Recent Posts

1
Wirelings / imu 9 dof wireling sampling rate
« Last post by philip.rowe@STRATH.AC.UK on January 16, 2021, 12:56:40 PM »
Dear All, am loving the wireling IMU
I have a 4 socket wireling interface attached to a tiny zero processor, sd card for storage and a wifi shield to send the data once it has been recorded.
There are  4 wireling imus connected to the wireling sockets on the interface board
I am using the RTIMU library like suggested by Tinycircuits but this is no supported or updated.
I can currently read all 4 and send the data but at current am only getting 12-16 Hz or so for each imu
Do you know how I can speed up the sample rate to more like 50Hz to 1000Hz ?
Any help appreciated as I have been trying to do this now for sometime
regards
Phil Rowe
2
General Discussion / Re: NRFL01+ 2.4 GHz Radio Shield / Documentation missing
« Last post by WillemH on January 16, 2021, 12:35:15 PM »
Réna,

many thanks for providing the schematic.

It is clear now that the SPI related ChipSelectN is connected to I07 and the CE to I09.

In my project the 2.4 GHz radio was working well, but the MicroSD was not.
Even without radio functionality in the code the microSD was not working anymore, when the NRFL01+ 2.4 GHz Radio Shield was connected to the bus.

This has been solved by just securing the SPI bus before
 
    SD.begin(chipSelect)

by setting  I07 (ChipSelectN of the NRF24L01+ radio) as output and making it high.

So adding the following code at the start of the setup:

   pinMode(7, OUTPUT); 
   digitalWrite(7, HIGH);

This was sufficient to solve the problem.
Doing the same with the ChipSelectN of the microSD (I10) does not harm, but is not strictly necessary.


Regards,
Willem
3
General Discussion / Re: NRFL01+ 2.4 GHz Radio Shield / Documentation missing
« Last post by lennevia on January 11, 2021, 11:07:56 AM »
Willem,

Nice catch! The datasheets and schematics are in the correct repo, but for some reason, the schematic pdf is incorrect and I will get that fixed on the Wiki/Learn site and the product page today. Since the part number of the NRF24L01+ 2.4 GHz Shield is one away from the 433 Shield, it looks like a simple mixup.

The GitHub is updated with the correct file now: https://github.com/TinyCircuits/TinyCircuits-TinyShield-NRF24L01-ASD2163/raw/master/design_files/ASD2163.pdf

Thanks for letting us know!

Réna

4
General Discussion / NRFL01+ 2.4 GHz Radio Shield / Documentation missing
« Last post by WillemH on January 09, 2021, 04:58:06 AM »
I am busy with a project with GPS, MicroSD (for logging) and radio (downlink of selected data).

I have started with the NRF24L01+ 2.4 GHz shields for the radio link because of availability.
I am now facing some compatibility problems between radio and microSD, both acting with SPI. I hope it is SW only.

But looking for documentation I found that the schematic links in both shop and learn parts lead to the schematic of the 433 MHz Radio Shield instead of the 2.4 GHz Shield.

I am sure that  both schematics show differences with respect to the RF parts  but also with e.g. the SPI chip select, because the related RadioHead settings for chip select and interrupt pins are different.

The compatibility matrix does not provide indications of incompatibilities between MicroSD and NRFL01+ 2.4 GHz Radio Shields, but the related excel table is clearly another version with at least MicroSD & Audio and 2.4 GHz Radio Shields missing.

Can you provide me with the schematic of the NRFL01+ 2.4 GHz Radio Shield?


Regards,
Willem
5
TinyDuino / Re: TEMPERATURE / HUMIDITY TINYSHIELD I2C Communication
« Last post by lennevia on January 05, 2021, 11:57:11 AM »
The SDA, SCL, GND, and VCC pads can all be soldered to like you would normally make connections directly to an Arduino. So, yes, you can use them for connecting an additional I2C device.

I hope that helps!

Thanks,
Réna
6
TinyDuino / TEMPERATURE / HUMIDITY TINYSHIELD I2C Communication
« Last post by ColorfulCarrot on January 04, 2021, 06:52:40 PM »
Hello all,

So I have a stack of tinyduino boards. I have a sensor that I need to send information from to the processor board using I2C lines. I have the proto board which works but for the purposes of my project I cant have the proto board on top of the stack so I cant connect the lines from my sensor to the stack using this method.

I have a temperature/humidity tinyshield connected to my stack. This board has 2 external SDA/SCL lines. My question is, can I connect my sensor to these lines on the temperature sensor board to communicate to the processor board?

Thank you!
7
General Discussion / Re: where is TinyTV IR receiver?
« Last post by lennevia on January 04, 2021, 01:44:52 PM »
Hello,

The IR Receiver is located at the top of the TinyTV on the MicroSD and Audio TinyShield. Looking at the picture on the product page, it would be the black square at the bottom of the board: https://tinycircuits.com/collections/audio/products/microsd_audio-tinyshield

When installed in the TinyTV, the chip is at the top of the TV case.

You could try using a fresh battery in the Tiny Remote, but since the enclosure blocks the receiver, you may only get around 12" of reach with the Remote at that point.

I hope that helps!

Thanks,
Réna
8
Hi, I have an Arduino MKR1000 working with a lithium-ion rechargeable battery pack  (7.4V) in a toy car. I need the 7.4V so I can power the Arduino and the other peripherals attached to it. I would like to place the car on a charging plate to wirelessly recharge.  I plan to get the induction charging coils. Is there any hardware from TinyCircuits that I can use to help me achieve this setup? Will greatly appreciate any guidance. I am open to switching to NiMH batteries if that makes it simpler.

I noticed this charger (link below) but it is for 4.2V, not sufficient for an Arduino. Is there a 7.4V version?
https://tinycircuits.com/products/tiny-battery-charger?_pos=1&_sid=9df44ebf1&_ss=r

9
General Discussion / where is TinyTV IR receiver?
« Last post by mcdandm on January 02, 2021, 02:04:44 PM »
I received a TinyTV kit for xmas and got it all assembled and working  except the TinyTV only responds to the remote if I aim it directly down the microUSB port in the top. Is this normal or have i blocked access to the receiver somehow?

Thanks
10
TinyDuino / Re: TinyZero Smartwatch Screen stops working
« Last post by lennevia on December 30, 2020, 06:21:24 PM »
Have you tried the original example for the TinyScreen from the getting started tutorial? https://learn.tinycircuits.com/Display/TinyScreen_TinyShield_Tutorial/
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