Tag Archives: tube

Geiger counter with SBM20 tube


by weirdlab.fr:

I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, i have put this one inside a 32mm diam plastic tube, for more convenience, wired through a XLR3 cable. This counter is from “Electronique-Pratique” n°368, a french electronic magazine. Shem, pcb, and PIC hex & C source code available.

Geiger counter with SBM20 tube – [Link]

Wireless Nixie Thermometer


by christian.ich.7 @ instructables.com:

The Target of this Project was to learn how to use different functions of the atmega:

• Connecting two Atmegas with a wireless connection
• Each Atmega has a Thermometer (DS1621) to read the actual temperature
• Use the sleep Mode of an Atmega
• Controlling a Nixie bargraph In-13

Wireless Nixie Thermometer – [Link]

Nixie Tube Clock


by Pete Mills :

If you’ve poked around the internets where electronics hobbyists collect, it is likely that you are acutely aware of our incontrovertible affinity for building timekeeping clocks. It is similarly unlikely that you have been able to evade the plenitude of nixie tube based projects. There is a reason for this.

Nixie tubes are cool. They have great aesthetic appeal with their difficult-to-photograph, warm orange glow, and dem curvy numerals. They add an organic je ne sais quoi to a hobby with ostensibly digital design cues. Further, they pose technical challenges in the way of producing and switching the ~175 V DC needed to light each tube element. And as far as I am aware, there are no new nixie tubes being produced; as such, procurement can be a challenge unto itself. My N.O.S. nixies came from Russia thru Ebay, and only 3 were duds. Incidentally the seller replaced those 3, FOC.

Nixie Tube Clock – [Link]

Project Tube


Ioannis Kedros @ embeddedday.com:

Why this long intro? Well, I am an engineer, a maker in general, that wants to build stuffs. And the swags above came in a nice cardboard tube. A very strong, thick, with a nice light plastic type coating (helping with the moisture during shipping).

This makes a good indoor enclosure, but with proper treatment will be a nice fit for an outdoor enclosure as well. I am going to put a Raspberry Pi inside it together with a camera and some sensors for reading environmental variables.

The RPi is the Model B and has some connectors around it that I am not going to use. Those are taking space and placing the Pi slightly offset of what I want. I decided to remove them and use some of those in future projects. Nothing is going to the trash bin! Anyway, I am not going to use this Pi to somewhere else. The project will be placed permanently in my “lab

Old School Tube Watch


Johannes’ Numitron GeekWatch features Numitron tubes housed in a hideous 3D printed case:

Numitron tubes are cut-down version of Nixie tubes, but instead of having a wire-mesh anode with a cold-cathode display, uses a seven-segmented indicator commonly found on digital meters and clocks.


Old School Tube Watch – [Link]

6v6 Stereo Amplifier


by epweb.angelfire.com:

Most of the work that I have done in the past with vacuum tube and solid state electronics has been repair. So, I have ventured into the realm building. This is actually my second build (I’m still getting the bugs out of the first attempt) but I have applied all that I learned from mistakes to this build. Building from scratch is nothing like repairing. It takes time, a lot of thought and reasoning go into a build no matter how simple it may look.

6v6 Stereo Amplifier – [Link]

DIY Geiger counter


by Henrik’s Blog @ hforsten.com:

Ionizing radiation is something that almost anyone finds exciting (or scary) and I’ve also been for long wanted to build a Geiger counter. Unfortunately Geiger tubes have usually been too expensive to seriously consider buying them just for a hobby project. But I found out that sovtube sold soviet cold war era Geiger tubes only for a couple dollars. I bought one CI-22BG tube and one CI-3BG tube for total of 16€ including shipping from Ukraine to Finland. The site itself didn’t really convince me payment via Paypal failed because of invalid seller email address and gmail warned me that order confirmation e-mail might not have come from the address it claimed. However, I got both of the tubes and they seemed to be okay.

DIY Geiger counter – [Link]

Nixie tube clock


Tom Cousins of DOAYEE made this DIY nixie tube clock:

Below is the schematic for the project, as you can see I’m using 6 IN12 nixie tubes, each with it’s own 74141 nixie tube driver. These drivers are great! They simply connect directly to the nixies and display whatever 4 bit binary number you give them (if you give them anything above 9 they blank the display – hence why I use the number 10 in my code to blank the nixies). Because they take in a simple 4 bit binary number, I can hook them directly up to some shift registers to drive them, in my case I used 3 74HC595 shift registers (available everywhere), because they can be “daisy chained

Scientists explore mash-up of vacuum tube and MOSFET


by Nancy Owano @ phys.org:

Thumb-size vacuum tubes that amplified signals in radio and television sets in the first half of the 20th century might seem nothing like the metal-oxide semiconductor field-effect transistors (MOSFETs) that dazzle us with their capabilities in today’s digital electronics, say two scientists, but it might be time for fresh thinking about vacuum tubes and even some mashing-up for surprising results. Jin-Woo Han, research scientist, and Meyya Meyyappan, chief scientist for exploration technology, at NASA Ames Research Center in California, wrote an article that appeared in IEEE Spectrum on Monday, which details their explorations of a vacuum channel transistor. Their article indicates “vacuum channel transistor” is a phrase to watch in the context of what’s next in transistor technology. The what’s-next conversation is certainly one that continues.

Scientists explore mash-up of vacuum tube and MOSFET – [Link]

Tube Amplifier


by tinkering.graymalk.in:

The amplifier is based on the 12AU7 valve (part number ECC82 in Europe). The schematic came from here, it’s a nice kit, but lacked a power supply and the layout wasn’t quite what we needed for kits in TinkerSoc. I added a LDO 12v regulated power supply, an input volume control pot and kept the design single layered (with one jump). The final schematic can be viewed here

Tube Amplifier – [Link]