Forum: PIC Microcontrollers - Software and Hardware
Topic: GPS configuring with PIC16F876A
Replies: 5
Views: 177

Re: GPS configuring with PIC16F876A

I still don't see a properly formatted ISR in your code. I'm assuming you are using Microchip's XC8 compiler so here is a quick reference on how to format one in your code: http://microchipdeveloper.com/faq:31. It's also well documented in the users guide that comes with XC8. Also, ISRs are supposed...
by phalanx
Fri Mar 23, 2018 8:02 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: GPS configuring with PIC16F876A
Replies: 5
Views: 177

Re: GPS configuring with PIC16F876A

I understand the case of data(), but this loop happens after I get the string from GPS function. So how could delay in this could cause Overrun error??? You still have data() being called deeper in your GPS() function that will bring additional 20ms delays. You may receive a character or two but yo...
by phalanx
Thu Mar 22, 2018 12:09 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: GPS configuring with PIC16F876A
Replies: 5
Views: 177

Re: GPS configuring with PIC16F876A

Hi Athul, The overrun bit (OERR) is set when the receive FIFO is full and you try to receive another serial byte. The FIFO can hold 2 bytes so if a 3rd byte is shifted in before you read out at least 1 byte from the RCREG, the overrun bit will be set and will block any further reception until you re...
by phalanx
Mon Mar 19, 2018 8:54 am
Forum: SparkFun Site Questions/Comments
Topic: Forum search not working
Replies: 3
Views: 221

Re: Forum search not working

Here is what one of the Sparkfun Administrators had to say:
I've optimized the search tables in the database, it seems to be working now. Please let me know if this continues. I'll have to up the timeout on php if it continues.
-Bill
by phalanx
Sun Mar 18, 2018 2:29 pm
Forum: SparkFun Site Questions/Comments
Topic: Forum search not working
Replies: 3
Views: 221

Re: Forum search not working

Now that you mention it, it's not working for me either. I'll pass it along to the appropriate people.

-Bill
by phalanx
Fri Feb 23, 2018 7:08 am
Forum: Projects
Topic: Jeep brake/tail lights
Replies: 10
Views: 376

Re: Jeep brake/tail lights

That's an excellent start to your project. I wish more people would write down details in that manner. It would help them and anyone providing assistance during the implementation stage. If you intend to work though this on your own, you are at the point where you will need to start learning about s...
by phalanx
Mon Feb 19, 2018 11:03 am
Forum: Projects
Topic: Jeep brake/tail lights
Replies: 10
Views: 376

Re: Jeep brake/tail lights

You are correct. Modeling can much more than a mathematical formula. To tackle a project like this, you need to know a number of things. For example: Inputs: What signals are available? What states can they be in (including transitions between states)? Are there any characteristics of the inputs tha...
by phalanx
Wed Feb 14, 2018 9:19 pm
Forum: Projects
Topic: Jeep brake/tail lights
Replies: 10
Views: 376

Re: Jeep brake/tail lights

One thing I overlooked that will definitely help you out is you have a 3rd brake light signal that should be independent of your tail lights. In any single mode of operation, it will be easy to determine whether a brake, hazard, or directional has been triggered. Where things get more complicated is...
by phalanx
Wed Feb 14, 2018 6:42 am
Forum: Projects
Topic: Jeep brake/tail lights
Replies: 10
Views: 376

Re: Jeep brake/tail lights

This is certainly doable but there are some aspects of how the electrical system in a vehicle works that you need to consider. The first problem is how do you get power for your device? When used as a brake light, you have power available as long as you have your foot on the brake. How do you handle...
by phalanx
Mon Feb 12, 2018 12:54 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: PIC I2C using Colour sensor
Replies: 4
Views: 1172

Re: PIC I2C using Colour sensor

I apparently forgot to look at this post again after replying the first time.

Avianate, there are lots of reasons why your SDA and SCL lines could be stuck low. We will need more information on your setup and initialization code for your PIC before we can be of any more help.

-Bill
by phalanx
Thu Feb 01, 2018 8:18 am
Forum: Arduino
Topic: Trying To Measure Impact Force?
Replies: 6
Views: 233

Re: Trying To Measure Impact Force?

Without access to the system, no one can say whether or not a 500Hz sampling rate is adequate. To know for certain, you should look at the output of your resistor using an oscilloscope to capture an impact so you can measure the actual duration of the event and set your sampling rate accordingly. -B...