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Forum: Microcontrollers (MCU) 04-23-2017, 12:31 PM
Replies: 1
Views: 1,081
Posted By tracert
stm32f407 clocked at 8MHz drawing 17mA?

I play with pretty naked boards on eBay stm32f407, and I'm surprised the current consumption is higher than I expected at 17mA? Google links shows 200-250uA/MHz - but maybe that's not correct at low...
Forum: Microcontrollers (MCU) 04-10-2017, 02:02 PM
Replies: 0
Views: 1,156
Posted By tracert
10MHz frequency counter

I made a feature: dcf77 frequency, and for testing I would like to have permission of reading 0.1 Hz. Of frequency well in school don't go so low. Another option is the Philips frequency counter (I...
Forum: Projects and Advices 02-25-2017, 01:09 PM
Replies: 1
Views: 1,927
Posted By tracert
For $25 you can abruptly make to the scheme. Yes...

For $25 you can abruptly make to the scheme. Yes the transformer and, in principle, any and not just from the door lock. Nothing useful in this article is not saw.
Forum: Projects and Advices 02-11-2017, 07:38 PM
Replies: 1
Views: 1,820
Posted By tracert
The unusual decision. But perhaps it is...

The unusual decision. But perhaps it is operational. Check one must ... And if we compare this with the scheme that is used in welding inverter? There pitalovo first fed through a resistor, then it...
Forum: Projects and Advices 01-20-2017, 06:46 PM
Replies: 2
Views: 2,053
Posted By tracert
After reading the article also asked the...

After reading the article also asked the question. Here, the allowable voltage for the reverse bias of the photodiode is really limited by the characteristics of the specific amplifier. But the...
Forum: Projects and Advices 08-23-2016, 12:20 PM
Replies: 6
Views: 4,680
Posted By tracert
Arduino has a convenient platform for the novice...

Arduino has a convenient platform for the novice programmer. Such a device is very useful for radio amateurs. Most of the measurement accuracy is not necessary.
Forum: Projects and Advices 06-27-2016, 07:18 PM
Replies: 1
Views: 4,700
Posted By tracert
Antenna array using hfss

I want to simulate an 8 antenna array on hfss and it takes alot of time
How can i calculate only 2 antenna or activate 2 antenna in the simulation
And how can i combine the radiation patern for...
Forum: Projects and Advices 06-27-2016, 07:17 PM
Replies: 1
Views: 5,234
Posted By tracert
The 3524 schematic has a poor gate driver circuit.

The 3524 schematic has a poor gate driver circuit.
Forum: Projects and Advices 05-26-2016, 06:55 PM
Replies: 1
Views: 7,619
Posted By tracert
R-R interval detection in ECG in matlab?

HI ALL..very good day

my name is asghar

can someone plz help me to detect the R-R interval in ECG in matlab?
i really need help as im doing my final year project
Forum: Projects and Advices 02-29-2016, 09:02 PM
Replies: 2
Views: 6,994
Posted By tracert
hello, Uoc check options h21 ( BC547 -...

hello, Uoc

check options h21 ( BC547 - 2SC1815), (SK100 - 2SB772)
Forum: Beginners 02-13-2016, 08:04 AM
Replies: 2
Views: 6,195
Posted By tracert
I think something is missing here. Don't you need...

I think something is missing here. Don't you need at least three conductors to do this?
Forum: Microcontrollers (MCU) 01-03-2016, 09:14 AM
Replies: 3
Views: 8,120
Posted By tracert
For future reference - please use code tags...

For future reference - please use code tags around sections of program listing, it prevents the forum removing the formatting. Highlight the code then click the '#' symbol in the message window...
Forum: Microcontrollers (MCU) 01-03-2016, 09:11 AM
Replies: 1
Views: 6,028
Posted By tracert
Hi Rocket you have to use this format -...

Hi Rocket
you have to use this format - AT+CMGS="+447123456789" then next line commands (this is correct if you use SIM900 or quectel modems). you read the character '>' as reply from the Modem...
Forum: Microcontrollers (MCU) 12-06-2015, 06:09 PM
Replies: 2
Views: 7,160
Posted By tracert
Hi, Thanks, this is the reason why I ask, I know...

