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Scanning 7-Segment & KeypA - D - Since the output buffer ofP1 can sink 20mA (each output pin, but maximum IOL for all outputs was limited at 80mA) , thus we can use P1 to drive LED display directly. As shown in the circuit, Two common-anode 7-segment LEDs are connected to P1 with 180 Ohms current limiting resistor. Each segment of two LED __ Designed by Wichit Sirichote
Scheme implements multiple output ports - 02/16/98 EDN-Design Ideas - In µP/µC systems, you sometimes need to use many output ports and update all the ports simultaneously. For instance, in systems that use multiplexing techniques, the output ports require refreshing for every scanning period. One example is a system of multiple dot-matrix LEDsFile has many circuits, scroll to find this one Design by W Kurdthongmee, Nakorn Si Thammarat, Thailand
Scheme speeds access to µP's real-time clock - 06/05/98 EDN-Design Ideas - (Scroll to find this circuit) The DS5000T (Dallas Semiconductors, www. dalsemi. com) is an 8051-compatible processor that integrates nonvolatile memory and a real-time clock. This module has an impressive set of functional extensio Design by Jerzy Chrzaszcz, Warsaw University of Technology, Warsaw, Poland
Schoolies Amp - This 20W audio amplifier module sounds great and is dead easy to build!__ SiliconChip
SD Memory Card Interface - SD memory cards, especially the ones under 1GB are cheap, relatively easy to interface and provide vast amounts of memory for imbedded control. __ Designed by Luhan Monat - Mesa Arizona
SD/SDHC Card Interfacing with ATmega8 /32 (FAT32 implementation) - Hi friends, Here is my project on interfacing of SD Card (microSD) . microSD cards are available very cheap nowadays, a great option for having a huge memory in any embedded system project. It is compatible with SPI bus, so the interfacing is easy.
Sealed Jar Lamp - PIC Project This device uses 2 AA alkaline batteries to power a 1 watt LED. It has 4 power levels, plus on/off, and can run either side up. The jar light is entirely sealed with no external switches. An internal mercury switch controls all of the modes of operation. It will work under water. All components are mounted directly to the circuit board (mouse over image above) . A small piece of 1/4 inch board is glued to the inside of the lid. The circuit board is fastened to this with 2 small wood screws. Nothing penetrates the lid. __ Designed by Luhan Monat - Mesa Arizona
Secured Room Access SystE - M - Security is a prime concern in our day-to-day life. And access control system forms a vital link in a security chain. The microcontroller-based digital lock presented here is an access control system...__ Electronics Projects for You
Security KeypA - D - This Electronic Code Lock uses a 12-keys keypad is used to enter a password and open an electrick lock or any other device with a signal. Uses an 8-pin PIC 12F629. __ Designed by Jose Pino
See & Speak using Raspberry Pi - Imagine a machine that can see and speak, and is fully portable. It is surprising, right? In this article, we present a system based on Raspberry Pi, or Raspi, that can...__ Electronics Projects for You
Selection of Integrated Audio Amplifiers - In a previous article I discussed building audio amplifiers using discrete transistors. While it is possible to build good audio amplifiers from discrete transistors, they are no match for the many audio amp IC's available to us. IC's offer many advantages including high efficiency, high gain, low standby current, low component count, small size and , of course, low cost. It is little wonder that audio amp IC's have replaced discrete transistors in most consumer electronic devices. While __ Designed by Mike Martell N1HFX
Self-powered phone messenger - I always keep one totally self powered phone (the way they all used to work) in case of a power failure. This device works the same way, taking all of its power directly from the phone line. __ Designed by Luhan Monat-Mesa Arizona
SemTest: a Discrete Semiconductor Test Set; Pt.1 - Check all those semiconductors in your collection with this easy-to-build test set!__ SiliconChip
SemTest: a Discrete Semiconductor Test Set; Pt.2 - Check all those semiconductors in your collection with this easy-to-build test set!__ SiliconChip
SemTest: a Discrete Semiconductor Test Set; Pt.3 - Now that we have looked at the full circuit of our new Discrete Semiconductor Test Set, it's time to describe its construction and the setting-up procedure. We also describe how to fit a crowbar circuit to quickly discharge the HT after making high-voltage measurements.__ SiliconChip
