biomurph
biomurph
About
- Username
- biomurph
- Location
- Brooklyn, NY
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- @@safeforrobots
- Location
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Comments
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@rkennettWe have not done any internal work on this yet. There is a soft I2C library that might work out of the box? https://playground.arduino.cc/Main/SoftwareI2CLibrary
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@g_congo it does look like the RFD22301 is getting really hard to find.The module you link to, the RFD22302 is the same module as the 22301, it just doesn't have an antenna on it. You can use this as a drop in replacement for your purposes. Here's …
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@projectcyton1518 Yes, it is the case that the RFD22301 has gone EOL. If you need one, you may be able to find if you search Octopart? Regarding making the Cyton in a wired version, we don't officially support or encourage that, because of safety …
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@Jeff_B You can use the Ganglion to interface with the Pulse Sensor by accessing one of the Simblee analog pins.We have broken out analog pins A3, A4, A5, A6. Use any one of those. You will have to modify the sketch that you're using to make it …
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@pushtheworld didn't you get the BLED112 working? Can you replicate the issue?
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That is not an error I am familiar with. Please tell us what OS you are using, the version of Arduino, the version of the Simblee core, and what exactly you are doing to compile the code. Also, if you can share your code repo with us, that could …
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We are not able to create the file with windows yet. This process works with Macs to create the appropriate zip file, then you can use iPhone or Android to do the OTA upload. Alternatively, you can use the wired programming scheme at the end of th…
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We have not had one of those 8bit boards running in years. I would hazard that it will have a hard time working with the current GUI software that we provide.You should look back for an earlier version of software when you are testing the functional…
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@brainCurious Ah the 8bit board is still around! did you purchase from us back in the day, or did you make your own? The code for the radios can be found in the examples folder of the OpenBCI_Radios library. The sketch for HOST is for the radio…
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Well, the board photos look good. I am not sure what the issue is, but if you are seeing the same signal aberation with the oscope, then I would imagine it is coming into the system and not part of the system.
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Well, you are coupling both of the inputs with the biasout... I am not sure if that's a good idea. You would want to connect the biasout to the body biasout is the DRL, or driven ground. by connecting it to the inputs, I would imagine everything wou…
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@compujohnny Were you able to get the system to work after you installed the firmware?You are right. This should not have happened. We apologize and if there is anything we need to do to make sure your system is up and working we will be happy to o…
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@aaronjoh When you say that you are probing with an o'scope, please tell us where exactly you are probing? If you are probing the input pins (1N and 1P) and you are seeing the same signal, then could it be that the signal is coming from outsid…
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@mark.o.s Your image did not resolve....
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@petewallThis is a known issue. It is happening because you are using a mac. There is something to do with the Bluetooth hardware on the mac. We have solved this with the latest GUI v3.3.0, which is in beta. You can download it here https://github…
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@slackconsulting We are getting back to you on the email thread that you started with us. Based on the photo that you shared there, you are not connecting the electrodes correctly to the system. Your electrodes 9-16 are connected to the Cyton to…
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@petewall I have just reflashed a Ganglion here in my lab which has the similar setup to your drawing.0.1uF cap in series between the reset pins. TX to TX, RX to RX. GND to GND. Are you applying power to the Ganglion? You can use the 3V3 pin f…
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@petewallDid you program the Dongle with the pass-thru firmware? I'm going to run through this process to see if I can replicate your problem.
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Some things to check.Do you have the Dongle switch set to GPIO6? You are using the Dongle, so you may need to put a 0.1uF capacitor in series with the RESET pin. If you are still having trouble, swap the TX RX pins around and see if that works.
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@mark.o.sInteresting idea. In your schematic, you are connecting the 8N and 8P inputs together with the BIAS, so you will likely not se any signal, since they are tied together. Also, you are connecting the inputs together with the capacitor C4. T…
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@jeyem I do believe that there is no problem to connect the g.tec sensors via touchproof connector. The only thing to consider is that the analog power supply for the Cyton is +-2.5V (5V total). Another way to go about it is to use the analog i…
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@bpworkThanks for your thoughtful comments and dive into the MCP3912 spec sheet. Based on your remarks, it would be advised to use AGND as the 'reference' voltage attached to the inverting inputs of the MCP, as well as the voltage reference for the…
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The change made to the Ganglion BOM affects 4 capacitors in the Voltage Reference circuits for each input channel.The change was made in our production run on 3/15/17. The updated units entered our fulfillment warehouse in mid April of 2017. The …
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@nickplayThat work was done a long time ago, but I do remember that my measurement of CMRR involved inserting a signal of a known amplitude/RMS power level into both inputs of one of the differential channels, and then measuring the output amplitude…
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That's a good question. The Ganglion uses 3.0V for it's analog supply AVDD. the 'AGND' is generated by a voltage follower that outputs 1.5V (AVDD/2). There are Instrumentation amplifiers on the front end that have a set gain of 51, so if you ins…
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In the gif that you sent, it looks like the noise is occurring just about every second. This might be a software issue, since we run a compression algorithm that cycles every second. Can you try to update the firmware on your Ganglion board to see…
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The issue that Alex brought up in his blog has been resolved.We adjusted the RC filter to bring the 3dB cutoff down to 0.3Hz.
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It does look like the noise spikes that your seeing are around the 50Hz band. I can see that the filter is trying it's best to attenuate the spike, but it's not able to overcome it.I think you might be experiencing some very large environmental nois…
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@Devon, Please refer to the Cyton Getting Started Guide to confirm that your electrodes are connected to the proper pins. It looks like you are connecting to the TOP row, while our software and firmware defaults to the BOTTOM row for connecting …
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The process will be to create a .zip file with the Arduino IDE, then send it to you phone (email or dropbox, etc) and then use a Nordic Semiconductor app to do the Over The Air programming. Coming soon, I promise!