• RAK831 LoRaWAN Gateway
  • High Voltage inverter KIT
  • RN2483 / RN2903 Firmware upgrade guide
  • Simple IOT temperature sensor
  • Dragino LG01 LoraWAN Gateway

Tube: SBT-9 End Window Geiger tube

Pictures: This is a rare Geiger Muller tube with a mica end window that allows it to detect alpha, beta and gamma radiation. It is a good substitute for the LND712 (both pictured above) where a multi-radiatin type detector is required, yet its low availability makes it problematic for any developing project (see uRADMonitor-D). This source indicates the SBT-9 was used in Russian spacecraft: “Vernov and his associates frequently used…

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ESP8266 Troubleshooting

I got a few esp8266 modules back in 2014, shortly after they’ve been announced on HackaDay. I didn’t have much time for them, being caught with other projects, up until recently when the portable environmental monitor project needed a versatile wireless communication mechanism, low powered and if possible at a decent price. The esp8266 seemed the best candidate, but like with everything in life where nothing comes free, getting it…

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ILI9341 touchscreen LCD Library

I got a few QVGA LCD’s with resistive touchscreen for an ongoing project. All that was left to do was putting the driver code together. The LCD code part was very much similar to my previous work on the ILI9163 but this time I went for faster SPI communication (also due to the bigger resolution). The microcontroller – an Atmega128 – uses normal SPI transfer and the external quartz crystal…

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Tube: LND-712 End Window Alpha-Beta-Gamma Detector

Pictures: An excellent miniature mica window Geiger tube, suitable for detecting Alpha, Beta and Gamma radiation. As of 2015, it was selected for the uRADMonitor D series of radiation detectors. Details: Halogen quenched Geiger Muller tube, with a Mica end window making it suitable for detecting alpha beta and gamma radiation. Notes on sensitivity: The sensitivity of this miniature Geiger tube is amazing, placing it closeto the larger SBM-20. Most…

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Digital bench power supply

As a follow up to one of my earlier projects, the Variable regulated power supply, initially designed to deliver 0..30Volts at up to 10Amps, I have decided it was time for an upgrade. I kept the enclosure and the nice 250W toroidal transformer, and am reshaping everything as a new digital power supply with regulated voltage and current, short circuit protection, lcd display, buzzer for various alarms, temperature sensor on…

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Serial Digital to Analog converter (serial DAC)

Introduction We’re used to Analog to Digital converters (ADC) in a variety of applications such as voltmeters, thermometers or various other sensors. Their purpose is translating a given signal to a numeric representation. To handle numeric data, we encode it in digital, meaning all content is expressed by sequences of 0 and 1. A set of data is said to be continuous if the elements belonging to the set can…

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Comparison of dosimeters

Like with all measurements, it will be very hard to find two different devices indicating the same readings, especially when we demand increased precision. We now know that there are no such things as absolute time, absolute space, there are no synchronous clocks. It is the same with the absolute measurements, and in some cases it’s becoming more relevant to observe the change: if we see increasing values, we know…

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DIY Dosimeter Geiger Counter KIT1.0

Note: there is a newer version of this project, KIT1.1, see it here If I was to give this project a version number, the closest match would be the uRADMonitor model B. Finally an open source compact radiation dosimeter, that has an LCD and thus allows mobile use, but also comes with an Ethernet adapter so it can do radiation monitoring (uRADMonitor compatible). Yet, this is not quite the uRADMonitor…

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Atmega8 UDP Client

As a follow-up to Radu’s Atmega8 and enc28J60 for ethernet support article, I used the libraries to implement an ATmega8 UDP client using ENC28J60 that broadcasts a simple “Hello World” message over Ethernet. Circuit Diagram is exactly the same as simple web-server project(take a look at Schematic&Docs in the project folder). Do not forget to connect CS to PORTB2 if you are using Atmega8 and modify CS pin section in…

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Atmega128 Voodoo

Apparently I had no better inspiration on how to name this post. It all started with a nice sunny day, when I was in great shape for doing creative work. My plan was to do some research on the following uRADMonitor models B/C, to put everything together and start the design of the new device. With all the extra new features, it was clear I needed a microcontroller upgrade, from…

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Virtualmin Git return code 22 fatal: git-http-push failed

Installing GIT from Virtualmin is easy. You just need to go to Edit Server->Enabled features->Allow Git Repositories Create a repo by going to Services->Git repositories: Then go to Edit Users->select a user->Other user permissions and grant them access to your new repo: You are now ready to add your local code to the new repo:  cd ~/firmwaregit –bare initecho hello > hello.txtgit add hello.txtgit commit -m ‘initial checkin’git push upload…

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Tube: SI-22G (CИ-22Г) Sensitive Geiger Muller

Pictures: Details: The SI-22G is a highly sensitive hard beta and gamma radiation detector tube, made in USSR during the 80’s for the Soviet Military Needs by the Soviet Institute for Scientific Radiation Technology Research. Notes on sensitivity: This is a highly sensitive tube, thanks to its cathode material and relatively large size. It is perfect for monitoring equipment and DIY dosimeters, superior to the SBM-20 in this sense. The…

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Infused™ project

Infused™ is about passion for design, music, digital, programming and alternative culture in Timisoara, Romania. Structured as a set of interviews with people involved in the act of creation regardless of its final form, the first video covered Flat UI & Minimalism, featuring Madalin Gageanu and Adonis Raduca: I was excited to get an invitation to participate to the second episode. This time the subject was focused on Android software…

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