开云体育

yes, it works

You could probably save 200 bytes of RAM by adding the keyword const before the wag arrays.

Hi, Tom I have tried to implement your code to ATU-100, but not enough RAM unfortunately. But I did it for ATU-10 so everyone can try your algorithm and compare it with mine.

Hi, Tom. The original algorithm will try all the 64 steps for L and C when the initial SWR more then 9.99. It is not important actually, because an antenna with 9.99 SWR it's not an antenna so no any

Still a little rough, but here is a prototype (also checked into github) for a new tuning algorithm using the optimized starting points. There's still some bugs that need to be knocked out and the

That part (along with the ULN5841 used by the SG-237) are obsolete. Several of the MFJ tuners (939/991B/993B/994B at least) use an A6812 20 output port expander, then separate transistors. I did find

Also, to be clear, I’d think the best strategy would be to run through a set of fixed wild a$$ guesses roughly corresponding to the ones determined by my algorithm until a non 9.99 SWR is found, the

When I ran your algorithm, I found a number of times where it just didn’t tune. Most of those were where it missed finding any hills in a wide plains of 9.99 SWRs. ?Please excuse the geographical

Tom, my algorithm do almost the same but stop after find the best value, it is faster then try all the 65 tries with no stop. Why you think this will work better ?

Just checked in an update that adds a mode that I'm calling 'battleship' to find a close to optimal search pattern to begin the hill climbing. I think the search pattern suggested is a little more

I have an older version of this display, works fine by default. Definitely you need to switch to i2c mode and also try to put Res pin to gnd or 3.3 volts.

Many thanks to David who has taken the time to assist an old duffer like me. All this programming stuff is right on the very edge of my knowledge and skil set. It seems to be all working, and tested

Are you familiar with the TI TPIC6B595? It's an HC595 with 150mA MOS outputs.sdcx Clark Martin KK6ISP

Seems to lock up in coarse_cap when I tried to run it. On a different subject of improving the algorithm in general, by looking at the LC maps at the different test points and where your tuning

David,? ? ? ? ? ?Many thanks.?This is the displayI have done a lot more reading, and not sure what I did, but got the 0.96" going on your firmware.? But is a bit small for my old eyes!Have the

Show us a picture with your new bigger display ?

Hi, Geoff 00 cell equal to 00, as you show But it should contain I2C address Looks like all the cells are shifted right starting 00. What you need to change in defaults? 00 - 78 01- 04 or 05 30 - 01

Yes, create a new thread, upload main.h I will see

The tune.c from the ATU10 works quite well on my ATU100 but not if the cap required is higher than about 1750 pF.? For example, my antenna tunes to swr 1.3 on 80m with ind/cap/SW set to 22/124/0 but

David et al, Thanks for that link. Progress so far: Have managed to extract the soldered in chip, and replace with a holder and a new chip without damaging the pcb. I have looked at the info you