non musical endeavors

Description: There are other chips or programs that perform blanking and fading effects from the side, similar to those seen in ballpark signs. This particular design does not include that feature, but further exploration is planned. The clock operates in slot machine mode every few minutes to prevent cathode poisoning. The second setup utilizes two 1-2W Velleman mini amplifiers with improvised microphones and small loudspeakers functioning as earphones, powered by a 9V battery. The sound level was adequate for use at speeds of 100 km/h, though earplugs were necessary. Driving fast with a motorcycle is not particularly quiet. The use of a quality preamplifier reveals the limitations of most consumer-grade equipment. For instance, a Mackie mixer, which includes 16 preamps, equalizers, buses, and sends, is priced comparably to one high-quality preamp, highlighting the disparity in quality. While Mackie products have been used for years without issue, acquiring a quality stereo pair is deemed essential. Using a consumer preamp may degrade the audio signal. A good preamp can significantly enhance the sound quality of an SM57 microphone. The impact of running synthesizers through high-quality preamps is also of interest; it is unclear whether they contribute to a fuller sound or merely add subtle enhancements. The differences may be more pronounced when the preamps are pushed hard, or the distinctions may be minimal at line level. Efforts were made to operate a Russian driver chip, but the intended functionality was not achieved. Grounding or supplying a small voltage to each of the four input pins on the integrated circuit was expected to determine which cathode of the Nixie tube is grounded. However, grounding all four inputs resulted in all cathodes being lit instead of producing a zero. The regulation is achieved using the control voltage of a 555 timer, which varies the clock frequency. This approach is stable and efficient, although using a chip like the MC34063 for a stable clock frequency or a microcontroller would be more appropriate. Nevertheless, the current solution is effective and cost-efficient. The same circuitry has been adapted to design a 0.35W guitar amplifier using Russian subminiature tubes, which has become the primary guitar amplifier in a home studio without clock noise issues. The 555 timer has proven to be quite useful. An old Fluke voltmeter utilizing Nixie tubes was discovered, prompting interest in building a project involving Nixie tubes, possibly a clock, due to their aesthetic appeal. Access to Nixie tubes has become increasingly limited, with many sourced from former Soviet countries and rising in price, particularly larger tubes like the IN-18s. Additionally, a couple of EM-80 magic eye tubes are on hand, awaiting a VU meter kit to create a stereo unit with one tube for each channel. Although it was possible to design the power circuit from scratch, safety concerns with high voltages have led to the decision to purchase a pre-built solution for the time being.

The described circuit involves various audio amplification and display technologies, primarily focusing on the integration of Nixie tubes and audio preamps. The use of Velleman mini amplifiers provides a compact solution for audio output, particularly in environments where mobility is essential, such as in a motorcycle setting. The 555 timer's implementation for regulation demonstrates versatility in circuit design, allowing for both audio applications and Nixie tube control.

In the context of synthesizer integration, the choice of preamps can dramatically alter the tonal characteristics of the output signal. High-quality preamps are essential for preserving audio fidelity, especially when dealing with dynamic microphones like the SM57. The discussion around the Russian driver chip highlights common challenges in interfacing with older technology, where pin configurations must be meticulously understood to achieve the desired output.

For projects involving Nixie tubes, it is crucial to consider the necessary high voltage requirements for operation, which typically range from 170V to 200V. The circuit design must incorporate appropriate power supply considerations to ensure safe and reliable operation. Additionally, the integration of magic eye tubes as visual indicators can enhance the aesthetic and functional aspects of audio equipment, providing real-time feedback on signal levels.

Overall, this project encapsulates a blend of vintage technology with modern audio practices, emphasizing the importance of quality components and thoughtful design in achieving optimal performance.There are other chips or programs that do blanking and fading in from the side which is a cool effect. Like the signs at the ballpark. I don`t think this one does that particular trick but I intend to find out! The clock goes into slot machine  mode every n minutes to avoid the dreaded cathode poisoning (of your cat).

The second one was two 1-2W Velleman mini amplifiers with improvised mics and small loudspeakers as earphones, driven with a 9V battery. It was loud enough to work in 100km/h, not much more but we were using earplugs. It is not very quiet to drive fast with a mc. randy909, I think when you use a quality preamp you begin to realize how crappy most of the consumer stuff really is.

Think about it, if you buy a mackie it has 16 pres in it and eqs and busses and sends etc for the price of 1 quality pre. That should say everything right there. I`ve used mackies and similar for years so I have nothing against them but getting a quality stereo pair is essential in my opinion.

I would say that using a consumer pre is actually degrading the signal. A good preamp can make an sm57 sound phenomenal. I`m sure they make a world of difference with microphones, but I was wondering about your experiences with running synths through them. Are they the secret to that big  sound, or do they just add a little top-end sweetness Maybe the difference (compared to your mixer) is more obvious when you push them a little bit, or a lot.

Or maybe line-level is line-level and there difference is very slight I was trying to get the Russian driver chip to work but couldn`t unravel the mystery today. I thought all I had to do was ground or supply a small amount of voltage to each of the four input pins on the IC.

The combination of lo/hi on these pins determines which cathode of the Nixie is grounded, but it wasn`t working properly. All four inputs grounded is supposed to produce a zero and it produced all cathodes lit. :- The regulation is made using the CV control of the 555, which actually changes the clock frequency, but in this case that`s not a problem, and this regulation proves to be pretty stable and efficient.

Of course it would be more appropriate to use a chip such as the MC34063 (stable clock frequency) or to use a µC, but this solution is already working well and is dirt cheap. I used the same circuitry (or barely tweaked) to design a 0. 35W guitar amplifier using russian submini tubes, and I don`t have any clock-noise issue. This amplifier is actually becoming my main home-studio guitar amplifier. The 555 is pretty handy after all! Oh, and i found an old fluke voltmeter using nixie tubes as a display in the thrash of my working place.

I might give a try to Nixie too, they look damn fun to play with :D This reminds me that I need to build something with Nixies. Not sure what yet, probably just a clock. They look so cool that I have to use them in something! @Schrab! What kind of parts do you have access to All of the nixies seem to be coming from former Soviet countries and they are getting expensive!

Especially the large tubes like the IN-18s. @gslug: I`ve got a couple of EM-80 magic eye tubes here waiting for a VU meter kit to arrive ;-) Should be fun. It`s going to be a stereo unit with one tube for each of the L/R channels. I admit it. I could have built the power circuit from scratch, but since we are dealing with high voltages here and I`m not exactly the most experienced electrician, I figured I had better leave this for a future project and just buy something that works.

Getting it all fitte