USB Switch USB3740 (SR)
Hello,currently I am working on a design that uses a USB3740. From the datasheet I understand that it incorporates two analog switches. In the PCB layout I have to cross DP and DM lines on each port so...
View ArticleHow to use an USB bridge to SDcard USB2241 in an embedded system (hermallorn)
Hi,I want to share data on a SDcard between my embedded MCU (PIC32MZ) and a host PC throught USB.I don't want to access the SDcard thought the MCU because it is really busy so I thought i should use a...
View ArticleController to access SD card of datalogger via USB (ralfiii)
Hi there!My data logger devices store measurement data on an SD card. I use a PicoPower Atmel ATSAM4LS8BA uC and it runs with a single AAA cell for one week and generates around 100MB pre-compressed...
View ArticleFull Bridge Unfolding Circuit (ashvin)
Hi,I used a controller dsPIC33FJ16GS504 for on gird solar-microinverter, in my hardware part when I applied input (24-dc battery not a solar panel), also connect lamp of 300 W as a load, and applied a...
View ArticleMCP1642 startup voltage (buzz53)
I am evaluating the MCP1642D-50 for use in what seems a classic application: powering a Raspberry PI Zero and shield from 1 or 2 AA Energiser lithium cells. It works very well except that the minimum...
View ArticlePI compensator implementation in microcontroller and calculation for that...
Hi,I used a microcontroller dsPIC33FJ16GS504 for on grid microinverter. In compensator design circuit (attached) current compensator block I want to implement in microcontroller in which PI compensator...
View ArticleMCP4361 strange dout behaviour (Denge)
Hi All,In the first picture one can see the SPI clock against the CS/ and the second picture shows the the DOUT (miso) of the potentiometer chip.The strange thing is the trailing edge (!?) which shows...
View ArticleMCP616 OpAmp (phaedrus)
Hello,I am using the MCP616 as a unity gain (buffer). For the purpose of trial I am using a 3.3V supply. I have a 10k potentiometer connected to the 3.3V from which I am feeding a varying voltage into...
View ArticleMCP1640B High Failure rate (twchia)
Good day,I am using the MCP1640B to produce a 5V analog supply from a Lithium battery.There is a 5K trimmer to allow fine tuning of the 5.000V output.It is designed such that the output voltage is able...
View ArticleMCP3903 SPI (Luke)
Hi, I hope this is the right place to post this. If it belongs somewhere else I can move it. I am have a PCB with 3 MCP3903 AFEs which are connected to a CC3200SF Microcontroller. I believe that I have...
View Articlechargin IO - MCP73832T-2DFI/OT - DF meaning (lupal)
Hi all,I would like to find out what DF stands for in MCP73832T-2DFI/OT component type.Datasheet does not mention it.Does anyone have experience with it?Thank you...
View ArticleMCP2221A Behaviour after NACK? (SpiderKenny)
I have a board using the MCP2221A USB-I2C Interface.The I2C Interface is connected to a Newhaven NHD-0216CW-AB3 Character OLED Display Module Ocasionally the display will NACK a command or address byte...
View ArticleMIC5309 LDO Bias pin (kurtclark)
I'm unable to understand the function of the bias pin.I intend to use the 1.2 and 1.8V versions of the LDO. This is not a battery operated application.My input voltage would be around 3.3V, can I just...
View ArticleUse CAP1293 controller as a capacitance-to-ditigal converter (lpellegrini)
Hi All,I would try to use the CAP1293 as a simple capacitance-to-digital converter, not as capacitive button controller, even if specifically designed for this case.I need to detect water presence...
View ArticlePractical (active) Fly Back Converter (ashvin)
Hi Sir,My question is that why in every active clamp or simple fly back converter needs a current feedback for proper switching of fly back MOSFET? Without current feedback in fly back converter we...
View ArticleMCP2210 (Frozen Lucario)
Hi, I would like to develop a Windows software using MCP2210 that configures only the GPIO pins through USB protocol.Am considering between C++/Python coding, any API library(ies) that is required for...
View ArticleDisable self-recalibration in CAP1293 capacitive touch sensor controller...
Hi All,I'm develping an application where I need to detect the presence of water inside a tank. I started the project using the CAP1293 controller that makes a continuous self-recalibration, based on...
View ArticleWaterl level detection with CAP1293 capacitive sensor controller (lpellegrini)
Hi All, I'm develping an application where I need to detect the presence of water inside a tank. My goal is not to measure the exact water level, but simply to detect if the tank is full or not. I...
View ArticleMCP2221A Flash memory permanently locked (ardnew)
While developing a driver for the MCP2221A, I was apparently making a mistake in the formatting of the USB HID flash-write chip-settings command. Now I find that the flash memory is "permanently...
View Articlesolar microinverter: operational amplifier related question (ashvin)
hello, i refer a microchip document AN1444, in which one circuit "AC VOTLAGE SENSE CIRCUITRY" (page no 14 figure:16 on AN1444) which is attached to this post. but i have one query related to that is...
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