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nidhi singh
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nidhi singh
Asked: September 15, 2023In:
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Hello, Not sure that the product I am looking for exists. It should behave like an LED driver but after looking through different LEDs I did not find a product that meets my needs.Can drive 1…. 15 LEDs connected in series Have ...Read more

driverledpwmseries
  1. Alex thomas

    Hello, Right, existing LED drivers all have PWM engines. It depends on the LED, some have Vf = 1.8, and some have 3.5V. So, 15x3.5 = 52.5 V in direct mode. Also current, 20 mA or more? For low current low voltage OPA may be an option, or OPA buffered by transistor for high CV. Thank You

    Hello,

    Right, existing LED drivers all have PWM engines.

    It depends on the LED, some have Vf = 1.8, and some have 3.5V. So, 15×3.5 = 52.5 V in direct mode. Also current, 20 mA or more?

    For low current low voltage OPA may be an option, or OPA buffered by transistor for high CV.

    Thank You

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ellasmith
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ellasmith
Asked: September 13, 2023In:
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Hi, I’m working on a circuit based on AiThinker ESP32-C3-13/ 13U- Kit and communicating the ESP32 kit with my computer through GPIO18 and GPIO19. The problem is when I open the COM port on my. In the net operation, MCU resets ...Read more

aithinkercomesp32gpio18gpio19mcuportserial
  1. Julian White

    Hello, You should set handshake after setting property RtsEnable = true. Use properties as below:- _serialPort.RtsEnable = true; _serialPort.Handshake = System.IO.Ports.Handshake.RequestToSend; _serialPort.RtsEnable = false; Thank You

    Hello,

    You should set handshake after setting property RtsEnable = true. Use properties as below:-

     _serialPort.RtsEnable = true;
_serialPort.Handshake = System.IO.Ports.Handshake.RequestToSend;
_serialPort.RtsEnable = false;

Thank You
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vikas Nagpal
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vikas Nagpal
Asked: September 11, 2023In:
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Hello, Three accompanied PWM waveforms Is there a recommended way of producing three accompanied PWM waveforms on an RA4M1? Two is easy with the two outputs from one counter, but how about three? Should I start two counters together, and hope for the ...Read more

mcumicrocontrollerpwmra4m1renesaswaveforms
  1. Julian White

    Hello @Vikas, Thanks for posting your question online. Yes, one way to have multiple synchronized PWM waveforms is to start multiple counters at the same time, as you can see in the screenshot below Regards, Julian White

    Hello vikas Nagpal,

    Thanks for posting your question online.

    Yes, one way to have multiple synchronized PWM waveforms is to start multiple counters at the same time, as you can see in the screenshot below

    Regards,
    Julian White

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sachinsharma
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sachinsharma
Asked: September 1, 2023In:
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Hello, I learned that XDPL8221 can achieve 120- 277V input, 0- 10V dimming, and CC or CV output. These functions are what I need. I also want it to support TRIAC dimmer, can it support TRIAC dimming? Or is there any other recommended ...Read more

dimmersICledtriacxdpl8221
  1. Alex thomas

    Hi @sachinsharma, XDPL8221 has a PWM dimming interface which is implemented with the aid of CDM10V. The duty cycle sensed at the PWM pin will set the output current accordingly. Please have a look at the LED/SMPS Flyback Control IC IRS2982S which may fulfill your requirement. This driver is TRIAC diRead more

    Hi sachinsharma,

    XDPL8221 has a PWM dimming interface which is implemented with the aid of CDM10V. The duty cycle sensed at the PWM pin will set the output current accordingly.

    Please have a look at the LED/SMPS Flyback Control IC IRS2982S which may fulfill your requirement. This driver is TRIAC dimmable. Refer to the attached application note for more details.

    Regards,
    Alex Thomas

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nidhi singh
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nidhi singh
Asked: August 28, 2023In:
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Hi, I need help with the PDO2 output in STUSB4500. In spite of setting the PDO Number as 3 and configuring the PDO2 voltage and current values using the STSW- STUSB002 GUI, I can not get any voltage output at PDO2. ...Read more

ledpdo1pdo2pdo3pdosstusb002stusb4500voltage
  1. ashishgawade

    Hello I assume that you're using our STEVAL_ISC005V1 board and what you call 'PDO1' is Vsnk from the schematic. However, Vsnk lights are on for all PDOs selections. Whereas PDO2 is ON if PDO2 is selected and PDO3 if PDO3 is selected. Our algorithm always tries to select the highest voltage. If the cRead more

    Hello

    I assume that you’re using our STEVAL_ISC005V1 board and what you call ‘PDO1’ is Vsnk from the schematic.

