Testing of sensors with RS485 using PC without proper interface is not possible. Since RS232 interfaces are very rare, the interface should be hooked to USB. The interface between USB and RS485 can be soldered with one of the many FTDI interfaces with added RS485 driver, or bought as assembled module. There is always the […]
USB to RS485 converter Continue Reading
A stepper motor shakes a limb to frighten away birds and squirrels. It is under the control of the MKR1000. Things used in this project Hardware components DC motor (generic) × 1 Arduino MKR1000 × 1 Story The project uses a stepper motor to pull down on a fig tree limb to frighten away birds
Rotary encoders with centre-push buttons are cool input hardware for projects, especially if you want to be able to scroll through menus and select options. Hopefully this Instructable will give you the confidence to try a basic menu system out and combine it with a rotary encoder to give a professional feel to your next
Easy Arduino Menus for Rotary Encoders Continue Reading
Finally, PULP, goes multicore! We are happy to launch our flagship RISC-V-based parallel-ultra low power open source system. Simply put, OPENPULP, today’s new kid in town, is the most advanced open-source release we have done so far, and a quantum leap ahead in terms of performance, efficiency and completeness. OPENPULP is an MCU on steroids:
PULPino – An open-source microcontroller system based on RISC-V Continue Reading
Have you worked with ready-made 8×8 LED matrix as displays? They come in various sizes and are quite interesting to work with. A large readily available size is around 60mm x 60mm. However, if you are looking for a much larger ready-made LED matrix, you may be out of luck. For this project, we will
Large 8×8 LED Matrix Display Continue Reading
I’ve been thinking about building stuff with FPGA’s for a while, and usually get turned away because FPGA’s are considerably harder to implement than microcontrollers since they have no on-chip memory. It is necessary to re-program the gates every time they power up, which requires an external flash memory chip. There aren’t great references online
DIY FPGA Programming Continue Reading
Metal Detector is a security device which is used for detecting metals which can be harmful, at various places like Airports, shopping malls, cinemas etc. Previously we have made a very simple Metal detector without a microcontroller, now we are building the Metal Detector using Arduino. In this project, we are going to use a
Arduino Metal Detector Continue Reading
Having recently bought a house, project time has been a bit thin on the ground. As a standard terrace house, the consumer unit and electricity meter were in the entrance hallway, exposed and looking a bit naff. I liked the look of the meter so I quickly created a box that allowed the meter to
Nixie Tube Energy Meter Continue Reading
Pull-up resistors are very common when using microcontrollers (MCUs) or any digital logic device. This tutorial will explain when and where to use pull-up resistors, then we will do a simple calculation to show why pull-ups are important. Suggested Reading Concepts that you should be familiar with before proceeding: What is a circuit? Resistors Voltage,
Pull-up Resistors explained Continue Reading
Experimenting with an HF oscillator, I needed to control the varactor diode voltage in precise increments over a 2V-10V range. A buffered potentiometer was the obvious choice, and connecting two pots in series to give coarse/fine control (or using a multiturn pot) would offer improved control over the varactor voltage. However, this approach still didn’t
Control accurate incremental voltage steps with a rotary encoder Continue Reading
