Introduction The DigiThermo is a device designed for measuring time and temperature used in chemistry laboratory. The circuit of Digithermo employs a 89C4051, 20-pin CMOS Microcontroller with built-in 4kB code memory. Temperature was measured by LM35D, National Semiconductor Temperature sensor producing 10mV/°C. The CA3162, 3-digit DVM converts dc output provided by LM35D and sends BCD […]
DigiThermo 0-100.0 °C using AT89C4051 Read More »
Builda digital clock that turns AC load on/off with preset time. sourcecode with sdcc for 8051. The Clock Controller V1.1was designed to be an exemplary of using ‘C’ language to control timer0interrupt, 7-segment LED and keypad scanning. It provides 1-bit sink currentdriving output, for driving a relay, opto-triac, say. Many projects requiring7-segment display and keypad interfacing
Clock ControllerV1.1 using AT89C2051 Read More »
Introduction The Saver V5.0 runs simple clock emulation program, turns a night light on and off with preset time, say 19:00 to 22:00 everyday. The design features low cost, easy installation, no battery backup and no EMI. The AT89C2051 uses external oscillator generated by schmitt trigger gate CD4093, ~680kHz. Reference frequency was derived from 50Hz
Night Light Saver V5.0 using AT89C2051 Read More »
Learn yourself, how to write a simple program using Clanguage for the 89C2051/89C4051. Write a C source program, compile,and download the HEX code to the chip directly, connect DC adapter, seewhat happen after power up the board. No need ICE, in-circuit programmer,everything can be made by yourself easily. Introduction This page was provided forBeginnerswho interested
Experimenting the 2051 withC Programming using 89C2051 Read More »
The upgraded part is only the PCB,the software remains the same as in original project which you can findat EasyDownloader V 1.1 Here you have a single side versionof PCB of the Easy-DownloaderV1.1 by WichitSirichote. The board is 10x4cm in a full size. That newPCB has some small modifications comparing to original scheme. It
Very Easy Single-Side PCB forEasy-Downloader V1.1 using 89C2051 Read More »
The EasyDownloader V 1.1 , a Flash Writer for 89C2051/4051 which was designedby Wichit Sirichote, used a Double-SidePCB. I think, it’s difficult to make my ownPCB by myself. So that I decided to design a Single-SidePCB instead. My first prototype board wasmade using hand-writing with a permanent ink pen( see later in Figure 3).This page
MakeYour Own Single-Side PCB for Easy-Downloader V1.1 using AT89C2051 Read More »
Build your own a personal writer forprogramming HEX code into Flash based microcontroller AT89C2051(2k) andAT89C4051(4k). Simple hardware and Easy use software in DOS and Windowversion. Single-side and double side PCB files included.sourcecode with sdcc version! Introduction The first version of the Easy-Downloaderwas designed in 1997 to be used as a tool for my students on
Easy-DownloaderV1.1 for ATMEL89C2051 Read More »
Complete schematic, orcad pcb layout of Easy-Downloader V1.1 and modified firmware with sdcc. I am very happy to use sdcc for writing firmware of my project. The compiled code is very compact and nice. After I succeeded writing a new firmware of xtimer and Easy-downloader V1.1 with sdcc. I cannot stop preparing a new page
Easy-Downloader V1.1 with SDCC using AT89C2051 Read More »
This single sided proto board provides an economical solution for developing and testing the projects around Atmel 20 pin series u-controllers (89Cx051 & AVR) Figure 1 shows the circuit diagram of proto board. All port connections are available for user interface around the proto area including the power supply pins. MAX232 serial driver is used
AT89C2051 PROTO BOARD Read More »
My wife asked me to find another timer for using in the kitchen. She got one already with analog setting, but it needs one AA size battery. Digital setting may not easy for human interface. However I will make it for easy time setting. When I am free I will modify it to be analog
xTimer V1.0 using AT89C4051 microcontroller Read More »
