openrcforums

To measure the current we need a opamp .

I'm trying to find one that is not $1.50 in a mini package.

I will look at encoder inputs.... These are for a shaft encoder ....
I didn't think a high speed interface was needed ....but If I can , I will hook in.

-Brent

Here is what I can do...

I will add a 32khz xtal to port pins.

Move trim switches to two of the EX1, EX3 port pins.

Free up EX2 for A/D use. Add a ground Sense resistor.

Move the input cap/resistors over to the Digital output connector., for Rotary encoder / external switches.....

-Brent

People asked for SD-card support. The first design just has a spot for a connector to access the SD -Card in SPI mode. The Rev B, has a spot for a Micro-SD socket , and full 4 bit data line support. There is no current use for the card...it is for future expansion. It could hold "models" o...

Nice Stuff

Now I'll never be able to pick one.

-Brent

The Smoking Resistor tells you something is wrong . :shock: Also lets you measure the current draw.... I have put a couple of through hole pads next to the part , so it is easy to short / replace. The other thing is the Fuse cost , is about $0.30 compared to $0.001 for the resistor. It all starts to...

How About these?
-Brent

hdwf900 wrote:Maybe that had been already discussed and I missed it but can you tell me if the Optex display is compatible with the original eEX9 board?

Sylvain.

No its not , the ribbon cable has the contacts facing the other way.

-Brent

How about just putting the 32kHz xtal on the relevant CPU pins, then the internal RTC could be turned on. Handling the power so the CPU could be put into deepsleep mode (3uA) and keep the RTC running may be a challenge if required though. Mike. It would worK ... If I use a through hole xtal..... an...

Please no chip with built in battery (except it has a pin for an external battery).
I had to throw away a motherboard, because the built in battery of the RTC chip was exhausted.


Reinhard[/quote]

Don't worry , no on-board battery .

-Brent

If the Tx can run normally without RTC and most things wouldn't need it, and if you can setup the board so the addition of an RTC module is relatively easy, then it becomes the choice of the end user to add or not, which I think ties in with the whole idea of what we are doing here. Bill Yes , ther...

How about just putting the 32kHz xtal on the relevant CPU pins, then the internal RTC could be turned on. Handling the power so the CPU could be put into deepsleep mode (3uA) and keep the RTC running may be a challenge if required though. Mike. It would worK ... If I use a through hole xtal..... an...

If you are using the main tx battery to power the RTC, then you run the risk of discharging a LIPO too low if the tx is not charged for a long time, same as leakage for a power switch. Vbat to the RTC is specified as max of 5.5V, are you supplying the full battery voltage? Would a supercap be usefu...

I'll come up with a drawing , and the part numbers...

-Brent

I did look at using the Bridge... If I drop the RTC chip , I have room for a Schottky 1A Bridge...Losses would be fairly low. The battery would plug into the Bridge and this could supply power to the whole Radio. It might be a better solution. The RTC chip needs a battery backup ..witch is the inter...

This is along the idea....
http://www.rcgroups.com/forums/showthread.php?t=1411877

-Brent

Yes , you could use the I2C interface and a 4 line touch panel IC , The problem I see, is the size of the Screen , and the size of your fingers. Do not make for too many buttons... There is a input connector on the board that can handle 3 extra switches. This could be a Rotary encoder , with a push ...

looks good, does the time response of this screen is better than in the stock radio? i had a jr 3810, and the pixel response was superb compared with the 9x one. Lets just take a look for example when moving the stick in the graph menu of dual rates and expo, its so slow that almost looks an invisi...

The Bluetooth module needs to have a serial input/output , and must support SSP (simple serial protocol)

-Brent

Here is what the LCD looks like.

-Brent

The Dropout on the Regulators is 1.4V max. The 5V regulator is for the LED Backlight , to keep a constant brightness. The rest of the board runs at 3.3V The RF module will dictate the minimum supply voltage. As Mike said the Board is quite happy at 6.5V , so you could get a full cycle out of a 2S li...

I have access to both sides of the power switch on the PCB , we could use a transistor to allow the micro to hold the power ON
until you are ready for shutdown.

-Brent

@ Skynorth , Is it possible that this cheapie bluetooth module will do? http://www.ebay.com/itm/30ft-3-3VDC-Wireless-Bluetooth-RF-Transceiver-Module-RS232-TTL-/360418062721?pt=LH_DefaultDomain_0&hash=item53ea973181 Best regards , Hasse. The module looks close...but I dont think it is pin compat...

RCPlaneHobby.com wrote:is there a link to this board on the wiki yet? I'd love to see a feature list and price

We are currently doing a Beta run of 25 boards , there are a couple left ...price will be $85 + shipping.

I will write up a Spec sheet on the new board...

-Brent

Mechcondrid wrote:how much is everything to source? (i.e. all the parts needed?)

The board is being sold assembled ...for $85.

-Brent

This might seem like a no brainer but does the board have reverse polarity protection? I was just changing my batt in mine today and that occured to me. I think other things might get fried but is the board protected? Also when I get back I'll post a pic of the ErSky 9X logo I came up with. I spent...

There is a spot on the board for a 16 pin (0.05") ribbon cable. This contains all the LCD signals , plus a extra chip select signal. So you could tie into this and drive a larger LCD or two lcds. There is also a I2C port , which could also tie into some LCD displays. The Hardware can do this , ...

The Lcd ribbon fits into a connector on the board....just like the stock one.. The module needs to be taken apart . The LCD glass is double sided taped into LED backlight. The Plastic frame is keeping the LCD from sitting up high enough in the Display window on the radio. The Glass fits in place , l...

Hi, We can use this area to talk about the new board design. -Brent Here is a Feature List: input voltage 6.5 - 16 volts (7.2V ideal) Atmel SAM3S ARM Cortex M3 Microprocessor 256K of Eprom , 48K Ram 4mb EEprom - For Model /sound storage Support for Optrex display F-55472GNFJ-SLW-AAN Built-in externa...