Moderators: Dave Moll, Andrew Davie, Steve Anderson
Steve Anderson wrote:Which shipping method did you select? I can't find any except the real expensive options for delivery to Thailand...seems the same for Australia.
Steve A.
Steve Anderson wrote:Which shipping method did you select? I can't find any except the real expensive options for delivery to Thailand...seems the same for Australia.
Steve A.
Andrew Davie wrote:Here's the item I purchased. Currently the cheapest price (including shipping!) that I can find. Just over US$21
DSO Shell Oscilloscope from AliExpress
Steve Anderson wrote:Well my two $15 specials arrived today, I've only opened one package and it's a fake. No serial number/sticker and the fonts are different as JYETECH indicate.
The LCD display is loose to, just flapping around on its flexible PCB connector, not fixed to its PCB. Nothing a spot of super-glue won't fix though.
I hope to get around to building them anyway during the course of the coming week - I'm up to my neck at the moment with 'real work'.
Steve A.
Steve Anderson wrote:I've just realised that the screen backlight LED is fed from the input (unregulated) supply. This is probably where most of the input current goes, by altering the value of R36 you can alter the screen brightness and/or save some current in battery-powered applications. Higher values than 180R = lower brightness and currents.
For more efficiency in battery-powered applications use a CMOS 555 with variable PWM to save power in the backlight. More in due course.
For the time being I'll continue to build it as supplied.
Steve A.
gary wrote:Hacking it before building it? Great stuff Steve.
Steve Anderson wrote:Something else I have considered...this micro can run at higher speeds, replacing the crystal with a 16MHz version should double the bandwidth. But with the current software the horizontal scales will be a factor of two out. Where it might say 500us/div it actually will be 250us/div. Again, something for the future.
Andrew Davie wrote:I get the feeling it's a very small company, but they are very responsive.
Steve Anderson wrote:Andrew Davie wrote:I get the feeling it's a very small company, but they are very responsive.
If it is a small company, like my own, every little outside suggestion does help. Some - the most - are worthless, but sometimes there's the answer we have been looking for in house. Not often, but it has happened.
Who knows where this may lead?
Steve A.
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