Ponyprog Circuit for AVR & PIC16F84

F84 Miniature Real-Time Controller circuit

The F84 MRTC was my second design of a miniature real-time controller. This version uses PIC16F84 running with a low power X-tal 32,768Hz. The scheduler for 6-channel output was saved in EEPROM. No terminal for serial downloading of the scheduler....

AVR-P40-USB-8535 BOARD FOR AT90S8535

There are two ways to program AVR-P40-USB: with ICSP port and with JTAG port. To program via ICSP port you need serial port or parallel port AVR-ICSP programmer dongle (Olimex part # AVR-PG1B or AVR-PG2B). The serial port ICSP programmer...

Serial Programmer for AVR microprocessors

Atmel described a simple programmer based on the AT90S1200 (NOT the AT90S1200A) controller in their application note, AVR910 (a modification to use the AT90S2313 is also given below). The circuit is so small and simple, I was able to put...

Automatic Switch Project

Model railroad turnouts, often referred to as switches, can be controlled in various ways. The simplest method is manual control, operated by hand. Remote activation is typically achieved through pneumatic (air) or electrical means. The project discussed in these articles...

Exploring Microcontrollers

Many of today's appliances feature displays and buttons. Instead of relying on motors and gears, numerous household items now incorporate embedded microcontrollers. This exploration focuses on how to experiment with microcontrollers at home. Microcontrollers serve as the central processing units for...

pc based digital ic tester

Check the following ICs: 7400, 7402, 7404, 7408, 7432, 7486. A Visual Basic program is utilized to display the results on the PC. The microcontroller AT89S52 receives the IC number from the PC, verifies the logic gates with the truth...

How to add 32K crystal/clock source to AVR Microcontroller (ATmega8)

This article explains how to add a 32K external crystal/clock source to the Atmel AVR microcontroller Atmega8, including a circuit diagram and a C program. The Atmel AVR microcontroller Atmega8 is a popular choice for various embedded applications, often requiring an...

AVR/51 Development board

A circuit diagram was created using KiCad, which is considered an excellent free software for designing electronic diagrams and printed circuit boards. KiCad is a powerful open-source software suite that allows engineers and hobbyists to design electronic circuits and printed...

Blinking an LED AVR Tutorial

Blinking an LED is the introductory project for programming microcontrollers. It serves as an effective method to navigate the entire development process and verify the functionality of all tools. This chapter involves connecting a light-emitting diode (LED) to an AVR...