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Re: Cut power to TLC5940 => LEDs turn on

 by the_julle ¦  Thu Oct 11, 2018 1:41 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Cut power to TLC5940 => LEDs turn on ¦  Replies: 3 ¦  Views: 283

Okay, so an idea is to use a transistor on the 9V wire between the source and the first diode. Then connect an Arudio I/O to the base of the transistor. Would this work? Then I can cut the Vcc voltage to the TLC5940 chip, and then cut the LED voltage. This should cut the power to the chip and make s...

Cut power to TLC5940 => LEDs turn on

 by the_julle ¦  Thu Oct 04, 2018 12:31 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Cut power to TLC5940 => LEDs turn on ¦  Replies: 3 ¦  Views: 283

Hi. I'm using the TLC5940 breakout board to supply some LEDs. But at times, I need to turn off the LEDs to use as little power as possible. This includes cutting off the power to the TLC5940. However, that is not as easy as it may sounds. When cutting the power to the TLC5940, the LEDs will actually...

Re: Pro Micro: Sleep uses 3mA

 by the_julle ¦  Tue Jul 17, 2018 4:57 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Sleep uses 3mA ¦  Replies: 2 ¦  Views: 303

Which components?

As I understand it, besides ADC and BOD, the other modules only apply in idle modes? I'm sleeping in PowerDown mode.

Pro Micro: Sleep uses 3mA

 by the_julle ¦  Fri Jul 13, 2018 5:08 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Sleep uses 3mA ¦  Replies: 2 ¦  Views: 303

Hi. I'm using the Pro Micro , with a 9V battery connected to the RAW pin. In addition, I'm using the TLC5940 breakout board to supply some LEDs. I'm using the Low-Power library. I have removed the power LED, but obviously need the regulator. When I enter sleep mode, I still have a power consumption ...

Re: External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Wed Jul 11, 2018 12:21 pm ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

Okay. What is the difference between powering the 5940 chip using the external 9V supply, or the 5V powered from the regulated signal from the Arduino? If I power the 5940 chip with 9V, then I need a regulator on both the Arduino and the 5940 - which of course is already there, but doesn't I waste a...

Re: External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Mon Jul 09, 2018 12:51 pm ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

Thank you for your reply! Yes, so you confirms that the original design I had in mind is valid: 5V to the chip from Arduino, and External power supply to power the LEDs. When using the SparkFun LED Driver Breakout - TLC5940 (16 Channel) , this will be the wiring: Vcc from Arduino to Vcc Led Driver. ...

Re: External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Sun Jul 08, 2018 6:45 am ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

Anyone? :-)

Re: External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Thu Jul 05, 2018 2:08 pm ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

See drawings.

Re: External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Thu Jul 05, 2018 2:08 pm ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

See drawings.

External power to SparkFun TLC5940 Breakout

 by the_julle ¦  Thu Jul 05, 2018 2:07 pm ¦  Forum: SparkFun Product Questions ¦  Topic: External power to SparkFun TLC5940 Breakout ¦  Replies: 7 ¦  Views: 450

Hi All. Hardware: SparkFun Pro Micro 5V SparkFun LED Driver Breakout - TLC5940 (16 Channel) I'm using the Pro Micro as a battery powered device, to control some LEDs on my kids little toy car. I was thinking of using 6*1.5V batteries a total of 9V. I have 3 different design choices, and I do not kno...

Re: Pro Micro: Issue with Serial1

 by the_julle ¦  Wed May 17, 2017 12:22 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Issue with Serial1 ¦  Replies: 6 ¦  Views: 1383

Yep, that must be the issue. I have made this code on the Mega: void setup() { Serial.begin(9600); Serial1.begin(9600); Serial3.begin(9600); } void loop() { Serial3.print("A"); if (Serial1.available()) { int inByte = Serial1.read(); Serial.write(inByte); } if (Serial.available()) { int inByte = Seri...

Re: Pro Micro: Issue with Serial1

 by the_julle ¦  Wed May 17, 2017 12:00 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Issue with Serial1 ¦  Replies: 6 ¦  Views: 1383

Aha, I think I finally found the issue here.....

I don't have a RS232 to TTL converter, which means my USB-RS232 is not getting correct input data :-) Next step is to try i loop-back, so sending from Serial1 to Serial0 as that should work.

Re: Pro Micro: Issue with Serial1

 by the_julle ¦  Tue May 16, 2017 11:52 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Issue with Serial1 ¦  Replies: 6 ¦  Views: 1383

And the recorded data, from a MEGA.

Re: Pro Micro: Issue with Serial1

 by the_julle ¦  Tue May 16, 2017 11:51 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Issue with Serial1 ¦  Replies: 6 ¦  Views: 1383

Thank you for your reply. I have now done further testing. I have tested the signal using a scope, see the attached screenshot. I'm not sure what to exactly look for? :-) However, I have tested the same code with the original Arduino Mega, and it seems to be the same signal. Also, when using Putty t...

Pro Micro: Issue with Serial1

 by the_julle ¦  Mon May 15, 2017 2:50 am ¦  Forum: SparkFun Product Questions ¦  Topic: Pro Micro: Issue with Serial1 ¦  Replies: 6 ¦  Views: 1383

Hi All. I'm using a Pro Micro with the ATmega32U4 (5V, 16MHz) microprocessor and built-in USB programmer. This is the one I have: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=272374507509 which is a clone of: https://www.sparkfun.com/products/12640 QUESTION 1 I have tested with two setups: 1...