Dee;
The difference in price is probably due to the fact that they do not sell many units, so any profit that they are going to make must come from just a few units. Time invested in trying to design a unit and selling only a few hundred units, raises their price a whole lot. I am retired from Boeing, collecting a pension, and kind of like linux, offering up my ideas for the betterment of those interested. The fact that my ideas are posted on the computer, does give proof of the date of my posting, that the ideas were mine.
As far as better, that statement will always be in the mind of the holder. But the apilus syncro mode, uses published durations of 0.002 seconds or two milliseconds. I have shown that by using the midi controller, that I can have pulses on for 0.001 then off for 0.001 and then turned back on again if desired. That is half the duration of the Apilus Platinum in syncro mode. In the time period of that modality, I could actually have two different levels, either rising or falling waveforms. As I have said previously, the frequency that the apilus is using is identical to Channel 14 on the CB Radio. CB shares this frequency with Medical Devices. Personally, I like the features that I am designing into this project. I like being able to view the waveform. Not everyone can afford or even know how to use an o’scope even if they had one. But one day, I found programs on the web on being able to use a sound card as a cheap scope. Since the pulses are 1 khz max, they will be able to be viewed on the scope. You will not be able to see each cycle of the 27 mhz signal, like I can on my Textronix scope but you should be able to see the timing pulses. If I can somehow get DC coupling, I will also be able to display galvanic currents as well. I have on purpose, tried to keep this project to already available kits, in order to make it easier for others to duplicate. The biggest hurdle, may be the software development. But there are programs already on the web that I am able to use.
One I am using is Bome’s SendSX, which allows me to send hex strings to the Midi adapter. Later on, I might make use of other midi software, especially if longer pulses are desired. In that case, duration will be determined by music representation. Meaning change in tempo will speed up or slow down the timing. That has caused me to try and learn a bit about musical representation. But the specifications were so much better with midi controllers than were available via sound boards, that direction changed to using midi instead of a sound card or trying to use a function generator. All of my tests so far, have left me very happy with this choice. Time will tell. I guess something can still come up to hamper this project, but for right now, this does seem to be extremely doable.