ELECTRONIC COURSE

Monday, 9 November 2009

PONYPROG by Claudio lanconely

If you are looking for a simple but powerful programmer you are right, it's here.
PonyProg is a serial device programmer software with a user friendly GUI framework available for Windows95/98/ME/NT/2000/XP and Intel Linux. Its purpose is reading and writing every serial device. At the moment it supports I²C Bus, Microwire, SPI eeprom, the Atmel AVR and Microchip PIC micro.
SI-Prog is the programmer hardware interface for PonyProg.
With PonyProg and SI-Prog you can program Wafercard for SAT, eeprom within GSM, TV or CAR-RADIO. Furthermore it can be used as a low cost starter kit for PIC and AVR.

click HERE
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Saturday, 29 August 2009

USB to I2C Adapter

..Model JI-300
USB to I2C Adapter

Features
Programmable SCL clock frequency from 255Hz to 3.8Mhz (20nS steps)
Variable bus voltage from 1.50V to 5.25V (10mV steps)
Supports Master and multi-Master operation
Software selectable bus pull-up resistors (16 values including open)
USB 2.0 host interface
Switched target bus voltage at connector

Low I2C bus capacitance (<40pf href="http://www.jupiteri.com/index.html">Jupiter Instruments www.jupiteri.com
Updated on 7/13/09

The JI-300 is a versatile, easy to use, PC hosted adapter used to drive I2C communications
to/from a target bus. The desktop unit can be configured to interface a variety of I2C
networks. Bus parameters such as clock frequency, duty-cycle, setup and hold times, bus
voltage, and pull-up resistor values can be varied. JI-300’s diagnostic features including
“excessive clock-stretch”, “bus-not-free”, and “bus contention” monitoring, as well as status
reporting at the conclusion of each message transaction simplifies I2C trouble-shooting. A
Windows software application manages the setup and control of the instrument.
Communications and unit power is provided via a USB 2.0 connection.visit:www.jupiteri.com.

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Friday, 28 August 2009

XTal tester circuit

SIMPLE X-tal tester

This is a simple XTal tester circuit. T1 and XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the XTal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and LED will light. The circuit is suitable to test 100KHz - 30MHz Xtal.

Would you like to discuss about it?
Leave a post in the forum at www.newcircuits.com

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AUDEO VIDEO TRANSMITTER

VHF Audio Video Transmitter

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The circuit presented here is a simple audio/video transmitter with a range of 3 to 5 metres. The A/V signal source for the circuit may be a VCR, a satellite receiver or a video game etc. A mixer which also operates as an oscillator at VHF (H) channel 5 TV frequency is amplitude modulated by video signal and mixed with frequency mo enna, contains video carrier frequency of 175.25 Mhz and audio carrier frequency of 180.75 Mhz. Then, the transmitter is a B-System of CCIR compatible.

The circuit consists of transistor Q1 with its resonant tuned tank circuit formed by inductor L1 and trimmer capacitor VC1, oscillating at VHF (H) channel 5 frequency. Transistor Q2 with its tuned circuit formed using SIF coil and inbuilt capacitor forms oscillator. The audio signal applied at the input to Q2 results into frequency modulation of 5.5 Mhz oscillator signal. The output of 5.5 Mhz FM stage is coupled to the mixer stage through capacitor C8 while the video signal is coupled to the emitter of Q1 via capacitor C4 and variable resistor Inductor L1 can be wound on a 3mm core using 24SWG enamelled wire by just giving 4 turns. Calibration/adjustment of the circuit is also not very difficult. After providing 12V DC power supply to the circuit and tuning your TV set for VHF (H) channel 5 reception, tune trimmer VC1.

Would you like to discuss about it?
Leave a post in the forum.

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Thursday, 27 August 2009

AVR IN SYSTEM PROGRAMMING SCHEMA

AVR910: In-System Programming
Features

• Complete In-System Programming Solution for AVR Microcontrollers
• Covers All AVR Microcontrollers with In-System Programming Support
• Reprogram Both Data Flash and Parameter EEPROM Memories
• Complete Schematics for Low-cost In-System Programmer
• Simple Three-wire SPI Programming Interface
Introduction

In-System Programming allows programming and reprogramming of any AVR microcontroller
positioned inside the end system. Using a simple Three-wire SPI interface,
the In-System Programmer communicates serially with the AVR microcontroller,
reprogramming all non-volatile memories on the chip.
In-System Programming eliminates the physical removal of chips from the system.
This will save time, and money, both during development in the lab, and when updating
the software or parameters in the field.
This application note shows how to design the system to support In-System Programming.
It also shows how a low-cost In-System Programmer can be made, that will
allow the target AVR microcontroller to be programmed from any PC equipped with a
regular 9-pin serial port. Alternatively, the entire In-System Programmer can be built
into the system allowing it to reprogram itself.
The Programming Interface
For In-System Programming, the programmer is connected to the target using as few
wires as possible. To program any AVR microcontroller in any target system, a simple
Six-wire interface is used to connect the programmer to the target PCB. Figure 1
below shows the connections needed.
The Serial Peripheral Interface (SPI) consists of three wires: Serial ClocK (SCK), Master
In – Slave Out (MISO) and Master Out – Slave In (MOSI). When programming the
AVR, the In-System Programmer always operate as the Master, and the target system
always operate as the Slave.
The In-System Programmer (Master) provides the clock for the communication on the
SCK Line. Each pulse on the SCK Line transfers one bit from the Programmer (Master)
to the Target (Slave) on the Master Out – Slave In (MOSI) line. Simultaneously,
each pulse on the SCK Line transfers one bit from the target (Slave) to the Programmer
(Master) on the Master In – Slave Out (MISO) line.
8-bit
RISC
Microcontroller
Application
Note Read More.. Read More..

Wednesday, 26 August 2009

BUILD MICROCONTROLLER PROJECT

Build Your Own Microcontroller Projects
PRAKTEK MERAKIT POYEK-2 MICROCONTROLLER

Wichit Sirichote, kswichit@kmitl.ac.th
Department of Applied Physics, Faculty of Science,
King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, THAILAND

This page provides schematic and software for hobbyists to practice "learn by doing", build a simple microcontroller projects at home. For those who would like to contribute projects, please prepare HTML files and send it to me.