AD9850 Signal Generator PIC16F
This is a modified version of basic wave generator design with AD9850 and Microchip PIC16F microcontroller. A relatively simple assembly code available for download at the bottom of the page. Instead of using a rotary encoder as many other similar available ...
3.5 Digit Dot Matrix LED Display
In this post I'll show you how two QDSP-L149 5x7 dot matrix LED Displays can be used to create a 4 Digit display module. The trick is to change the roles of rows and columns. So now each 5x7 Dot ...
PIC16F877A Digital Clock
This is PIC16F877A microcontroller based digital clock with 7-Segment display. For this project LTC3710HR was used, however the schematic can be easily adjusted to incorporate larger displays.LTC3710HR is 0.3 inch quadruple digit multiplex common cathode display.Main consideration for choosing the display ...
Arduino Up Down Counter LCD
Up Down Counter design based on Arduino MEGA compatible board is the topic of this article.it uses 2x16 LCD display to show the counter values and 4x3 keypad to input initial 3 digit number.The counter will count Up/Down according to ...
Humidity and Temperature Sensor DHT11 with Arduino
Interfacing Humidity and Temperature Sensor DHT11 with Arduino platform is the topic of this post. I’ve published a number of designs with various temperature sensor, both digital and analog. Here you can see how to use LM75A digital sensor with ...
Response Time Meter
If you ever thought how fast you can react to external stimulus here is the circuit that can measure your response time. It measures the time it takes for you to press the push button in response to turning the ...
LED Aquarium Lighting
Recently I was asked to build an aquarium lighting controller prototype to provide variable brightness during its operation and ability to program ON/OFF times. 25 blue and white diffused 10mm LED were used to illuminate the aquarium. The main requirement from ...
Sine Wave with MCP4725 and Rasperry Pi
Generating Sine wave is a relatively simple task. It can be done by adding MCP4725 12bit DAC to Raspberry Pi. For Arduino version based on PCF8591 IC click this link. This setup is based on I2C interface and works by ...
Arduino Ohm Meter
Arduino Ohm Meter is one of the simplest circuits that can be built with minimal number of required components. As can be seen from design schematic a standard 2x16 LCD display and 3 resistors are all you need to complete ...
Raspberry Pi 3 Digit LED 7-Segment Countdown Timer
Multiplexing 7-Segment display scheme with Raspberry Pi as described here can be used as a basis for more complex projects. By adding 4x4 keypad matrix and replacing individual 7-Segment displays with a common anode 4 digit 7-Segments module a simple ...