    However, Vsnk lights are on for all PDOs selections. Whereas PDO2 is ON if PDO2 is selected and PDO3 if PDO3 is selected.

    Our algorithm always tries to select the highest voltage. If the charger is so that PDO3 can be selected, then PDO3 Vsink will light on,

    However, also PDO2 Vsnk will light ON. If the charger is smaller.

    Best regards

    Ashish Gawade

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ellasmith
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ellasmith
Asked: August 24, 2023In:
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Hello Can I get access to the low-level RF encoder/ decoder on the ESP32- C3? I would like to transfer and receive my own signals applying the 2.4 GHz antenna, outside of the Bluetooth/ wifi protocols. The reason I need to ...Read more

antennabluetoothdecoderencoderesp32rfwifi
  1. vikas Nagpal

    Hello, Yes, the ESP32-C3 microcontroller provides access to the low-level RF encoder/decoder functionality for custom transmission and reception on the 2.4 GHz frequency. The ESP32-C3 is equipped with a Wi-Fi/Bluetooth subsystem, but it also supports other communication modes, such as RF communicatiRead more

    Hello,

    Yes, the ESP32-C3 microcontroller provides access to the low-level RF encoder/decoder functionality for custom transmission and reception on the 2.4 GHz frequency. The ESP32-C3 is equipped with a Wi-Fi/Bluetooth subsystem, but it also supports other communication modes, such as RF communication using the RF module.

    To use the RF module for your application, you would typically need to bypass the higher-level protocols like Wi-Fi and Bluetooth and directly control the RF interface. The ESP32-C3 provides a general-purpose radio (RF) peripheral that can be used for this purpose.

    Thank You

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Julian White
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Julian White
Asked: August 22, 2023In:
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Dear, I am trying to test voice recognition with TW001- VUIA6E1POCZ. However, in the end, I am facing an error as follows. Could you let me know why it happened? And please, let me get the latest DSpotterSDK. The communication shows me the version as” Nov 1, 2021″.Thanks.

ra6e1testtw001voicevuia6e1pocz
  1. nidhi singh

    Hi there, You can follow the below steps to reactivate the software license. (Note that you also can use the same procedure to reactivate your kit when this kind of issue happens again) Step 1 Use Segger J- Flash Lite to erase the chip. Step 2 Use Segger J- Flash Lite to program the corresponding s-Read more

    Hi there,

    You can follow the below steps to reactivate the software license. (Note that you also can use the same procedure to reactivate your kit when this kind of issue happens again)

    Step 1 Use Segger J- Flash Lite to erase the chip.

    Step 2 Use Segger J- Flash Lite to program the corresponding s- record image file. The ZIP file below contains the image file for RA6E1- VUI kit( TW001- VUIA6E1POCZ). zip

    Step 3 Extract the Zip file below to get the CyberonLicenseTool and execute it.

    Software License RecoveryTool.zip

    Step 4 In the tool pane, select the”CybServer_RenesasWWPromo_Recovery. bin”, which is also provided by the above Zip file, in the first configurable window.

    Step 5 Then, fill up the correct UART settings in the second configurable window. You can check out Device Director to get the correct COM port number, which should be assigned to JLink CDC UART Port.

    Step 6 Click the launch button. Then, you should get the communication as same as below.

    Step 7 Press the onboard S2 Reset button( should be a red color button). also, you should get the communication as same as below.
    *** When you find the communication of” License data OK”, the reactivation process is done successfully. ***

    Step 8 Before you close the tool, you can try speaking to the device using Wake- up command” Hey Siri”. Once the program reacts to your voice command, it means the license confirmation process is passed.

    Step 9 Close the license programming tool and reboot your device. After that, you can use Tera Term to test the device.

    NOTE For doing this process, there’s no extra hardware connection needed except the single USB connection between your computer and the onboard micro USB connector J6.

    Thanks,

    Nidhi

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