Tag: electronics

Electronics and Programming tutorials and projects

esp8266 esp32 microphone camera

ESP8266 ESP32 Microphone Camera Package

The ESP8266, ESP32 Microphone Camera Package includes ESP8266 WiFi Microphone, ESP32 WiFi Microphone, ESP32 IP Camera and ESP32 Camera Microphone projects firmware, Arduino .ino files, Schematics and PCB files. ESP8266, ESP32 Microphone Camera This package is called “WiCard Security System” which includes the following project source codes and manual files: You can either use the…
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esp32-cam time lapse

ESP32-Cam Camera Microphone

This article is about “WiFi ESP32-Cam Camera Microphone (SpyCam)” firmware project which has been made by Ai Thinker ESP32-Cam module, the circuit (or WaveShare Sound Sensor) and arduino source code (.ino) files. The firmware includes a Web Application (WebApp), to access to this WebApp, there’s no need to internet connection or installing a software or…
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led resistor calculation

LED Resistor Calculation

This article is about how to calculate LED resistor. The working voltage of most of the LEDs/Power LEDs is between 2-4 volts. Sometimes our power source may supply a higher voltage (e.g. 5V), so if we try to turn on the LED with higher voltage, the LED burns. The LEDs are making with different specifications,…
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wicard programmable wifi module 5

Prices of Electronics and Programming projects

You can get the general releases of the projects for free or at low prices through the link below, or inquire a customized project (either one of the general programming/electronics/arduino project or a new project) through our contact form. https://wicard.net/projects Basic prices for inquiring a standard PCB design with schematics: The basic price of designing…
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fat16 protocol FAT 协议

FAT protocol (drive format)

This article provides an overview of a storage hardware protocols. FAT16 or FAT protocol can format memories up to two gigabytes. FAT protocol In the FAT protocol, data is categorized only, and by reading the beginning of the hard disk, you can know the address of the data. The starting location of a drive which…
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d latch flip flop

D Latch Flip-Flop Chip Design

A D Latch flip flop is in fact a one bit “Random Access Memory (RAM)”. That means at the start up, “Q” pin may be “1” or “0”. With paralleling 8 of D. Latches, you can make an 8-bit or one byte RAM. The D Latch that I had designed on a paper is a…
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nokia lcd 6125 n71 6100

Nokia LCD (6125) setup and programming

Here’s a simple circuit and code which is compatible with PCF8833 driver for old Nokia LCD (tiny LCDs) such as 1208, 1600, 2126, 2310, 6100, 6125, N71. The circuit and code in this project is compatible with PCF8833 STN RGB – 132*132*3 LCD driver. This LCD driver has been used for some Nokia tiny LCDs…
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arm lpc1768 sim908 gps gms gprs

ARM LPC1768 Operating System

About ten years ago, I’d like to start an operating system project for the sell phones like Android and Symbian. So I started to make a cell phone with ARM LPC1768 processor and SIM908 GPS/GSM/GPRS module. After a little struggle I succeed and built my basic design, but due to the situation, I couldn’t take…
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WiFi controllable robot 4 - WiCard 并联和串联电阻器

Advantages and disadvantages of connecting resistors in series and parallel

Based on experience, in standard circuit design, I do not recommend to connect resistors in parallel or series. However, sometimes due to reasons such as the need for high consumption power, we may need to use series and parallel resistors. This article was requested by one of the visitors. ***””Electronics, Programming and Arduino projects, including…
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Operational Amplifier IC (OP-AMP)

Operational Amplifier ICs (Op-Amp ICs) are usable for amplifying weaker voltages and currents. For example, the output of a signal generator with is a current of 10 micro-amps with 3 volts oscillation, but our circuit needs a 3 volts signal with a 3 milli-amps current. With using an operational amplifier, we provide the required current…
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