Hi, Thanks, this is the reason why I ask, I know that the Arduino can just handdle 5volts like Pic do, so, this is my question? How to do it. I have in mind make some kind of PCB with maybe solid...
Forum: Microcontrollers (MCU) 12-04-2015, 02:01 PM
Replies: 1
Views: 7,085
Posted By tracert
Questions about UART communication

I have a few questions about what I have observed using UART to communicate between two microcontrollers in the lab a few hours ago.
For those who dont know, UART is a form of serial communication...
Forum: Microcontrollers (MCU) 11-30-2015, 05:07 PM
Replies: 2
Views: 7,160
Posted By tracert
Using Arduino to high current 12volts inputs and output

Hi guys, I just wondering if someone make it already, I am going to start using Arduino to my projects, but, I need that the Arduino read 12volts signals and the Arduino drive 12volts outputs, I have...
Forum: Projects and Advices 11-26-2015, 10:09 AM
Replies: 1
Views: 8,715
Posted By tracert
Programming an EEPROM

I want to programe an EEPROM 27C256 that allows me to convert a BCD number to a binary number. I want to introduce 3 bcd numbers (12 bits) and obtain a 8 bits binary number (from 0 to 255). I have...
Forum: Projects and Advices 11-20-2015, 08:51 AM
Replies: 0
Views: 8,008
Posted By tracert
Drawing power from inside PS4 to power peripherals

I have 2 80mm fans lying around from some RAM I bought and they happen to be the perfect thickness to stick to the back of a ps4 system. It would be trivial to power them with a usb cable (albeit at...
Forum: Microcontrollers (MCU) 10-19-2015, 05:16 PM
Replies: 1
Views: 7,719
Posted By tracert
11x42 LED Matrix with Arduino UNO

I'm planning to build an 11x42 LED Matrix for my Daft Punk Helmet .

I decided to split into 2 sub-matrizes, 11x21 each.
Therefore I will need 11+21 = 32 bits to control each sub-matrix with...
Forum: Beginners 10-16-2015, 05:07 PM
Replies: 1
Views: 6,407
Posted By tracert
Cheap & simpe Arduino projects ???

i want to make a simple arduino project
please suggest me a simple project ?


we already have
a line following robot , a fire detector, & a object sensor

thanks in advance
Forum: Microcontrollers (MCU) 08-13-2015, 05:14 PM
Replies: 1
Views: 7,500
Posted By tracert
Software to control COM or Parallel port pin output

Is there software that can allow me to "ground" (and unground ???) a pin on either a com port or parallel port on a PC using Win XP?
Forum: Microcontrollers (MCU) 08-07-2015, 01:32 PM
Replies: 1
Views: 6,941
Posted By tracert
Simple control a DC motor via Arduino UNO

hi sirs, this is my first topic in this forums ..
i want to control a 12v and a 5v dc motor with 2 terminals only .. not steppers .. and i have not a drive motor shield or its IC. i want not to...
Forum: Beginners 08-05-2015, 06:29 AM
Replies: 2
Views: 8,387
Posted By tracert
Can you please explain what you are trying to do?...

Can you please explain what you are trying to do? This was very vague.

Are you wanting to control a high voltage, or create a high voltage?
What kind of current will you deal with?
How fast...
Forum: Projects and Advices 07-26-2015, 11:32 AM
Replies: 2
Views: 10,160
Posted By tracert
Right, I forgot to mention this. There are two...

Right, I forgot to mention this. There are two batteries in serial, so VBAT never goes below 6V.
Concerning the consumption, the sensor (without WiFi) seems to be using ~40mA.
But here's...
Forum: Projects and Advices 07-20-2015, 01:42 PM
Replies: 2
Views: 10,160
Posted By tracert
Protection circuit for Li-ion batteries

I've got a bunch of 18650 3.7V li-ion batteries lying around, that I would like to use for connected sensors.

These batteries are fully charged at 4.2V, and I have a nice charger for them. The...
Showing results 1 to 25 of 53

 
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