AD7705/AD7706 Library
AD7705 and AD7706 are two 16-bit Sigma Delta ADCs. Equipped with on-chip digital filters and programmable gain front ends, these […]
Interfacing DS7505
The DS7505 digital thermometer and thermostat is a very versatile temperature sensor. It offers 9 to 12-bit digital temperature readings […]
TCA9555 Library for Arduino
TCA9555 is a 16-bit I2C I/O expander from Texas Instruments. It allows the easy addition of 16 I/O ports on […]
Arbitrary Waveform Generation with Arduino
Arbitrary waveform generators come in handy when troubleshooting digital and analog circuits. Most commercial arbitrary waveform generators are very expensive […]
A Sensitive DIY Ultrasonic Range Sensor – Update
After I wrote this guide on how to build an ultrasonic range sensor from scratch, I have received many comments […]
A Sensitive DIY Ultrasonic Range Sensor
I needed some ultrasonic range finders for my project. But most of the commercial sensors like Parallax’s PING sensor and […]
Digital Metronome
It is fairly simple to build a digital metronome using an ATmega328 AVR chip and some minimal programming using the […]
Simple Optical Encoder For Wheel Rotation Detection – II
In my previous post, I showed a simple optical encoder circuit that is TTL compatible. The main drawback of the […]
Simple Optical Encoder For Wheel Rotation Detection – I
To detect wheel rotations in model vehicles, we would need to install some kind of sensors on the wheels to […]
Modified Sine Wave Generation With AVR
Modified sine wave is essentially just a pulse width modified square wave. It is a very useful waveform for power […]
4KHz-170MHz Wide Band RF Signal Generator – II
Continue with my previous article, let me first explain the code a little bit.
4KHz-170MHz Wide Band RF Signal Generator – I
A signal generator can come in handy when working with digital and analog circuits. While most commercial grade signal generators […]
Temperature/Humidity Data Logger — Trial Run
I built a rather generic I2C data logger a few weeks back. As I mentioned in my earlier posts, it […]
Wide-band RF Field Strength Meter
Field strength meter is extremely useful when working with RF devices. It can be used to quickly diagnose whether a […]
RF Data Link Using Si4021 And Si4311
Among the many commercial ISM band RF transmitter and receiver ICs, I have found that Silicon Labs‘ Si4021 (transmitter IC) […]