Quick LED heart project for Valentines day

If you are engineer in love than you should take an advantage and build something beautiful for Valentines day. So why not go with flashing heart. Mike suggests building simple PIC12F629 based heart powered by single CR2032 battery.

valentine_PIC_heart

He designed through hole PCB so anyone could easily build and assemble. The shape has 12 – 3mm red LEDs placed around. With single button it can be turned on and different flashing modes selected. He shares all building plans and asm code in case you would lake to tweak something. So don’t hesitate and build one as small things can mean a lot to someone.

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Placing watch on the ring

Building a wrist watch is quite a challenge, but when we want to squeeze electronics in to ring then real fun begins. It becomes even harder when using building blocks that are meant for prototyping. Anyway take a look at following instructable, where 陳亮 have put decent looking ring watch.

ring_watch

Ge had to squeeze Attiny85 microcontroller which comes in SOIC package. It’s been soldered on small prototyping PCB. Another large part of it is display. It’s 64×32 OLED display module with SSD1306 controller on board. Display is a biggest part of all and determines the ring width. Ring watch also carries s CR1220 battery with expectancy to last at least for half an year. Three push buttons gives ability to change settings. Time is counted internally and here helps Paul Stoffregen time function arduino library.

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Wireless energy monitor using ESP8266 module

Most of us are concern about energy usage. This helps to reduce bills, have a little impact on saving planet and be conscious about things you never thought being important. For the right task you need right tools. Brian Dorey have been successful on building energy metering. His previous Raspberry Pi based solar data logger gave him enough experience to move on with new idea of mains energy meter. This time he decided to use ESP8266 wireless module to do the main load. It has enough processing power to deal with sensor data also there are plenty of Arduino based libraries to make development easier.

energy_meter

His energy meter was designed to do three measurements: mains current, mains electric usage and gas usage. All three data streams had to be gathered in three different ways. First of all mains current. He used iSnail current sensor which simply outputs 0-5V for 0-100A current range. All he had to do is to read sensor output voltage with ADS1115 16-bit ADC from Texas Instruments. The data could be read using I2C interface. Continue reading

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Universal Arduino based distance meter

One way to measure the distance is to use ultrasonic transducer which is cheap and robust. Paoson Woodwork constantly needs to measure distances inside room while installing furniture or doing repair work. So he came up with idea of building an universal distance meter which would measure distances in all four directions at once.

He put electronics in to his custom made plywood enclosure where he made openings for sr04 ultrasonic transducers. He put an LCD in front, along with two buttons for unit selection and function. Additionally there is a bubble level tube included to keep things straight when hanging on the wall. All you have to do is to hang the meter on the wall and it displays the distance on LCD for in all four directions. It can display the area of wall with a single button press. There are other programs available along with area and distance. These are Rel – to measure relative distance, Total – to measure total distance between two opposing surfaces.

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