In this video we learn how to use this 8x8 RGB LED matrix. This matrix is using the WS2812 driver and it is great, because each LED is individually addressable. Only one microcontroller pin is required to control all the LEDs, and you get 24 bit color for each LED. 8x8 RGB Led...

Brett Killion has published his Arduino shield a Network Analyzer on an Arduino Shield which covers from 0-72MHz. The network analyzer shield uses an Analog Devices AD9851 DDS chip clocked at 180MHz which will output a sine wave at any frequency from 0Hz and 72MHz. The DDS output is...

TC-Engineering has documented their efforts to program a Spartan 6 FPGA using a DIY PCB. The hardware part and software are discussed on the link below. I’ve been thinking about building stuff with FPGA’s for a while, and usually get turned away because FPGA’s are considerably...

Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due to overheating. Here is an add-on device for the workbench power supply that reminds you of the power-on status of the connected devices every hour or so by sounding a...

This project provides a variable output voltage ranging from 1.2 to 32 V @ 5 A. Project based on LM338K IC, LM338K is adjustable 3 terminal positive voltage regulator capable of supply in excess of 5A over a 1.2V to 32V output range, simple circuit consist few...

TechDepot Egypt @ instructables.com has published a tutorial on how to connect a HC-05 Bluetooth module to Arduino. Turorial shows how to connect the module with Arduino and example code is included. It is worth noting that the HC-05 power in (Vcc) uses 5V, while the transmit and...

Edward K. Miguel @ electronicdesign.com has published a circuit that has output high when the votlage in input is 220V and output low when the voltage is 110V. This is often useful on motor control and power supply systems. The circuit illustrated in the figure monitors the ac line...

Jesus Echavarria has posted a new project, a dual USB - Serial and I2C converter to communicate with serial and I2C devices. Hi all! After a couple of months with a lot of work, I come here again with the last board I develop before Christmas. It’s a dual USB serial and I2C...