Date   
Re: Converting Black HEQ5

George Cushing
 

Sound fairly long to me. I use a lot of 136mm and an occasional 140. I prefer 48:16 tooth pulleys. A photo of you set up will help.

Re: Any spare pcb’s for sale

Ant No
 

It probably does sting but it's important information.

I hear they will populate surface mount components on the board for you as well; for little more than their local component costs ie cheap.

Only here say from another site. Not tried it.

Ant👣


On 28 Jun 2020 09:25, "Piers" <monsterguy@...> wrote:
On Fri, Jun 26, 2020 at 10:20 AM, Tom wrote:
The expected date to make them is 7/7/20.
 They were £48 for 3. 
Hopefully this isn't rubbing salt in a wound...

I ordered (different, but the same size) boards from JLCPCB a few weeks ago.
They arrived in the UK from China less than a week after ordering them and as a new user the total cost for 5 of each board was £8.26.

Re: SHC Connection issues

Howard Dutton
 
Edited

On Tue, Jun 30, 2020 at 07:32 AM, Howard Dutton wrote:
On Tue, Jun 30, 2020 at 07:11 AM, <Matthewabey@...> wrote:
So with that should I run ST4 ON_PULLUP instead of just ON with my teensy 3.6 max?
1. Always make sure the bused resistor network is installed properly.
2. Using ON is fine.  Using ON_PULLUP would work just as well.  Heck using ON_PULLDOWN would probably work fine too, but is not advised LOL.
The external bused resistor network in question here has about 10 or 20x lower resistance than the internal pull-up resistors.  So the internal resistors are (or should be provided things are assembled properly) irrelevant.

Re: SHC Connection issues

Howard Dutton
 

On Tue, Jun 30, 2020 at 07:11 AM, <Matthewabey@...> wrote:
So with that should I run ST4 ON_PULLUP instead of just ON with my teensy 3.6 max?
1. Always make sure the bused resistor network is installed properly.
2. Using ON is fine.  Using ON_PULLUP would work just as well.  Heck using ON_PULLDOWN would probably work fine too, but is not advised LOL.

Re: SHC Connection issues

Khalid Baheyeldin
 

On Tue, Jun 30, 2020 at 10:11 AM, <Matthewabey@...> wrote:
So with that should I run ST4 ON_PULLUP instead of just ON with my teensy 3.6 max?
I only observed that ST4_INTERFACE ON_PULLUP is required on the STM32. Could not make it work otherwise.
Though I have not tried recently with just ST4_INTERFACE ON to see if it works.

In your case, you are not on the STM32, so just ON should do it.
If you face trouble, then try ON_PULLUP and see if it makes a difference.

Re: SHC Connection issues

Matthewabey@...
 

So with that should I run ST4 ON_PULLUP instead of just ON with my teensy 3.6 max?

Re: SHC Connection issues

Howard Dutton
 

On Tue, Jun 30, 2020 at 05:59 AM, Dave Schwartz wrote:
P.S. Although I am pretty explicit with the orientation in the assembly instructions for the STM32 kit, I've still works with several who have installed it backwards
Perhaps it kind of works but not too darn well.

Installed backwards I think it goes like this:

RA- is then tied (through 2k resistors) to both 3v3 and (as a pull-up/down) to DE-,DE+,RA+.

If RA- gets pulled low DE-,DE+,RA+ all go low.
If any of DE-,DE+,RA+ get pulled low everything goes to ~1.6v (as a voltage divider through RA- to 3v3.)  If more than one of these are pulled low the voltage goes even lower.

For an SHC if it manages to make it into data mode the pull-up/down are "forced" since all four pins are driven as outputs.  The resistors will however add noise to the signal lines since the data in/data out/clocks are all weakly tied together.  It's difficult to wrap my mind around what that would look like or if it could possibly work at all; not worth the effort to really analyze it.

Makes me think about Khalid saying that the internal pull-ups on the STM32 ST4 must be on.  There is no reason that should be needed... on the other hand it might add some stability to the above situation since it would tend to boost the voltage levels a bit on the signal lines and turn what might be a logic low to the high it should be in marginal cases.

Re: SHC Connection issues

Dave Schwartz
 

P.S. Although I am pretty explicit with the orientation in the assembly instructions for the STM32 kit, I've still works with several who have installed it backwards:

**


*ST4 Resistor Network*

*

Install the 5-pin 2.2K ohm resistor network (ST4PULLUP). Pin one (the common pin) is the one on the left when looking at the side with the printing and the pins down (the one on the same end as the dot). Make sure pin one goes to the square pad (the one adjacent to J3).

*

On 2020-06-30 8:39 a.m., Dave Schwartz wrote:
In the case of the SHC, its usually reversal of the one on the controller PCB that causes the problem. The ones actually on the SHC are for the buttons and the auxilliary ST4 port.

On 2020-06-30 6:40 a.m., Howard Dutton wrote:
On Mon, Jun 29, 2020 at 07:37 PM, <Matthewabey@...> wrote:

    Thank you guys so much that was my issue, I had one resistor array
    backwards.

