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Author: Prabhu TL

Prabhu TL is a SenseCentral contributor covering digital products, entrepreneurship, and scalable online business systems. He focuses on turning ideas into repeatable processes—validation, positioning, marketing, and execution. His writing is known for simple frameworks, clear checklists, and real-world examples. When he’s not writing, he’s usually building new digital assets and experimenting with growth channels.

Basics

A safe, wearable soft sensor

This biocompatible sensor is made from a non-toxic, highly conductive liquid solution that could be used in diagnostics,…

August 11, 2021 · Prabhu TL
Basics

Robotic Arm

Servomotor Building Blocks for Robotics The servomotor brackets discussed in this chapter will allow you to create various servomotor robots and projects. Servomotors are ideal for powering robots. They are readily available in many sizes, are inexpensive, provide powerful torque for their size and weight, and are positional. The output shafts on most hobby servomotors are guaranteed positional between 0° and 90°. Most servomotors’ output shaft range extends past 90°, coming close to 180°. The servomotor bracket components are shown in Fig. 12.1.…

August 11, 2021 · Prabhu TL
Basics

How the circuit works

Before we can get into the nuts and bolts of how the interface circuit functions, we must look at the binary information output by the speech recognition circuit. The output of the speech recognition circuit consists of two 4­bit binarycoded decimal (BCD) numbers. This binary (BCD) information is shown on the speech circuit’s two-digit digital display. Whenever a word is detected, the circuit uses the digital display to output the word number it has recognized, or else it outputs its unrecognized/error code. If the word detected is not recognized, the circuit will display one of the following error codes: Our interface design incorporates a PIC microcontroller. A preprogrammed microcontroller’s (16F84) first job is to determine if a word has been spoken. To do this, we use an LM339 comparator.…

August 11, 2021 · Prabhu TL
Basics

Speech Recognition Circuit

The speech recognition circuit is available as a kit from Images SI Inc. You can purchase the main components, HM2007, SRAM, and printed circuit boards separately if you like and build from scratch. The kit takes a modular approach and uses three separate printed circuit (PC) boards. The three PC boards are the main circuit board containing the speech recognition circuit, digital display board, and keypad. The keypad and digital display are removable from the main circuit board.…

August 11, 2021 · Prabhu TL
Basics

Speech Recognition

In the near future, speech will be the method for controlling appliances, toys, tools, computers, and robotics. There is a huge commercial market waiting for this technology to mature. Our speech recognition circuit is a stand­alone trainable speech recognition circuit that may be interfaced to control just about anything electrical. The interface circuit we will build in the second part of this chapter will allow this speech recognition circuit to control a variety of electrical devices such as appliances, test instruments, VCRs, TVs, and of course robots. The circuit…

August 11, 2021 · Prabhu TL