68HC11 68HC811 applications and schematics
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Electronic TIC TAC TOE
This project is not to introduce Tic Tac Toe. Everyone knows this game. It is to introduce two features: bi-coloured LEDs, microcontrollers, and the skill of writing an ALGORITHM. You can use the project to learn the skills of creating...
How to Design Battery Charger Applications that Require External Microcontrollers and Related System-Level Issues
Application note on designing linear and switch-mode (switching DC-DC converter current source) battery charger applications that require external microcontrollers and related system-level issues for notebook computers.
The application note provides guidance on the design of both linear and switching DC-DC converter...
delay circuit for photography
This article outlines the construction of a simple microcontroller-based delay circuit designed for photographic applications such as drop or high-speed photography. It can control the trigger lag of cameras and flash units, generate periodic trigger pulses, or manage magnetic valves....
AirBorn Electronics project
Embedded system design engineers create examples of their work from the 1990s era.
Embedded systems have evolved significantly since the 1990s, and the design work from that period reflects the technological limitations and innovations of the time. Engineers in this field...
Microcontroller Backup Thin Film Batteries
Cymbet Corporation provides rechargeable solid-state batteries designed for advanced microcontroller power backup applications. The company is recognized as a leader in thin-film energy storage technology.
Cymbet Corporation's rechargeable solid-state batteries are engineered to deliver reliable power solutions for microcontrollers, which are...
ON/OFF button using Microcontrollers
Using a switch to power up your microcontroller projects may not be a good idea if you need to "wake" the PIC during some events. For example: A metal detector sends a pulse indicating a car is ready to enter...
IR On/Off Switch Using Microcontroller
Turning electrical devices ON or OFF using a remote control is a well-established concept, with numerous devices available that perform this function effectively. To create such a device, it is necessary to construct a receiver and a transmitter, as well...
QCard Controller 68HC11 Processor
The QCard Controller Single Board Computer (SBC) features the Freescale 68HC11 microcontroller, along with RAM and Flash memory, digital input-output (I/O), and analog-to-digital (A/D) conversion capabilities. For comprehensive details regarding the QCard headers mentioned on this page, refer to the...
DIAL ALARM-1
This is the lowest cost dialing alarm on the market and shows what can be done with an 8-pin microcontroller. The complete circuit is shown below. You cannot see all the features of this project by looking at the circuit...