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Messages - LukeZ

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Open Panzer Help / Re: Having problem with IR Battle
« on: September 23, 2018, 02:20:00 PM »

Open Panzer Help / Re: Having problem with IR Battle
« on: September 23, 2018, 01:04:09 AM »
That is a very strange problem that doesn't make sense. Something is amiss with your setup. Obviously the second connection scheme that you describe is correct in terms of backwards and forwards. However, a right turn is always a right turn. The TCB sends the same right turn signal no matter whether you are stopped or moving.

I would connect to OP Config and click "Read Radio." Now move your throttle and steering stick and make sure the direction that you move the stick is reflected in OP Config - see the example below where I have moved my throttle forward and steering to the right, and OP Config shows Forward and Right. If OP Config does not match the actual direction, you should Reverse the channel(s) until it does. Then you may need to re-arrange the motor wires to your ESCs.

The other thing to be sure is that your ESCs do not have a brake setting turned on. They should be forward/reverse, not forward/brake/reverse.

See if any of that helps, and post back your results.

You should be good to go with all that!

Have you ever tried using an Arduino to program the bootloader?

I personally have not tried that but there are tutorials online. A USBASP is only a couple dollars and would be less hassle. Another thing that makes life so much easier is an ISP pogo-pin adapter like this one from SparkFun.

Another thing that can make your life much easier, are pre-crimped JST PH cables, such as these 6" from Digi-Key: 455-3082-ND

Combine with the easy-to-source 3-pin JST PH plug housings (you can find them on eBay and all over the internet), and you can quickly create the three-pin data cable that goes from the TCB to the Scout or Sound Card. Here they are at DigiKey for reference: 455-1126-ND

The larger JST XH cables that are used to provide power to these boards are much easier to find pre-made online and they are also large enough it is usually not a problem to crimp them by hand. But crimping the tiny PH connectors successfully is a near impossibility unless you have the exact right crimping tool.

From the photos that looks like a very good job and I expect you will find the board to be electrically sound.

Of the three designs the TCB is the most difficult to assemble due to the extremely small pitch of the processor. On the Scout the pin spacing on the processor is much wider and even if you do have some bridged pins they are simple enough to correct afterwards by hand with an iron and some flux.

The one possible pitfall to avoid when assembling the Scout is not to have too much paste on the large heat-pads of the motor driver ICs. If during reflow those short, it will not be good because of course afterwards you can no longer visually examine the underside of those chips, if they are shorted they will fry the chips, the chips are very difficult to remove without damaging the rest of the board, and they are the most expensive components. But from your photos I think you will be fine. You'll notice I also sized the stencil to be smaller than necessary on those heat-pads precisely to help avoid getting too much paste there.

If I had to be extremely nit-picky I might recommend taking one more pass with the scraper to try to get the thickness of the paste down as thin as possible, from what is shown in your second photograph. But again I think you will be fine. Most times the paste is very forgiving and during reflow will clean itself up where previously it looked a mess. However the less paste to begin with, the better.

You are correct, if you won't be using the RC functions you can leave those pins off.

Hopefully you are familiar with flashing the bootloader which must be done before anything else, afterwards you can upload firmware using OP Config as normal. There are various instructions available on the internet and it may also have been discussed already on this forum but if you have questions let me know.

Open Panzer Help / Re: Assembling Boards by Hand
« on: September 20, 2018, 07:59:16 PM »
Looks good! Anyone interested, here is Paul's assembly thread.

They look good in red too! I designed the whole website around the shade of purple used by OSH Park, but in the end Hobby King sells them in a crummy hue that is half pink.

Good luck with the assembly, I'll be following your progress.

Open Panzer Help / Re: Having problem with IR Battle
« on: September 20, 2018, 04:40:05 PM »
Ok, thank you Baichow because in the end you actually have identified a bug. The Taigen boards should accept 5 hits before being destroyed. This was confirmed for me by Imex-Erik over at Taigen. I have posted a new firmware update that should correct this problem (v0.93.42). You can download it and flash your board from within OP Config.

Long explanation for those curious: with the exception of Taigen, all other manufacturers send their IR signal multiple times for each cannon fire event. The purpose of this is to make it more likely for the receiving tank to detect the hit. The number of repetitions, and the length of the signal to begin with, all vary by manufacturer. Tamiya is the worst, they have a long signal and they repeat it 50 times, which equates to one full second. This has enabled the infamous Tamiya "fan-shot." It does make it easier for the opposing tank to register the hit, but maybe is a bit excessive.

