Category: EE

TDA1554Q Audio AmplifierTDA1554Q is a 4*11W si…

TDA1554Q Audio Amplifier

TDA1554Q is a 4*11W single ended or 2*22W power amplifier IC, with an
integrated Class-B output amplifier. TDA1554Q comes in a 17 lead
single-in-line package. The internal circuitry contains a 4*11W single
ended or 2*22W bridge amplifier. Among all four amplifiers two are
inverting and other two are non-inverting. Also, each amplifier has a
gain of 20dB (26dB in BTL). TDA1554q also have mute/stand-by feature.

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Arduino Based Guitar Tuner Hi guys, during th…

Arduino Based Guitar Tuner

Hi guys, during the last few weeks, I’ve been working on reconnecting with my love for the guitar. Playing the box guitar was how I relax few years back before the saxophone took over. Going back to the guitar, after 3 years of rarely strumming a chord, I discovered amongst other things that I no longer knew how each of the string should sound, to put it in my friend’s words, “My hearing was no longer tuned” and as a result of this, I was not able to tune the guitar without the aid of a keyboard or a mobile app which I later downloaded. The weeks went by till few days ago when the maker in me became motivated and I decided to build an Arduino based Guitar Tuner. In today’s tutorial, I will be sharing how to build your own DIY Arduino Guitar Tuner.

Find here the complete DIY project for Arduino Guitar Tuner:

DIY Breadboard Power Supply Circuit on PCB

DIY Breadboard Power Supply Circuit on PCB

A Power supply unit is a very commonly used tool by most engineers during the development stage. I personally use it a lot when experimenting with my circuit designs on Breadboard or to power up a simple module. Most of the digital circuits or embedded circuits have a standard operating voltage of either 5V or 3.3V, so I decided to build a Power supply which can supply 5V/3.3V on the power rails of the breadboard and fits snugly on the breadboard.

BC549 NPN TransistorBC549 is a NPN transist…

BC549 NPN Transistor

BC549 is a NPN transistor hence the
collector and emitter will be left open (Reverse biased) when the base
pin is held at ground and will be closed (Forward biased) when a signal
is provided to base pin. It is a low current transistor hence the
maximum amount of current that could flow through the Collector pin (Ic)
is 100mA, hence we cannot connect loads that consume more than 100mA
and load voltage more than 30V using this transistor. BC549 has a decent
gain value hfe from 420 to 800; this value determines the amplification
capacity of the transistor.

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UM3561 Sound Generator ICUM3561 includes os…

UM3561 Sound Generator IC

UM3561 includes oscillator and selector circuits, a
compact sound module can be constructed with only a few additional
components. The UM3561 contains a programmed mask ROM to simulate siren
sound. There is a tone generator within UM3561, which is able to
generate different tones using the oscillator clock and according to the
data given by the ROM. Each data stored in the ROM corresponds to each
tone and it can be selected by using the address of the data location.

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Analog Speedometer Using Arduino and IR Sensor

Analog Speedometer Using Arduino and IR Sensor

Measuring the speed/rpm of a Vehicle or a motor has always been a fascinating project to try. In this project, we are going to build a Analog Speedometer using the Arduino. We will use IR Sensor module to measure the speed. There are other ways/sensors for this, like hall sensor to measure speed, but using an IR sensor is easy because IR sensor module is very common device and we can get it easily from the market and also it can be used on any type of motor/Vehicle.

1N5822 Schottky DiodeSchottky diodes have v…

1N5822 Schottky Diode

Schottky diodes have very low forward drop voltage VF
which makes them ideal for fast switching applications at lower current
ratings. 1N5822 have forward voltage drop of minimum 0.525 V that is it
requires 0.525 V to conduct in forward biased direction. The 1N5822 has
maximum average forward rectified current IF(AV) of 3A. The maximum repetitive peak reverse voltage VRRM for 1N5822 is 40V.

RFID Interfacing with PIC Microcontroller

RFID Interfacing with PIC Microcontroller

To read the Passive RFID cards and tag, we need a microcontroller with UART hardware. If we select a microcontroller without UART, we need to implement software UART. Here we are using PIC Microcontroller PIC16F877A for interfacing RFID. We will simply read the unique identification no. of RFID tags and display it on 16×2 LCD.

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STM32F103C8 ADC Tutorial – Measuring Analog Vo…

STM32F103C8 ADC Tutorial – Measuring Analog Voltage

The ADC embedded in #STM32 microcontrollers uses the SAR (successive approximation register) principle, by which the conversion is performed in several steps. The number of conversion steps is equal to the number of bits in the ADC converter. Each step is driven by the ADC clock. Each ADC clock produces one bit from result to output. The ADC internal design is based on the switched-capacitor technique.

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Self Balancing Robot using Arduino

Self Balancing Robot using Arduino

Once I started building the self balancing robot, I realized that this bot is a bit of a challenge to build. There are so many options to select from and hence the confusions start right form selecting the motors and remains till tuning PID values. And there are so many things to consider like type of battery, position of battery, wheel grip, type of motor driver, maintaining the CoG (Centre of gravity) and much more.

But let me break it to you, once you build it you will agree that it’s not as hard as it sounds to be. So let’s face it, in this tutorial I will document my experience in building the self balancing robot. You might be an absolute beginner who is just getting started or might have landed up here after a long frustration of not getting your bot to work. This place aims to be your final destination.

Find here the complete DIY instructions with code and circuit: