Moderators: Dave Moll, Steve Anderson
Harry Dalek wrote:I think this could be used for a replacement for a crystal clock say on your multi system ramp generator...
Harry Dalek wrote:You could pretty much have every line rate used last Century i don't think there were 64 of them...
Harry Dalek wrote:...And also do away with syncing on a monitor altogether with a programmable clock if you could tweak the frequency to the hz ..
Steve Anderson wrote:There's probably a few other items I put together that may not have been published for some reason. I'll have a dig around and see what I can find. Some I may have only sent to the NBTVA, some only to the BATC, and some to both. I guess I should have kept a record of who I sent what, and if they were published.
Steve A.
Steve Anderson wrote:OK, I'll have a rummage around in my hard drives when I can, you never know what may turn up!
Thinking on this oscillator further, it's possible to add a standard 12-key keypad that has the usual 0-9 digits, "#" and "*" for front-panel frequency entry. Though this would require a micro with more I/O pins than the 14-pin PIC16F688. It would probably have to be a 28-pin device, though a 20-pin micro is a possibility, say a PIC16F690.
Steve A.
Steve Anderson wrote:My initial thought was to select the output frequency via a PC, but it is a bit cumbersome. Adding the keypad makes it a stand-alone instrument though I'll keep the PC connection for when it's required. That way you could do an automated frequency response check for example.
With just the keypad there's no indication that you've entered the correct digits, i.e. it has no display. One could be added but it increases the complexity, I'll think on it...I guess it could be optional.
Steve A.
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