On the other hand, Taigen is at the opposite extreme. They have a very short signal and they only send it once. Total time is 1/100th of a second for V2/V3 boards (was even shorter for V1 boards). When I first encountered this I thought, let's have the TCB repeat the signal several times, the way every other manufacturer does. I set it to repeat 6 times which is what Heng Long does. But this was a mistake, as you can now see. The Taigen board will register all six hits instantaneously, and since that is more than 5, it goes straight to destroyed. The other manufacturers, and the TCB, all know to ignore subsequent hits for a brief period of time after the first complete message is received, but the Taigen was never programmed to do so.

In short, the original problem is that I made what I thought would be an "improvement" based on an "assumption" about the way other manufacturers did things. And in fact, it caused this bug instead.

The fix was simple - tell the TCB to only sends the Tagien IR signal one time per shot. You should now be able to shoot your Taigen 5 times before it registers as destroyed.

Thanks again for helping me pinpoint this problem, and my apologies I didn't recognize it sooner. You were right to begin with!

Show and Tell / Re: Finnish Stug III Ausf G Project
« on: September 20, 2018, 01:24:54 PM »
In my experience motor selection for these models is not as great as you will find for RC crawlers. The best way to slow down the model is to change the gearbox. I assume you are using the stock Heng Long gearbox.

The highest reduction gearbox I am aware of is the "5:1" gearbox, it used to be made in brass by Asiatam but that has sadly been discontinued, however you can still buy it in steel version from or and maybe other places as well if you look around. I have not had a problem ordering from Germany to the US and I assume it would be just as easy from Australia.

You can also limit the maximum forward/reverse speed in OP Config but of course it is best to get a realistic driving speed with gearbox selection if possible.

Open Panzer Help / Re: Having problem with IR Battle
« on: September 20, 2018, 01:17:41 PM »
Normally, Taigen VS Taigen is not one shot one kill, it took many shots before destroyed. So that I try to change OP setting into match number hit with original Taigen board.

Ok, that is interesting. In my testing Taigen always dies after 1 hit (ie, engine must be restarted). How many hits does your Taigen take from another Taigen before being destroyed? What Taigen versions are you using?

Taigen IR is a very strange thing. There are three versions of the board as we know (V1, V2, and V3) and each one uses a slightly different IR signal. In fact, I have also identified two variants of the V2 board (I call them V2-A and V2-B) and they also use a different IR signal! In every case the IR signal is close, but not exactly the same. There are also two versions of the Taigen IR receiver (early green board and later red board). It seems to me Taigen has not cared very much about IR functionality and have been very sloppy with development and compatibility.

Show and Tell / Re: Tamiya Gepard(Cheetah) SPAAG
« on: September 18, 2018, 02:09:02 PM »
Yet another very unique build. This will certainly test the limits of the TCB's functionality, but then again, this is precisely the unusual case it was designed to work with. I will be interested to see what you come up with.

Open Panzer Help / Re: Having problem with IR Battle
« on: September 18, 2018, 02:05:06 PM »
You absolutely can use the TCB to battle with Taigen tanks, as you have demonstrated yourself. If you want it to be a fair battle, you should set the TCB to also become destroyed with 1 hit. You can do this under the "Custom Weight Class" on the Battle tab of OP Config, and then selecting the custom class on the TCB using the dipswitches.

We can not change the behavior of the Taigen board, it is what it is. But you can of course change the behavior of the TCB to match it.

Show and Tell / Re: Finnish Stug III Ausf G Project
« on: September 18, 2018, 12:40:57 AM »
Very nice! I love all the variants of the PzIII, it is probably my favorite tank of all time. This is a very interesting subject you have chosen, and you are off to a great start with the paint job. I will be watching this build with interest.

One other feature that has been requested and which I've finally added are "sound banks," which are basically like playlists on your MP3 player (note the sound card requires WAV files, not MP3s).

With the latest firmware update the Sound Card features two banks (A & B) of up to 20 sounds each. Unlike the user sounds which you select directly (for example, "play user sound #7"), with the sound banks you control the list with options like "play next," "play previous," or "play random."

As always there is a specific nomenclature required for your file names, you can read about that in the Wiki at the links I provided above. Sound banks are available both in RC mode and when used with the TCB (when you select the Open Panzer Sound Card in OP Config you will see new sound bank functions added to the function list, and then you just assign triggers to them as usual).

With all the changes that have been made recently I wouldn't be surprised if some bugs have crept in, so if anyone notices odd behavior please let me know here in this thread.

I'd like to do some more testing of these changes but hopefully I am nearing the end of physical development on this device, and then we can turn our attention to possibly finding someone willing to manufacture it.

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