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DIYA store "Wolverine" (Son of Badger) .... suggestions ??
DIYA store "Wolverine" (Son of Badger) .... suggestions ??
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Old Today, 02:59 AM   #981
ostripper is offline ostripper  United States
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Default Ice cubes and fire symbols ....

And run all this , soft-start, temp , V/I , DC with (below).

Bias could get ice/smiles/ and flames. Just seen
the GUI development apps for ESP32 w/ ST7735 color display.

Watch your cap banks charge with a battery icon (soft start phase).
Fancy , fancy.

OS
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File Type: jpg ST7735.jpg (104.0 KB, 209 views)
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Old Today, 09:18 AM   #982
Vostro is offline Vostro  South Africa
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For anyone new to ESP8266 not not new to programming. Here is an example of a small clock I made for my desk at work. The library versions indicated much be used. Im not using the new json parser.

Just an example of handeling webpages to be served by the esp itself.
This project creates its own Access point and does not connect direct to internet. I did not spend much time on making the webpages it serves to be pretty. But they are nicely viewable on PC and mobile.
Instead the user logs into the wifi hotspot provided by the esp.
Attached Images
File Type: png first box v38.png (229.7 KB, 173 views)
File Type: png message.png (9.5 KB, 167 views)
File Type: png Time.png (9.8 KB, 161 views)
File Type: png Datepicker.png (16.6 KB, 160 views)
File Type: png settings.png (20.0 KB, 36 views)
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File Type: zip 2018_Scrolling_Message_v3 Example.zip (3.79 MB, 13 views)
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Old Today, 12:18 PM   #983
jwilhelm is offline jwilhelm  Canada
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My binary to decimal conversion was messed up, I missed a bunch of values in there. I think in this case we're better off to use switch statements instead of doing straight binary conversions because there would be some messed up steps in the resistance values.
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Old Today, 12:22 PM   #984
jwilhelm is offline jwilhelm  Canada
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If you want to run a display with it we're far better off running dual microcontrollers, one for protection and one for display and toys. Reading IR commands while running a LCD is problematic, both time consuming operations so they don't play well together.
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Old Today, 12:59 PM   #985
Krisfr is online now Krisfr  United States
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Making it a "State" machine, will solve both situations.
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Old Today, 02:03 PM   #986
neilshop is online now neilshop
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Click the image to open in full size. Yeah , I was worried
I was using something like this on mine ...
https://www.semicon.sanken-ele.co.jp...1186_ds_en.pdf
Along with 3 pair of the big MT-200's.
1.5k - R110/100R - R111
No issues.

My similar HK680 uses 2sa1837/2SC4793 , but with only 2 pair of
120W sankens.
1.5k/220R as predriver/driver Re's.
No issues here , either.

OS



I know this is out of sync with the current topic, but I'm trying to get an understanding of my options for the output devices. Based on post #317, I'm intending to use Sanken 3264/1295's, as they're sitting in a box looking for a good home. Wolverine looks like a great fit. My novice view is that I really wouldn't have to make any other component changes, with the exception of biasing needs. Any thoughts/help on this would be greatly appreciated.
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Old Today, 02:37 PM   #987
Holgi is offline Holgi  Germany
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Quote:
Originally Posted by jwilhelm View Post
Reading IR commands while running a LCD is problematic, both time consuming operations so they don't play well together.
If we stick to the ESP, you can just run separate tasks and assign appropriate priorities. Im running 8 tasks in my hay feed controller and it works quite well
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Old Today, 08:10 PM   #988
Bonsai is offline Bonsai  Europe
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DIYA store "Wolverine" (Son of Badger) .... suggestions ??
Perhaps what you want to consider is to use the existing bias controller and tap of two connections to a separate bias controller that would then fine tune the bias to correct for ambient and/or allow switching say between class A, AAB and AB. Very easy to write some code in C++ to cal the bias controller and set all this stuff up. You can make it fail safe.

This leaves those that want a stock Wolverine to build as is, and those that want extra features to add the bias board.
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Old Today, 10:29 PM   #989
ostripper is offline ostripper  United States
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That is how it is , Bonsai.
Don't populate OPTO 1 , primitive it will stay.


You would not want to have any true (wired) external bias control , as the Vbe is
output and +/- 2V. As a mains like but high Z signal , keep it tightly confined
to the Vbe "cage".

The opto is just a precision fine tune of the existing main bias trimmer.
Luckily , default is still the trimmer. I set up my simulations with default
at 40mA , where the window of very low distortion begins at high power.
Sankens even do better AB @ 50mA , ON 70 - 80mA ... different silicon.

(below) is what range a 100K trimmer in series with a 47K would give
hooked to a 5V supply (though the OPTO). the bottom (40mA) step is what switching the
opto out of the circuit entirely would have.

I saw your EF3 Vbe , single device Vbe's are adequate for EF2's.
My oldest amp , Sansui EF3 .... set it high cold (80mA) , has negative Tc.
Ends up 40-50mA when hot. HK , 80mA .... 0C to 70C (+/- 3-4mA).
Drops that 3-4 from 40C-70C.

So , just a front panel control. 110mA limit , I noticed no issue running
5 of these same designs anywhere within this range.
Best to leave any automated (or refined) bias control to a micro. Just
toggling a few preset steps would be as easy as kids lighting up LED's
with a Arduino. ESP32 , seen a kid on his phone triggering leds over wi-fi.
OS
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File Type: jpg Vbe pot.jpg (156.5 KB, 6 views)
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Last edited by ostripper; Today at 10:33 PM.
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