Personal Blog
Step by step instructions and other information to do something.
USBasp is an open-source in-circuit or in-system programmer for AVR microcontroller platform. It is widely available and is a cheap alternative to official programmers from Atmel USBasp was created by Thomas Fischl and was initially released in 2005. The programmer…
Fingerprints are one of the many unique biometric signatures we can use to identify people very accurately. But just by holding someone’s hand and staring at their fingers can’t be practical [grins]; we’re not good at it. But computers are…
A real-time clock (RTC) is a circuit that keeps track of time by counting the precise oscillations of a crystal oscillator of known frequency. For example, a typical frequency of a quartz crystal oscillator used in RTC applications is 32.768 kHz. That frequency is not…
When using any STM32 microcontrollers, GPIOs need to be initialized before you can use them in the application program. The GPIO peripheral is configured and controlled using a set of registers. Multiple registers are assigned to each port available in an STM32…
There will be times when you have to store large amount of log data and other information for your Arduino project, for example a GPS logger. The EEPROM memory of all available microcontrollers are limited in size. The solution is to use flash memories.…
When it comes to communicating with a microcontroller, the word “serial” just pops up into mind if you’re familiar with microcontrollers. Three major communication protocols/interfaces used by microcontrollers are UART, SPI and I2C (TWI). Universal Asynchronous Receiver Transmitter (UART) as its name says, is an asynchronous serial communication…
A rotary encoder is a cleverly designed piece of hardware that finds use in every projects that require to sense the rotatory motion of some shaft, knob etc, to find the direction of rotation, angular velocity etc. There are many types…
Recently I bought a bunch of components and modules from a new website called Ink Ocean, of which one was a two wire 0-30 digital voltmeter module. The model number printed on the PCB was DSN-DVM-368. I don’t know who makes it, or…