Serial Comms to LED Driver - This document describes the HSETI PCB. This PCB is a small simple application for the Atmel AT89C2051 microprocessor - a 20 pin 8051 variant, with FLASH (reprogrammable) program memory. The board has just two chips on it, the CPU and a driver/buffer.__ Airborn Electronics, Australia
Serial COMs to LED driver - This document describes the HSETI PCB. This PCB is a small simple application for the Atmel AT89C2051 microprocessor - a 20 pin 8051 variant, with FLASH (reprogrammable) program memory. The board has just two chips on it, the CPU and a driver/buffer. __ Airborn Electronics, Australia
Serial I/O Controller & Analog Sampler - It connects to your PC's serial port and can switch relays according to voltage, resistance, temperature and digital inputs. It also includes system timers and can be operated as a PLC-style controller__ SiliconChip
Serial input 4 Digit Readout - PIC Project This device uses an LTC4625 4 digit LED display (with RH decimal points) , along with 2 extra LED's. It requires only 5 volts, TTL serial input, and Ground on a 3 pin connector. Note: the connector is mounted with the pins sticking out the back side to allow for mounting flush against a (transparent) front panel. __ Designed by Luhan Monat - Mesa Arizona
Serial LCD controller using a PIC16F628 - Schematic only, no circuit description included
Serial LCD Controller using Microchip PIC16F628 - Microcontroller based electronic circuit
Serial LCD for microControllers using only 3 pins - Connect an LCD to your microcontroller to make it easy to develop and debug your application. You can choose which PIC I/O pins you want to use for the interface, and any HD44780 compatible LCD can be controlled. __ Designed by Peter Jakab
Serial to Parallel Converter using the AT89C2051 - This page describes a serial to parallel converter that was originally included as part of our PG2051 evaluation kit. It is a basic serial to parallel converter written in 8051 assembler, and is written in the format of an example or tutorial. The circuit, gerbers and software - everything you need to build the project - are here. It would be hard to get a serial to parallel converter much simpler than the single 20 pin IC in this circuit.__ Airborn Electronics, Australia
Serial to parallel converter using the AT89C2051 - Microcontroller based electronic circuit__ Airborn Electronics, Australia
Serial to PIC Interface - One of the first things I like to do when creating a new project is to get the I/O working. This helps in debugging the code as I write it. What about projects that do not have I/O? This device sneeks both input and output from your computer (terminal program) to the PIC using just one pin. __ Designed by Luhan Monat - Mesa Arizona
Serial Voltmeter using the PIC16C71 - Building a serial voltage meter to measure from 0 to 5 volts DC is actually pretty easy. Using MeLabs PicBasic, and Microsoft's Visual Basic Version 5 Pro. You need Visual Basic Pro version because you will have to use Basic's MSComm control. This control is not available in the Visual Basic 5 "Learning" Edition. The PIC16C71 simplifies the task even more by having a built in A/D converter. Pins 17, 18, 1, 2 are the analog inputs AIN0, AIN1, AIN2, AIN3 respectively.
Series Resistors, Body Capacitance Scan 16 Buttons with Two MCU Pins - In an application using a pin-limited microcontroller (MCU) , I needed to scan an array of 16 buttons. The technique I used involved a series string of resistors of identical value connected between two bidirectional pins of the __ Designed by Dave Vanden Bout
Seriously Bright 20W LED Floodlight - Last February, we published a DIY 10W LED Floodlight, which has been enormously popular. We said that one was almost blinding - but to paraphrase Croc Dundee, that's not bright. THIS one is BRIGHT!__ SiliconChip
Setup Tests Bit-Error Rate - 03/18/04 EDN-Design Ideas - Traditionally, the reception quality of a digital receiver is expressed in terms of BER (bit-error rate]. This figure is the proportion of received bit errors in a given period. Typically, you measure the BER in the lab by applying an RF signal, modulated by a pseudorandom code, to the receiver under test Design by Israel Schneiderman
SHARP to RS232 Serial Converter - This document details how to build your own SHARP palm-top/hand-held to RS232 serial converter. In summary, this device allows the SHARP range of hand-held computers and pocket organisers to be interfaced to (almost) any computer which has an RS232 serial port i. e. IBM-PCs (or compatibles) , Amigas, SUNs, other UNIX machines, etc __ Designed by Andrew Woods
Shielded Loop AntennFor DX AM Reception - Dramatically improve your AM reception with this tuned loop antenna. It's just the shot for remote areas & for minimising interference.__ SiliconChip |