Glad you are up and running.

There was a note in the SHC Wiki build instructions about this already, it's now highlighted in yellow.
I also widened the SHC PCB silkscreen around the RPs' pin 1 to really make it stand out.

Re: SHC Connection issues

Dave Schwartz
 

Looking at all the PCBs, you probably could implement these with discrete resistors and that has been described several times over the years. You would start with the smallest (1/8w?) resistors you could find, mount them vertically in pins 2 through n and connect all the top leads together with a piece of 'L'-shaped wire going down into pin1. The pre-made part is just more convenient although it is a fair bit more expensive.

On 2020-06-30 7:52 a.m., Martin Bonfiore wrote:
If there is enough real estate you might consider laying out board for either resistor array or discretes.   There used to be dip resistor arrays that may be reversible...may not still exist in today's high density smd world.

Re: SHC Connection issues

Dave Schwartz
 

In the case of the SHC, its usually reversal of the one on the controller PCB that causes the problem. The ones actually on the SHC are for the buttons and the auxilliary ST4 port.

On 2020-06-30 6:40 a.m., Howard Dutton wrote:
On Mon, Jun 29, 2020 at 07:37 PM, <Matthewabey@...> wrote:

Thank you guys so much that was my issue, I had one resistor array
backwards.

Glad you are up and running.

There was a note in the SHC Wiki build instructions about this already, it's now highlighted in yellow.
I also widened the SHC PCB silkscreen around the RPs' pin 1 to really make it stand out.

Re: Onstep connection issue

Howard Dutton
 
Edited

On Tue, Jun 30, 2020 at 04:25 AM, <htcritch1998@...> wrote:
It uses a teensy 3.2 chip and esp8266 wifi module, Im trying to connect it to sky planetarium with the ascom platform but im struggling to get it to connect.
Problems with getting this feature going pretty much always come down to faulty hardware, bad soldering, or an incorrect setting (port not enabled or set to an non-default baud rate.)  There are also the very rare cases of an Android device that refuses to work or WiFi interference causing performance trouble.

We also try to document frequently encountered problems near the bottom the the WiFi Addon's Wiki page:
https://onstep.groups.io/g/main/wiki/7152

Re: OnStep / ASCOM - Realtime Telescope Position - 3D Visualization Software (free)

planetibo@...
 

Hi Rockmover,
Great development!
I am willing to be a beta-tester.

Re: SHC Connection issues

Martin Bonfiore
 

If there is enough real estate you might consider laying out board for either resistor array or discretes.   There used to be dip resistor arrays that may be reversible...may not still exist in today's high density smd world.

Re: SHC Connection issues

Howard Dutton
 

On Tue, Jun 30, 2020 at 04:23 AM, <Matthewabey@...> wrote:
Thanks Howard, and yeah it was an error/oversight on my part.
It happens.  It's also difficult as heck to see the pin-1 marking on the resistor networks specified so it doesn't exactly jump out at you.  I hate to move away from spec'ing Mouser.com parts and see no suitable alternatives there though.

Re: Onstep connection issue

htcritch1998@...
 

It uses a teensy 3.2 chip and esp8266 wifi module, Im trying to connect it to sky planetarium with the ascom platform but im struggling to get it to connect.


On Jun 30, 2020, at 5:17 AM, Howard Dutton <hjd1964@...> wrote:

On Tue, Jun 30, 2020 at 04:14 AM, <htcritch1998@...> wrote:
Ive recently put together an onstep system
Tells us about what you have there.

Re: SHC Connection issues

Matthewabey@...
 

Thanks Howard, and yeah it was an error/oversight on my part.

Re: Onstep connection issue

Howard Dutton
 

On Tue, Jun 30, 2020 at 04:14 AM, <htcritch1998@...> wrote:
Ive recently put together an onstep system
Tells us about what you have there.

Onstep connection issue

htcritch1998@...
 

Hi!
Im new to this group and am looking for some help. Ive recently put together an onstep system for a fork mount I built. I have everything hooked up right and I believe I have everything uploaded and flashed correctly but cant get it to connect to my computer. Im using a wifi module to connect to my computer. It shows up as Onstep in my wifi settings and lets me connect to it but thats it. I cant connect any planetarium software to it. I also tried the same thing with an android phone with an Onstep app and had the same results. Any help would be greatly appreciated. Thank you!

-Hyrum

Re: Lack of resources to buy or build mount controller

Howard Dutton
 

On Mon, Jun 29, 2020 at 01:25 PM, George Cushing wrote:
Is that an inductor next to the 5V regulator? Any particular value?
No inductors.  There's a speaker and bypass cap nearby.

Re: SHC Connection issues

Howard Dutton
 

On Mon, Jun 29, 2020 at 07:37 PM, <Matthewabey@...> wrote:
Thank you guys so much that was my issue, I had one resistor array backwards.
Glad you are up and running.

There was a note in the SHC Wiki build instructions about this already, it's now highlighted in yellow.
I also widened the SHC PCB silkscreen around the RPs' pin 1 to really make it stand out.