# BuddyKit.io

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Your Engineering Companion

## Sitemaps

- [XML Sitemap](https://buddykit.io/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [I2C - DS1307 - 24C02](https://buddykit.io/i2c/): I2C troubleshooting guide covering initialization, signal glitches, clock stretching, multi-master conflicts, and speed optimization tips for reliable communication.
- [PCF8591 ADC & DAC](https://buddykit.io/pcf8591/): PCF8591 FAQ: Init, correct I2C address, pull-ups, stable power. use capacitors for noise, enable DAC, check voltage range, and select correct channels.
- [4Bit LCD Interface &FAQ](https://buddykit.io/lcd4/): Ensure LCD_Init(), correct power/contrast, wiring, RS/EN timing, clear, set cursor, use correct I2C address, delays, and define custom characters carefully.
- [7 Segment Display FAQ](https://buddykit.io/7segment/): 7-segment display FAQ: common anode/cathode, wiring, lookup table, refresh rate, current-limiting resistors, decimal/negative formatting, and multiplexing.
- [UART Library FAQ](https://buddykit.io/uart/): UART troubleshooting: Ensure correct CPU_CLK, TX/RX wiring, matching baud rates, null-terminated strings, use timeouts and high-speed UART.
- [Intro - BuddyKit - Software Installation](https://buddykit.io/intro-buddykit-software-installation/): Learn to set up BuddyKit 51 Mini with SDCC & VSCode, build projects, and flash HEX files easily using prebuilt libraries for LCD, EEPROM, RTC, and more.
- [Class 1 - Basic LED Blinking Using NOP](https://buddykit.io/class-1-blinking-an-led/): Learn how to blink an LED with the 8051 microcontroller using port P1.1 and nested loops for delay, a foundational embedded systems project.
- [Class 2 - Input Handling –LED Control with Button](https://buddykit.io/class-2-input-handling-led-control-with-button/): Learn how to read 8051 input pins, connect a button to P1.2, toggle an LED, and prevent multiple triggers using release check or debounce.
- [Class 3 - 7-Segment Display Counter Using 8051](https://buddykit.io/class-3-7-segment-display-counter/): Learn to build a 0–9 counter on a 7-segment display using Buddy51 and 8051. Step-by-step guide with lookup table and button input.
- [Class 4 - LCD Counter Using 8051](https://buddykit.io/class-4-counter-using-lcd/): Learn to display a button counter on a 16x2 LCD with Buddy51. Step-by-step guide for 4-bit LCD mode using 8051 and SDCC.
- [Class 5 - 4x4 Matrix Keypad & LCD](https://buddykit.io/class-5-4x4-matrix-keypad-lcd/): Learn how a 4x4 matrix keypad works with Buddy51. Detect key presses using row-column scanning and display results on LCD easily.
- [Class 6 - Simple Digital Door Lock](https://buddykit.io/class-6-simple-digital-door-lock/): Build a secure digital door lock using Buddy51, 4x4 keypad, relay, and LCD. Set passwords, lock/unlock doors, and learn embedded control basics.
- [Ultrasonic Sensor Distance Calculation - BuddyKit](https://buddykit.io/ultrasonic-sensor-distance-calculation-buddykit/): Measure distance with Buddy51 using ultrasonic sensor. Timer ticks, integer math, and sound speed give accurate 8051-based readings efficiently.
- [Class 7 - Simple RPM Counter Using Timer](https://buddykit.io/class-7-simple-rpm-counter/): Learn Buddy51 timers and counters for precise delays. Build RPM meter using Timer0/1, check overflow flags, and count sensor pulses efficiently.
- [Class 8 - Servo Control with PWM](https://buddykit.io/class-8-servo-motor/): Learn precise 8051 servo control using PWM. Convert angles to pulse width, generate ON/OFF cycles with Timer0, and control hobby servos efficiently.
- [Class 9 - I2C Concept & RTC using DS1307](https://buddykit.io/class-9-i2c-concept-rtc-using-ds1307/): Learn I2C communication with BuddyKit, interfacing DS1307 RTC for real-time clock display. Step-by-step guide for microcontroller projects.
- [Class 10 - Digital Clock Project using 7 Segment](https://buddykit.io/class-10-digital-clock-project-using-7-segment/): Learn to build a digital clock from scratch using Buddy51, 7-segment LEDs, and RTC. Step-by-step guide for students and electronics enthusiasts.
- [Class 11 – Digital Clock Using Interrupt](https://buddykit.io/class-11-digital-clock-using-interrupt/): Build a smooth 7-segment digital clock using 8051 timer interrupt. Eliminate flicker, improve scanning, and master real-time embedded control easily.

## Pages

- [Home](https://buddykit.io/)
- [Resources](https://buddykit.io/resources/)
- [Blogs](https://buddykit.io/blogs/)
- [About Us](https://buddykit.io/about-us/)
- [Our Classes](https://buddykit.io/our-classes/)
- [Discussion](https://buddykit.io/discussion/)
- [Page Not Found](https://buddykit.io/page-not-found/)

## Categories

- [I2C](https://buddykit.io/category/i2c/)
- [UART](https://buddykit.io/category/uart/)
- [Display](https://buddykit.io/category/display/)
- [TIMER](https://buddykit.io/category/timer/)
- [Classes](https://buddykit.io/category/classes/)
- [Basic Classes](https://buddykit.io/category/classes/basic-classes/)
- [Projects](https://buddykit.io/category/projects/)
- [Sensors](https://buddykit.io/category/sensors/)

## Team categories

- [Our Staff](https://buddykit.io/pb_team_category/our-staff/)