## Search found 114 matches

Sun Oct 07, 2018 8:11 am
Forum: Projects
Topic: LED DRIVERS ?
Replies: 0
Views: 275

### LED DRIVERS ?

Hello, I am looking to make my own LED lightbulbs that can screw in a traditional 120VAC household socket. So to start, I have realized that I need a LED driver to drive constant current to my leds. I found a constant current LED driver kit in the Sparkfun websit: https://www.sparkfun.com/products/1...
Tue Feb 06, 2018 12:15 pm
Forum: SparkFun Product Questions
Topic: INA169
Replies: 4
Views: 223

### Re: INA169

Ok thank you very much Paulvha

8V
Mon Feb 05, 2018 10:35 am
Forum: SparkFun Product Questions
Topic: INA169
Replies: 4
Views: 223

### Re: INA169

Hello paulvha, Thank you for your reply! So if I understand correctly.... I will not be able to monitor the full 0-1A range! Given the the lowest shunt voltage allowable of 50mv would give me arespective current of: @50mv >>> I=V/R = 50mv/0.3ohms = ~166ma Applying this to their formula to get my vol...
Sun Feb 04, 2018 8:38 am
Forum: SparkFun Product Questions
Topic: INA169
Replies: 4
Views: 223

### INA169

Hi folks, I am looking into using the INA169 part to make a current measuring circuit... heres the link to the hook uo guide: https://learn.sparkfun.com/tutorials/ina169-breakout-board-hookup-guide?_ga=2.162713596.1321664697.1517757853-42432521.1481576911 I was just wondering if I am calculating RS ...
Wed Jan 10, 2018 9:03 am
Forum: PCB Design Questions
Topic: Which PCB layout software should I use?
Replies: 6
Views: 993

### Re: Which PCB layout software should I use?

Anyone
Anyone at aalll???
Tue Jan 09, 2018 5:15 pm
Forum: PCB Design Questions
Topic: Which PCB layout software should I use?
Replies: 6
Views: 993

### Which PCB layout software should I use?

Hello, I was thinking to try and do my own PCB layouts myself And then generate the gerber files so I can Give them to my PCB manufacturer. But I never used such a software and I would like to ask this forum which one I should use? It should allow me to design layouts from the smallest To the bigges...
Tue Oct 24, 2017 2:57 pm
Forum: Projects
Topic: Minimal distance digital circuits next to AC power line
Replies: 1
Views: 341

### Minimal distance digital circuits next to AC power line

Hi,

I have many I/O lines coming from an MCU
which are laid out one next
to each other on a PC board. However I
Will require small metal pegs residing perpendicular
To the pc board. What should be the minimal
distance between the pegs to the digital traces
be?

Pc board with one peg below:

Wed May 31, 2017 9:35 am
Forum: Wireless/RF
Topic: Mesh RF eval board?
Replies: 2
Views: 677

### Mesh RF eval board?

Hello, I am looking to buy the following evaluation board from SF: https://learn.sparkfun.com/tutorials/atmega128rfa1-dev-board-hookup-guide?_ga=2.130719951.1783696041.1496171307-42432521.1481576911 But the only problem is that the sparkfun tutorial at best shows how two of these would communicate. ...
Sun Apr 27, 2014 11:07 am
Forum: Projects
Topic: Why no short?
Replies: 3
Views: 345

### Re: Why no short?

okay, that makes sense!

Sat Apr 26, 2014 12:26 pm
Forum: Projects
Topic: Why no short?
Replies: 3
Views: 345

### Why no short?

Hello, I am using a CD74HC243 quad bus transceiver chip. In the input of a buffer, I applied a 3.3Vdc while keeping its respective output grounded. I was just curious as to why the chip is able to handle this without burning up. When the 3.3VDC passes from B0 to A0, doesn't this make a short?? Pleas...
Wed Jan 29, 2014 11:44 am
Forum: PIC Microcontrollers - Software and Hardware
Topic: LATFCLR, LATFSET and LATFINV?
Replies: 0
Views: 480

### LATFCLR, LATFSET and LATFINV?

Hi,

Does anyone know how to use LATFCLR, LATFSET and LATFINV hardware registers to do atomic IO operations in PIC32.

I am looking for some examples on how to toggle on and off a pin!

Thanks
Sat Jan 25, 2014 4:19 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Pic32 is slow?
Replies: 7
Views: 1947

### Re: Pic32 is slow?

Hi waltr, I am currently using MikroElektronika's C compiler. And I have ran the following code: with a 3.3 MHZ at the output pin, here's the code: void main(){ do { iO_PIN33_G1CR = 0; // Turn off iO_PIN33_G1CR = 0; // Turn off iO_PIN33_G1CR = 1; // Turn on iO_PIN33_G1CR = 1; // Turn on } while(TRUE...
Sat Jan 25, 2014 12:17 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Pic32 is slow?
Replies: 7
Views: 1947

### Pic32 is slow?

Hello, I am toggling a pin from high to low in a closed continuous loop, I measure approximately a frequency of 3MHZ. Why is PIC32 so slow? I have read that there are ways to configure wait states and prefetch operations in order to get the Pic to perform a lot more efficiently but I find no example...
Mon Jan 20, 2014 9:36 pm
Forum: Projects
Topic: 144 pin package to Pdip converter?
Replies: 1
Views: 600

### 144 pin package to Pdip converter?

Hello, I am currently breadboarding with traditional Bread boards of 0.1" pitch (from hole to hole). I have a convertor custom made that converts A 100 pin tqfp to pdip so it can for in my traditional Bread board which is 63x2 wide. However, what happens if one want to breadboard a part that had 144...
Fri Dec 06, 2013 12:18 am
Forum: PIC Microcontrollers - Software and Hardware
Topic: Should we use malloc in MCUs?
Replies: 9
Views: 2269

### Re: Should we use malloc in MCUs?

These days, it might be easier to just get a micro with a bigger memory, as 64K or 128K is not all that expenisve, and still have lots of Flash for code. which is my case.... Pic32... soon 0.5 meg of ram!! How could mallocing a few 5k blocks be a problem? I'm debating.... :think: thanks all for you...