This becomes relevant if you're trying to power your microphone off the biased voltage of the computer. The relevant part of the patent for this discussion is different input circuitry or specifically the bias voltages. The last link I have below is a US patents for a different kind a microphone not relevant for this discussion.
Then regarding the computer they're all different. Guitar pickups are typically piezo it require a different type of preamplifier to work with the computer. Then the reality is you don't need the circuit because computers have that built as it was designed for capacitive microphone. I have a image below of what capacitive microphone circuit looks like internally. The reason your circuit does not work with the guitar mic pic up Is it's been designed for a capacitive microphone which has a built in amplifier. Broken watches or broken electronics, same sort of fun.
In the end, I don't really mind the fact I got nowhere, it's the life of DIY. General mics work but noise is always going to be an noise and you can't see things like the unlocking tick because it's so quiet. They are significantly quieter and that's why there are special purpose machines for these things. A reason why many professionals here use PCTM.īy the end of it, I learned that watch ticks are very different than instrument sounds.
Software TM are not only used because they are low cost, but because some offer much more analyzing tools than the Chinese and don't show false results in certain situations. The mentioned thread has many good microphone concepts, simple and sumptuous ones. If a normal mic works: fine, but probably just by chance with your special equipment. If it does not work, blame the tinker, not the piezo. So even for hobbyists because of the affordable price the Chinese machines or the software if you get everything to work they have become must have tools.ĭiy microphones are a problem if you think, you need no electronic skills to develop/ build one. Then as a reminder especially because the person asking the question is new to the group a timing machine is used for more than timing it's a diagnostic tool. For an out-of-the-box solution for something that works with a microphone that rotates in multiple positions the price is very reasonable. Pricewise the 1900 is just under $200 1000 is around $150 typically on eBay and there's a dealer that sells these in the US at $120. Both machines are really decent 1900 has a slightly nicer screen. But the Chinese make some really decent machines in particular theTimegrapher 1000 or 1900. To buy a decent Swiss machine will cost you several thousand dollars for instance. That's because originally hardware-based timing machines were very expensive.
Then one of the reasons software-based timing machines are popular is they range from free to relatively cheap for the most part. We've already had one discussion where the people trying to help were annoyed because the pickup was faulty and was giving false readings.work the software-based machines are nice. They're designed for audio pick up picking up the rate of the watch relatively easy getting the rest of the signals can be problematic at times. They are very specific frequency ranges for watch pickup versus the music industry.Ĭomputer-based microphones that includes the microphones found in cell phones with apps for timing. Then the preamp needs to be low noise and ideally should have some internal filtering. Then the popular piezo Discs have to be properly mounted to pick up the vibrations and still need to be shielded from audio because they will pick up audio. Some of the music industries microphones work the only problem is there designed for a greater vibration. The problem with most microphones are designed for audio pickups we want to pick up vibrations. There are quite a few challenges to get the software to work you need a proper microphone to pick up the tiny vibrations of the watch. Software-based timing machines are quite nice but as some of you a found out getting a proper signal in is a challenge.