Nixie thermometer

nixie-60

Luca Dentella has build a Nixie thermometer to measure the temperature of the liquid cooling system, file are available on Github.

I decided to log the design and the development of the project in ten blog posts. They show my “divide et impera” approach: I divided the whole project in small tasks (drive a nixie with Arduino, read the temperature from a thermistor, use an rgb led module, prepare the first prototype on a perfboard, design the pcb, assembly the final product), all described on my blog with examples and videos.

Nixie thermometer – [Link]

 

How to build your own 8×8 led matrix

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circuitspecialists.com has published a new guide on how to build your own 8×8 LED Matrix on a prototyping board. In a later guide they will show how to program it using an Arduino Compatible board.

Today we will be starting our adventure into the deeply complex, yet totally incredible world of LED Matrices. This post will be the first of an entire Arduino Matrix Programming series by Circuit Specialists.

How to build your own 8×8 led matrix – [Link]

USBpicprog – a free and open source usb pic programmer

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USBpicprog is an open source Microchip PIC programmer for the USB port based on PIC18F2550. PC Software, Firmware and Hardware are open source and available for free.

The hardware is built around a microchip PIC18F2550, this microcontroller has on board USB capabilities. The schematic and PCB have been designed in Kicad, an open source EDA solution
The PCB files are available in Gerber format and the schematic in pdf in the download section so that you can open them with your favourite tool.

USBpicprog – a free and open source usb pic programmer – [Link]

Adding touch screen to Siglent SDS1022c Oscilloscope

SAM_4383

morethanuser.blogspot.com has a guide on how to add a touch screen on a Siglent SDS1022c Oscilloscope. For that purpose he used an Arduino Nano and a touch screen panel from Prestigo 7″ tablet. He discuss about the keyboard protocol, the display driver and the touch screen and shows us how to make it work as an alternative interface for his oscilloscope.

Adding touch screen to Siglent SDS1022c Oscilloscope – [Link]

Microchip cloud-based development platform launches

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Microchip Technology announced MPLAB Xpress, a new cloud based development environment to provide an easy way to get started with PIC microcontrollers.

Microchip Technology Inc. (NASDAQ: MCHP), a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, today announced its MPLAB® Xpress Cloud-based Integrated Development Environment (IDE). This online development platform is the easiest way to get started with PIC® microcontrollers (MCUs), with zero downloads, sign-in or setup needed to start designing. Microchip’s free, cloud-based IDE brings the most popular features of the award-winning MPLAB X IDE to Internet-connected PCs, laptops or tablets.

Microchip cloud-based development platform launches – [Link]

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Organic solar cells set new efficiency record

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The German company Heliatek has developed new OPV multi-junction solar cells with an efficiency of 13.2%. This is a world record for organic solar cells.

Thanks to the excellent low light and high temperature behavior of the organic semiconductor, the electricity generation of the newly developed cells corresponds to the output of conventional solar cells with 16 to 17% efficiency when both are under real world conditions.

Organic solar cells set new efficiency record – [Link]

Easily measure diode capacitance and reverse recovery

1N4002 zero Vf bias ll 120pF

Glen Chenier @ edn.com wanted to find out the characteristics of an unknown diode to be able to replace it with an equivalent one so he decided to make some measurements using his test equipment. In this article he show us how to measure the junction capacitance, Cj, and reverse recovery time Trr of a diode using a function generator and a 100Mhz oscilloscope.

Easily measure diode capacitance and reverse recovery – [Link]

Record-setting flexible phototransistor revealed

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Researchers at the University of Wisconsin-Madison have revealed a unique phototransistor that is flexible and faster and more responsive than any similar phototransistor.

The innovative phototransistor could improve the performance of myriad products — ranging from digital cameras, night-vision goggles and smoke detectors to surveillance systems and satellites — that rely on electronic light sensors. Integrated into a digital camera lens, for example, it could reduce bulkiness and boost both the acquisition speed and quality of video or still photos.

Record-setting flexible phototransistor revealed – [Link]

Weather Station Project with ATMEGA328P, DHT22, BMP180, BH1750 and a Nokia 5110 LCD

This is an Arduino powered Weather Station Project that can run on batteries for almost a year! In order to achieve that we use a bare ATMEGA328 chip along with some accurate sensors. We use the DHT22 temperature and humidity sensor, a BMP180 barometric pressure sensor, a BH1750 light intensity sensor and a Nokia 5110 LCD display. We use the low power library in order to greatly reduce the power consumption of the project and we disable the lcd display when it is night.

Weather Station Project with ATMEGA328P, DHT22, BMP180, BH1750 and a Nokia 5110 LCD – [Link]

How to Read a Datasheet

NE555

Here is a PDF document written by D. Grover, explaining how to understand a manufacturer’s datasheet. It goes through the 555 timer IC datasheet and gives an explanation on various parts.

How to Read a Datasheet – [Link]

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