rsdio tipped us to some interesting parts and application notes: MAX13450E, MAX13451E RS-485 Transceivers with integrated termination Resistors It’s my goal to some day finish a DMX512 dimmer board that I started, based on the PIC16F87 and as many LEDs as can be attached to its I/O pins – next task would be a DMX512 […]
Category Archives: app notes
App note: Interface SDRAM and DDR SRAM with a CPLD
irrenhaus tipped us to demo projects that interface SDRAM and DDR SRAM with CoolRunner-II CPLDs: There is a reference implementation from xilinx how to interface a SDRAM memory from a CoolRunner-II CPLD XAPP394: “Interfacing to Mobile SDRAM with CoolRunner-II CPLDs” and XAPP384: “Interfacing to DDR SDRAM with CoolRunner-II CPLDs”). So my idea was: Why not […]
App Note: Programmable logic controllers (PLCs)
An introduction to programmable logic controllers (PLCs): This tutorial offers an in-depth introduction into programmable logic controllers (PLCs). The article starts with an overview of the history and the role PLCs in factory automation. The basic principles of PLC operation are discussed. The core modules of an industrial-control system are examined: the analog input function, […]
12-Bit analog monitoring and control solution
TI’s AMC7812 has a bunch of high-resolution, high-voltage analog inputs (ADCs) and outputs (DACs). 12, 12-Bit DACs with Programmable Outputs 0V to 5V DAC Shutdown to User-Defined Level 12-Bit, 500kSPS ADC with 16 Inputs 0V to 12.5V (16 Single-Ended or Two Differential + 12 Single-Ended) Two Remote Temperature Sensors One Internal Temperature Sensor Input Out-of-Range […]
MAXQ1004 1-Wire and SPI Authentication Microcontroller
rsdio tipped us to some interesting parts and application notes: MAXQ1004 a 1-Wire and SPI Authentication Microcontroller. Secure Your Application and Save Your Battery with an Authentication Micro That Consumes Only 300nA in Stop Mode Protects your investment with government-grade AES encryption Easily add authentication to your application using one of several interfaces (1-Wire, SPI™, […]
App note: I2C controlled keypad scan IC
The TCS8418 is an I2C controlled keypad scan chip for up to 80 buttons: • Operating Power-Supply Voltage Range of 1.65 V to 3.6 V • Supports QWERTY Keypad Operation Plus GPIO Expansion • 18 GPIOs Can Be Configured into Eight Inputs and Ten Outputs to Support an 8 × 10 Keypad Array (80 Buttons) […]
C2000 Piccolo: F2806x MCU
rsdio tipped us to the floating-point Piccolo MCUs from Texas Instruments: C2000™ Piccolo MCUs offer an enhanced math engine specifically designed to simplify programming and optimize performance in real-time control applications that may require integrated communications. Developers of energy-efficient motor control and renewable energy applications can now use a single F2806x MCU to cost-effectively execute […]
Introduction to computed tomography (CT) medical imaging
rsdio tipped us to an app note on a computed tomography (CT) medical imaging. This tutorial explains how computed tomography (CT) imaging systems generate 3-D images of internal body structures. The high-end spiral CT technique is explained, as is the method by which light collected from photodiodes is processed into an electrical signal and eventually […]
App Note: LEDs allow new remote-controlled lighting applications
A remote-controlled lightning applications: One benefit LEDs offer in general lighting applications is that they are easier to control remotely. This application note describes a remote-controlled architectural or street-lighting system and describes how to implement power-line or wireless communications control of a lighting system. Thanks for the tip rsdio!
App Note: Overview of industrial motor control Systems
An overview of industrial motor control systems: This overview of industrial motor controls highlights the differences and subsystems for DC motor, brushless DC, and AC induction motors. An in-depth analysis of critical subsystems focuses on monitoring and measuring current; sensing temperature; sensing motor speed, position, and movement; monitoring and controlling multichannel currents and voltages; and […]
Introduction to magnetic resonance imaging (MRI)
rsdio tipped us to an app note on magnetic resonance imaging (MRI). This tutorial explains how magnetic resonance imaging (MRI) systems use the reaction of hydrogen atoms moving in a magnetic field to yield a detailed medical image. The types of magnetic fields typically used are described. The note explains why today’s higher resolution MRI […]
Building an engineer
Jeremy presented what it really means to be an engineer. We all know that engineers build things, but what does it take to build an engineer? In this video, I talk about my open source hardware projects, how I became an engineer, and how I work to get other people involved with engineering and science. […]
App note: Digitally controlled DC/DC converter
A digitally controlled DC to DC converter: You can easily add margining capability (digital adjustment of the output voltage) to a DC/DC converter by adding a 2- or 4-channel, I²C-adjustable current DAC (DS4402 or DS4404) at the converter’s feedback input. Because each DAC output is 0mA at power up, the extra circuitry is transparent to […]
Design a DC to DC switchmode converter
EEVblog has a new video on switchmode DC to DC converters using an MC34063. Via the computer controlled power supply thread in the forum.