Locally broadcast your cell phone through FM band using MAX2606 from Maxim. App note can be found here. This design idea presents an integrated IF voltage-controlled oscillator (VCO) that can retransmit the audio signal from a cell phone to the FM broadcast band. By placing the cell phone’s speaker near the microphone, the user can […]
Tag Archives: app note
App note: Biasing and decoupling op amps in single supply applications
Op amps needs dual supply in order to get a full output swing from its input fed signal, here’s a good app note from Analog Devices on powering op amps using only a single supply. Battery-powered op amp applications such as those found in automotive and marine equipment have only a single available power source. […]
App note: Power supply layout and EMI
Reduce EMI by determining large alternating currents carrying areas and making them compact, this minimizes radiation and spilling of unwanted signal to other part of your PCB. More of these methods are shown from Linear Technology’s app note. PC-board layout determines the success or failure of every power supply project. It sets functional, electromagnetic interference […]
App note: Measuring temperature with PIC16F84A WDT
Here’s an app note from Microchip on how you can use the watch dog timer of an old trusty PIC16F84A as temperature sensor. Almost all temperature sensor circuits use some form of discrete component (such as a thermistor or a solid-state sensor) to actually measure the environment?s temperature. It is left to the microcontroller to […]
App note: Selecting the Optimum Voltage Reference
An application note from Maxim giving you hints when selecting voltage references on your designs. What could be more basic than a voltage reference—a simple, constant reference voltage? As with all design topics, there are tradeoffs. This article discusses the different types of voltage references, their key specifications, and the design tradeoffs, including accuracy, temperature-independence, […]
App note: Low-Cost Shunt Energy Meter using MCP3909 and PIC18F25K20
Here’s a low-cost single phase energy metering solution using Microchip’s MCP3909 metering ADC and PIC18F25K20 8-bit microcontroller. App note can be found here. The meter was tested for a range of current from 0.1A to 20A using the Fluke 6100A Electrical Power Standard. Measurement results are visible on the LCD or on the Pulse Output. […]
App note: Long Delay Generation Using the AVR Microcontroller
Here’s an app note from ATMEL presenting a solution for microcontroller long delays. The solution presented here shows how the AVR AT90 series microcontrollers (AT90S2313, AT90S4414 and AT90S8515) generate and handle long delays. On-chip timers are used without any software intervention, thus allowing the core to be in a low-power mode during the delay. Since […]
App note: Capacitive Multibutton Configurations
A capacitive mutibutton configuration application note from Microchip describing how to scan and detect button presses on more than 4 capacitive buttons. This application note will discuss three different approaches to implementing multiple touch buttons using Microchip microcontrollers. The first approach creates a simple 4 sensor system using the on-chip 4-to-1 analog multiplexers tied to […]
App note: Using the XMEGA external bus interface
Here’s an application note from Atmel describing how to use the external bus interface fount on the XMEGA series AVR microcontrollers. The XMEGA External Bus Interface (EBI) is a highly flexible module for interfacing external memories and memory addressable peripherals such as LCD controllers and advanced communication controllers. The EBI module has four separate Chip […]
App note: Using the CLC module to implement a PCM IR driver
Here is an application note from Microchip describing how to implement pulse code modulation infrared remote control. This technical brief shows how to construct a simple, low-power IR (infrared) remote control transmitter using a PIC16F1708 microcontroller. The remote control transmitter makes use of the Configurable Logic Cell (CLC) and Pulse-Width Modulation (PWM) to create a […]
App note: BLDC control with Hall effect sensors.
Here is an application note from Atmel based on sensor driven BLDC control implemented on AVR microcontrollers. This application note describes the control of a BLDC motor with Hall effect position sensors. The implementation includes both direction and open loop speed control.
App note: Data encryption routines for PIC24 and dsPIC devices
Here’s an app note from Microchip describing how to implement data encryption routines on PIC24 and dsPIC microcontrollers and digital signal processors. This application note discusses the implementation of two of these for PIC24 and dsPIC devices: Triple Data Encryption Standard (TDES) and Advanced Encryption Standard (AES). Source code for this application note is available […]
App note: Getting started guide for the Atmel Lightweight Mesh
Here’s an getting started guide from Atmel describing their Lightweight Mesh wireless protocol. The purpose of this application note is to introduce users to the Lightweight Mesh network protocol stack and typical application development process from Atmel. This document describes how to start quickly with the Lightweight Mesh SDK, by setting up the development environment […]
App note: Implementing a Manchester decoder using the CLC and NCO peripherals
Here is an application note from Microchip describing how to implement a hardware Manchester decoder using the CLC and NCO peripherals found on some of their PIC microcontrollers. The objective of this document is to demonstrate how the NCO and CLC peripherals found on PIC16F devices can be used as a Manchester Decoder. Traditional algorithms […]
App note: Calibration of the ATtiny25/45/85 internal temperature reference
Here is an app note from Atmel describing how to calibrate the ATtiny internal temperature reference. This application note describes how to calibrate and compensate the temperature measurements from the ATtiny25/45/85. It can also be used on other AVR microcontrollers with internal temperature sensors. The temperature measurement is based on an on-chip temperature sensor that […]
App note: Understanding basic sensored BLDC motor operation
Here’s a video tutorial from Texas Instruments describing basic sensored BLDC motor operation. Michael Firth, Motor Driver marketing manager, discusses the basic operation of a BLDC motor.
App note: Understanding common-mode signals
Here is a tutorial from Maxim on common-mode signals. To understand how common-mode signals are created and then suppressed, you should first understand the interaction of shields and grounds in common cable configurations. The following discussion defines a common-mode signal, reviews the common cable configurations, considers shielded vs. unshielded cables, and describes typical grounding practices. […]
App note: Techniques to disable global interrupts
Here is an app note from Microchip describing ways to disable global interrupts. This application note discusses four methods for disabling global interrupts. All discussion will be specific to the PIC16CXXX family of products, but these concepts are also applicable to the PIC17C42.
App note: Protecting 1-wire 5V slaves from overvoltage
Here is a tutorial from Maxim describing how to protect your 1-wire slave devices from overvoltage. If an application requires writing to EPROM devices after deployment, 5V devices need to be protected from overvoltage exposure. This article explains how to have 1-Wire EPROMs and 5V 1-Wire devices on the same bus, if the 5V devices […]
App note: LLC DC DC reference design using dsPIC
Here is a LLC DC DC converter reference design from Microchip using dsPIC digital signal processing capabilities for control. As presented in this application note, resonant converters, LLC resonant converters in particular, have all of the features mentioned above, resulting in a compact and highly efficient design. Their ability to keep the output voltage regulated, […]