Earlier, we talked about the level shifter. Raspberry Pi, ESP32 etc things operate at 3.3v logic whereas, relay modules usually need near 5v TTL logic level. In our guide to control AC appliances over the internet with ESP32, you will notice that directly connecting the relay with ESP32 will not properly work - it will work over the internet but when you'll press the pushbutton, it will go to off … [Read more...]
Arduino High Resolution Music & Alexa Intergration With Sony Spresense
We are not scrapping ESP32 SoC. It is alone good for projects such as Glass Touch Switch With LED. When we need high end multimedia such as good camera, high resolution music then we need something like Sony Spresense. Sony Spresense is best for trying day to day high-quality DIY gizmos. The higher initial cost of Sony Spresense does give a good return. Now, the Sony Spresense device itself does … [Read more...]
EL Wire (Electroluminescent Wire) Basics For DIY Works
EL wire is wire which glows without LED. We can control EL Wire through an Arduino or ESP32. These are thin copper wire coated in a phosphor which produces light when AC is applied to it. AC does not mean home supply AC - battery with inverter enough for them. They can be used in a wide variety of projects much as custom neon lights were often used. The thin diameter EL wires make them flexible … [Read more...]
Traffic-Sign Recognition : Basics
Traffic-Sign Recognition (TSR) is a part of Advanced Driver-Assistance Systems (ADAS). Traffic-Sign Recognition (TSR) helps the vehicles to recognize the traffic signs on the road. The signs can be speed limit, school children, turn ahead, speed breaker and so on. The Traffic-Sign Recognition systems are increasingly being used for road traffic safety by helping the drivers by automatic alerts on … [Read more...]
2-in-1 convertible laptops vs Android Tablets
2-in-1 laptops have a screen which flips back 360 degrees. The screen can be detachable, which makes hybrid of tablet and desktop and the rest 2-in-1 laptops have a screen that flips off, providing a tablet experience and commonly named as “convertible”. Unless desktop computers are in consideration, 2-in-1 convertible laptops with 14 inch and 15-inch screens are of definite attraction. There are … [Read more...]
ESP32 Relay Control : Shift 3.3V Signal to 5V Signal
In our guide on Controlling AC Powered Appliances With ESP32 and IBM Watson IoT we pointed that the relay connected with ESP32 may not properly function. There are many ways to shift the 3.3V signal to 5V signal. A level shifter or logic-level shifter is a circuit used to translate signals from one logic level or voltage to another. The logic-level shifter can be uni-directional, … [Read more...]
ESP32 Arduino Glass Touch Button : Cheap DIY Method
Earlier, we published a theoretical article named How to Build ESP32 Arduino Glass Touch Switch With LED. Here is How to Develop Your Own ESP32 Arduino Glass Touch Button in Cheap DIY Way and Calibrate it to the Best Result. Minimal resources needed for this project. In future, we will improve this thing with backlit LED. The above-linked article will give you a link to Espressif GitHub … [Read more...]
What to Know to Buy a NFC USB Dongle For Android, PC, Mac
Near-field communication (NFC) is a set of protocols which enables two devices to establish communication by bringing them closer to each other. Most commonly known NFC devices are used in contactless payment systems on credit and debit cards (sometimes referred to as contactless cards). Apart from that usage, NFC can be used for sharing contacts, photos, videos or files exactly like Bluetooth but … [Read more...]
Tips For Building Digital Switch With ESP32 Arduino
There are some design considerations to increase safety while building an ESP32 Arduino based physical switch controlled by IoT project. In our earlier guide (Controlling AC Powered Appliances With ESP32 and IBM Watson IoT), we have shown the basic of how to use a pushbutton and IoT control together. The case will be using both the pushbutton and IoT control independent. Our that guide is a … [Read more...]
Required Circuit For Bare Minimum ESP32 Module
When you need many ESP32 for projects then you'll save money by avoiding full development board. Import tax is quite higher in many countries, yet the bare ESP32 module cost only $3. Bare minimum ESP32 module is more than System on Chip. ESP32 module, unfortunately, does not have built-in USB–TTL/ UART hardware. That costs $1.5 per piece and you do not need to connect USB–TTL/ UART hardware … [Read more...]
Develop WEB Applications with ESP32 and IBM Watson IoT
Here is How to Develop Web Applications with ESP32 and IBM Watson IoT. Often, using an HTML page with JavaScript is practical than developing an Android App. Because, web applications can be hosted on own cloud server or cloud storage service - thus it becomes device independent. Securing access to such web application usually, need minimal configuration for the Apache2 server. Cloud storages … [Read more...]
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