Search found 7 matches

by roniin
Sat Jun 06, 2020 3:36 pm
Forum: Off topic
Topic: IRF7103 and 3.3V control with STM32
Replies: 7
Views: 1380

Re: IRF7103 and 3.3V control with STM32

I thought IRF7103 for 3.3V control is not a good choice. Thanks for the hint with the AO3400A transistor. I checked if it is available where I live (aliexpress is stopping the project for 1-2 months), I found it. I also found AO4800, it seems to have exactly the same pin distribution as IRF7103. Thi...
by roniin
Fri Jun 05, 2020 7:24 pm
Forum: Off topic
Topic: IRF7103 and 3.3V control with STM32
Replies: 7
Views: 1380

IRF7103 and 3.3V control with STM32

I have used this solution for many years: IRF7103.png IRF7103 is controlled from the Nano v3 or Mega2560 pin with 5V voltage and PWM signal. Mosfet does not heat up and I have no malfunction. They control 6W LED lighting per channel. The scheme is simple, the layout is small and has few elements. Wh...
by roniin
Mon May 18, 2020 8:49 am
Forum: General discussion
Topic: Float To String - Flash memory consumption
Replies: 5
Views: 1467

Re: Float To String - Flash memory consumption

Thanks for the clarification. I have no experience with STM32 :oops:

fredbox - this is what i was looking for. Thank you for your help. Pstring is light and secure against buffer overflow. 8-)
by roniin
Sun May 17, 2020 3:19 pm
Forum: General discussion
Topic: Float To String - Flash memory consumption
Replies: 5
Views: 1467

Float To String - Flash memory consumption

In my program I have to convert the Float variable to String. I know two methods in Arduino. I was surprised by the memory consumption needed for this! Summary of my tests: 1. STM32F103C8, Official core 1.9.0 Compilation of an empty sketch. Flash 9760 (14%), Ram 820 (4%) 2. STM32F103C8, Official cor...
by roniin
Tue May 05, 2020 6:45 pm
Forum: General discussion
Topic: Blue pill, black pill and RadioHead library
Replies: 4
Views: 1307

Re: Blue pill, black pill and RadioHead library

Ok, so I can stay with Roger's core + RadioHead for F104C8 for now. ST-LINK reads that I have 128k Flash, even though it's C8 :) Can I use all 128k memory? If so, I have the perfect platform for my project. The second option is to use RadioLib + Official Core. I was looking for a solution in the for...
by roniin
Tue May 05, 2020 3:55 pm
Forum: General discussion
Topic: Blue pill, black pill and RadioHead library
Replies: 4
Views: 1307

Re: Blue pill, black pill and RadioHead library

Thank you for your reply and information. Of course I will check the STM32 Cube Programmer + Stm32CubeProgrammer (SWD). Regarding the sketch, which with Roger's core compiles and works well on the board, if I set the official core: - Generic SMT32F1 series - BluePill F103C8 64Kb the compiler stops w...
by roniin
Mon May 04, 2020 7:26 pm
Forum: General discussion
Topic: Blue pill, black pill and RadioHead library
Replies: 4
Views: 1307

Blue pill, black pill and RadioHead library

Hello all, I'm new to stm32duino (one week), sorry about that. Until now, I only programmed for AVR. Currently working on the project: LoRa RF95 (SPI) + BME280 (I2C) + BH1750 (I2C) + Oled SSD1306 (SPI) + of course STM32 :). I have one success and a million questions. I started my project on STM32F10...

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