Adding an ADC to the Raspberry Pi app note (PDF!) from FTDIChip: This application note will show how to connect the RPI-Hub-Module to the Raspberry Pi and install FTDI drivers to control the module. The application note will then explain how the module may be used to read values from an external ADC device over the SPI […]
Category Archives: app notes
App note: USB HID bootloader for PSoC 3 and PSoC 5LP
An application note on USB HID bootloader for PSoC 3 and PSoC 5LP from Cypress: AN73503 describes how to implement a USB bootloader for PSoC 3 and PSoC 5LP devices by using the USB Human Interface Device (HID) class. It also shows how to build a Windows-based USB host program. A PSoC Creator project and an […]
App note: Demodulating communication signals of Qi-compliant low-power wireless charger using MC56F8006 DSC
Demodulating the Qi standard wireless power charger app note(PDF) using MC56F8006 digital signal controller from Freescale Semiconductor. Wireless power is becoming more and more popular today, through which a number of electronic items like mobiles, laptops, media players, can be charged without cords or wires. It is beginning to show great potential in the consumer […]
App note: Low-power wireless charger transmitter design using MC56F8006 digital signal controller
An app note(PDF) from Freescale Semiconductor on 5-16V, free positioning multiple primary coils “Qi” compatible wireless power transmitter. Wireless power transmission system transfers electrical power from transmitter to receiver without any wire connection. Due to safety, freedom, reliable, convenient and long life, wireless charging is popular, and widely used in everything such as toothbrushes, LED […]
App note: Building a battery operated auto ranging DVM with the ICL7106
Intersil’s application note (PDF!) on building a battery operated auto ranging DVM with the ICL7106: This application note describes a technique for auto-ranging a battery operated DVM suitable for panel meter applications. Also, circuit ideas will be presented for conductance and resistance measurement, 9V battery and 5V supply operations, and current measurement.
App note: Infrared gesture sensing
An application note from Silicon Labs on Infrared gesture sensing (PDF!): Touchless user interfaces are an emerging trend in embedded electronics as product designers seek out innovative control methods and more intuitive ways for users to interact with electronics. Active infrared proximity motion sensing can solve this challenge. Silicon Labs Si114x proximity and ambient light sensor products […]
App note: Output current sensing for the MC07XS6517 and MC17XS6500 eXtreme switch devices
An app note(PDF) from Freescale Semiconductor This document describes the current sense performance of eXtreme switches, and describes the enhanced current sense mode dedicated for low current loads, such as light emitting diodes (LED). This application note also presents the accuracy for 7.0 mOhm and 17 mOhm channels, and the practical implementation of a calibration […]
App note:Coils used for wireless charging
An app note(PDF) from Freescale Semiconductor on wireless charging coil designs There are many battery-powered devices, which need to be periodically charged, such as mobile phones, tablets, and battery-powered hand tools. These tools are usually charged by a dedicated cord from a USB port or from a dedicated wall adapter. Wirelessly transferred power simplifies the […]
App note: Lateral mosfet design recommendations for audio amplifiers
Semelab’s application note on lateral mosfet design recommendations for audio amplifiers: Semelab’s range of lateral mosfets has been specifically designed for audio power amplifiers and there are a number of advantages that they exhibit over bipolar transistors in these applications. This application note is intended to highlight these differences and give design guidelines in using the mosfets for […]
App note: Thermal consideration of flash LEDs
LEDs maximum performance are primary determined by its thermal property stresses, See OSRAM’s app note(PDF). This application note focuses on how to develop an adequate thermal management for LEDs in camera flash applications.
Free PCB Sunday: Pick your PCB
We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will […]
App note: Common-Mode transients in current sense applications
Transient considerations in current sensing especially in motor and solenoids, app note(PDF) from Analog Devices. Current sense amplifiers are used in a variety of applications, such as motor or solenoid control, load current monitoring, and fault detection. In such applications, it is typical for the input common-mode voltage to swing from ground to a certain […]
App note: FPGA configuration from SPI Flash memory using a Microprocessor
From Xilinx application note on FPGA configuration method: This application note describes a simple and efficient FPGA configuration method that utilizes a microprocessor to configure an FPGA device from a Serial Peripheral Interface (SPI) flash memory. This method reduces hardware components, board space, and costs. Reference hardware design and firmware are included to illustrate the methodology.
App note: Medium power small-signal MOSFETs in DC-to-DC conversion
App note(PDF) from NXP on DC-DC medium power small-signal MOSFETs. This application note explores different methods of DC-to-DC conversion. It includes some examples of DC-to-DC down-converters using small-signal MOSFETs.
App note: SD(HC)-memory card and MMC interface conditioning
An ESD and EMI protection app note(PDF) from NXP for SD and MMC memory interfaces. This document gives an overview about different ESD protection and EMI filter devices optimized for SD-memory card and MMC interfaces. These devices cover the range from 1-bit to current standard 4-bit (SD-memory card, SD 2.0) or 8-bit (MMC) high-speed memory […]
App note: Energy Harvesting reference design user’s guide
An application note from Silicon Labs on energy harvesting reference design user’s guide(PDF!): The purpose of this reference design is to demonstrate an ultra low power wireless sensor, powered from an energy harvesting source. This application is typical of systems which wake periodically to measure and transmit results. Since it is powered from an energy harvesting […]
App note: EMI and ESD filtering of audio interconnects
App note(PDF) on NUF2441FC EMI and ESD filter chip from ON Semiconductor. The continued ever-increasing integration of more functions into personal electronic devices such as cell phones has made electronics manufacturers demand more integrated functions to reduce part count and save board space. Cell phone manufacturers have also driven component manufacturers to produce more efficient […]
App note: Analog switches solve many problems within a cell phone
Applications(PDF) of analog switches inside a cell phone by ON Semiconductor. Analog switches have been available since the 60’s as a component for systems designers. With the advent of ASICs and ASSPs, many designers have not experienced the real value of these devices. Today’s designers may be familiar with the venerable MC14066, a workhorse that […]
App note: Li-Ion/Polymer Shunt battery charger system with low battery disconnect
Li-Ion/Polymer Shunt battery charger system with low battery disconnect (PDF!) app note from Linear Technology: The LTC®4071 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. A near zero current low battery latching disconnect function protects even the lowest capacity batteries from deep discharge and potentially irreparable damage. The 550nA […]
App note: 1-Wire communication with PIC microcontroller
An application note (PDF!) from Microchip on 1-Wire communication with PIC microcontroller: This application note introduces the user to the 1-Wire® communication protocol and describes how a 1-Wire device can be interfaced to the PIC® microcontrollers. 1-Wire protocol is a registered trade mark of Maxim/Dallas Semiconductor. A software stack for the basic, standard speed, 1-Wire master communication […]