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Using Python to control Servo Motors for Internet of Things projects

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Sponsored Content

How to control Servo motors #IoT projects:

What you need:
a Flip&Click by microElectronika, that carries a # SAM3X MCU by Microchip Technology Inc.
-A servo motor
- # Zerynth Studio, to program the board in # Python
- Zernyth App, to run the jqWidgets. GUI

Find out More!

Designing Switching Mechanism with Step Up Transformer for Square Wave Inverter - Part 07/17

Contributor: 

Dikhsa
Half Bridge Square Wave Inverter Circuit in ActionIn the previous tutorial, a square wave generator was designed having a symmetric output waveform having 50 Hz frequency and 12 V peak to peak voltage. The square wave generator designed using 555 timer IC was meant to provide input square wave in the inverter circuit.
 
Now, it is time to complete the square wave inverter circuit by adding a switching mechanism and step up transformer in the previous designed circuitry. The square wave generated from the 555 IC based circuit has peak to peak voltage of 12 V. This voltage needs to be stepped up using a step up transformer. So a step up transformer of 12V-0-12V rating is used for this purpose. But not only the voltage need to be simply stepped up, there is also a need for switching mechanism which allows drawing power from the inverter on power failure.

Keypad Controlled And Industrial Gas Monitoring Wireless Robot

Contributor: 

Hari Prasaath K

Keypad controlled and Industrial Gas Monitoring Wireless Robot Circuit SetupThis project demonstrates the use of xbee as the transceiver where the robot is controlled by keypad and amount of gas is measured wirelessly through the xbee. The robot can be moved to the place within the range OF 30m (indoor) or 100m (outdoor) to monitor the amount of gas present in air.

The people only just need to operate the robot using the keypad in the receiver side, where humans no need to involve in entering to the place to measure some poisonous gas.

 

Designing Square Wave Inverter for UPS - Part 06/17

Contributor: 

Dikhsa
Square Wave Inverter Block Diagram The square wave inverter is easy to design and suitable for less sensitive electronic devices. For more sensitive electronics, the supply from square wave inverter can result into noise. In this tutorial, a square wave inverter is designed which will input power from a battery and output a square AC waveform. An Inverter should generate an AC signal at the output but that signal is not necessarily an exact sine wave.
 
A square wave can also be considered as an AC signal which can be used to drive less sensitive AC devices.

Xbee - Wireless Joystick Control and Distance Measuring Robot

Contributor: 

Hari Prasaath K

This project demonstrates the use of xbee as the transceiver where the robot is controlled and distance is measured wirelessly through the xbee. The robot can be moved to the place within the range OF 30m (indoor) or 100m (outdoor) to measure the any distance.

The person only just need to operate the robot using the movement joystick in the receiver side, where person no need to move from the place to measure the distance with his tape.

Switching mechanism for Linear Regulator Single Cell Li-ion Battery Charger using microcontroller and relay

Contributor: 

Diksha

In the previous tutorial, the Constant Current (CC) Source of 60 mA and Constant Voltage (CV) Source of 4.2 V were designed using LM317 voltage regulator IC. The constant current source is to be used for constant current mode of the battery charging while the constant voltage source is to be used for constant voltage mode of the battery charging. During the designing of constant current source and the constant voltage source, testing a Li-ion battery before charging it was also discussed. Check out the previous tutorial “Basics of Li-ion battery charging” for learning about the basics of Lithium ion batteries, their charging methods and topologies.

Alcohol and Smoke Detection in Prohibited Areas

Contributor: 

Hari Prasaath K
AVR Atmega 32 based Alcohol and Smoking Detector Circuit Smoking and alcohol are hazardous to health. Also, the consumption of alcohol is one of the reasons behind many anti-social incidents. That is why, smoking and consumption of alcohol is prohibited in many areas like it is prohibited in schools, colleges, hospitals and public transport like buses and trains. In fact, these kind of activities must be prohibited in all kind of public places. Despite rules of prohibition, there are many incidents when people are found not abiding the rules. In such case, for law enforcement, there must be some system to detect infringement of such laws and the authorities must be sent an alert at time.
 
In this tutorial, an electronic system for the same has been designed.

Designing Constant Current and Constant Voltage Source for Single Cell Li-ion Battery Charger

Contributor: 

Diksha
Battery linear charger real time circuit arrangementIn the previous tutorial, the basics of Lithium ion batteries were discussed. Also, it was discussed how it is important to handle these batteries with care. as mentioned in the previous tutorial, that Lithium ion batteries need to be charged using CC-CV method, in this tutorial, a Li-ion battery charger for a single-cell Li-ion battery of nominal voltage 3.7 V will be designed. 
 
There are charger modules available in the market which can be used to charge the Li-ion batteries. In this tutorial, a charger built using the basic electronic components including Linear Regulator will be designed from scratch. The charger circuit will be customized as per the battery specifications and the charging requirements.

Hand Gesture Controlled Wireless Robot

Contributor: 

Hari Prasaath K
The wireless robots are controlled in many ways. Usually, these robots are controlled with the help of a remote control which connects with the robot via Bluetooth, Wi-Fi or RF interface. The remote control has physical buttons to move the robot in different directions.
 
The use of a remote control having buttons to control a robot has a drawback when the robot needs to be controlled instantly and precisely. It involves delay due to the response time of the human handling the remote control. The response time in controlling the robot can be reduced by providing some sort of advanced human interfaces like controlling the robot via gestures, eye movements or brain waves.

Designing 12V Lead-Acid Battery Constant Voltage Limited Current Charger for UPS

Contributor: 

Diksha
18-0-18V Step down transformerIn this tutorial, a constant voltage charger for the 12V lead acid battery will be designed. The lead-acid batteries can be charged in different ways or modes. In this tutorial, a constant voltage charger will be designed for charging the lead-acid battery. The battery is required to be supplied limited current which saturates once the peak terminal voltage is achieved in the charging process.
 
Depending on the per cell voltage of the 12V battery, the maximum rated voltage of the battery varies from 13.5 V to 14.6 V. In this tutorial, the charger circuit is designed for charging a lead acid battery having peak terminal voltage of 14.4 V.