Search found 634 matches

by paul
Tue Dec 05, 2017 10:56 am
Forum: BBB
Topic: The reset button
Replies: 6
Views: 12228

Re: The reset button

Just add a switch somewhere on the piece and run wires back to where the missing reset switch is. If that's not the answer you were looking for, then you need to put a little more detail in your question please.
by paul
Sun Dec 03, 2017 2:32 pm
Forum: Hardware
Topic: BBleo? where to discuss?
Replies: 1
Views: 1826

Re: BBleo? where to discuss?

Tazling, There is a schematic of the board on Github - but you could be forgiven if you are confused by it - EagleCad schematics are often somewhat confusing as to the headers. a) is the BBleo supposed to power the bboard rail, or be powered by it? Power it - for use in sensors b) if the rail is liv...
by paul
Fri Oct 27, 2017 9:18 am
Forum: Sensors
Topic: Thermistor NTC6K523, replacement
Replies: 1
Views: 2122

Re: Thermistor NTC6K523, replacement

We don't sell it, please try digikey or mouser.

Paul
by paul
Sat Oct 14, 2017 5:07 pm
Forum: Hardware
Topic: Fluxamasynth Shield documentation?
Replies: 13
Views: 13624

Re: Fluxamasynth Shield documentation?

That seems to be a telescope driver? You want to make sounds for telescope interface?
You'll need to be able send MIDI info which just involves serial information at the correct baud rate. The rest is picking the characters.
by paul
Sat Oct 14, 2017 3:18 pm
Forum: Sensors
Topic: Pulse sensor problem
Replies: 6
Views: 6946

Re: Pulse sensor problem

We can't really support other people's hardware, especially without schematics and datasheets. My guess is that the sensor is just an analog output - it may be just a raw piezo element which you would need to condition with an op amp. From the discussion I read online that's exactly the case. They d...
by paul
Fri Oct 13, 2017 9:43 pm
Forum: BBB
Topic: The reset button
Replies: 6
Views: 12228

Re: The reset button

If you can't physically get to the reset switch it's useless for sure.

Paul
by paul
Sat Feb 04, 2017 5:29 pm
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 4709

Re: Is the LCD117 able to receive 3.3V logic signals?

jhornbr225,

The 3.3V signal won't hurt anything. It should work fine if you power from 5V. If you power from 3.3V then there it may or may not work depending on the generation of chip in the LCD117.
Make sure you use a 3.3V LCD or you won't know if the LCD117 is working.

Paul
by paul
Tue Jan 24, 2017 4:01 pm
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 4709

Re: Is the LCD117 able to receive 3.3V logic signals?

The LCD 117 SMD version has a schematic.
I believe I designed the LCD117 from a hand drawn schematic of Peter Anderson.

Brian Riley at Wulfden has a similar but not completely identical. The schematic may be found here
wulfden.org/downloads/manuals/K107manual.pdf

Pin 13 is PB7
by paul
Tue Jan 24, 2017 3:29 pm
Forum: Hardware
Topic: Can anyone explain the voltage drop?
Replies: 1
Views: 2060

Re: Can anyone explain the voltage drop?

glata123, the problem is your voltage divider, the high values you are using limit your current to about .3 mA not a useful amount of current. Your simplest solution is just to buy a 3,3V regulator. If you want to know how the math works, read through voltage dividers in the Art of Electronics or fi...
by paul
Tue Jan 24, 2017 3:19 pm
Forum: Sensors
Topic: wind sensor sudden drastic changes in output values
Replies: 1
Views: 2419

Re: wind sensor sudden drastic changes in output values

ladyk, Are you using the sensor in an enclosed space by any chance? Also is the sensor seeing only very small wind velocities? I'm thinking that there may be some thermal buildup going on somewhere. For the sketch to work in a calibrated fashion, it's important to use the RV (raw output) and not use...
by paul
Tue Jan 24, 2017 3:15 pm
Forum: Sensors
Topic: Issues with Pulse Sensor & Teensy
Replies: 7
Views: 4227

Re: Issues with Pulse Sensor & Teensy

JaseSerre,

You can check out the branch of our library at https://github.com/TJC/SI1143_Pulse_Prox_Sensors which will work with a Teensy I believe. I'm trying to get pulled into the Modern Device repo.

Paul
by paul
Sun Jan 15, 2017 2:15 pm
Forum: Hardware
Topic: BBB (rev.0) Voltage drop
Replies: 3
Views: 1742

Re: BBB (rev.0) Voltage drop

LimesPone, The problem is the 7805, that voltage drop is about right for that device. Grab a more modern LDO such as a LM2940 or LM9931 (5v model) and put it in and you'll be fine. However you need to carefully check the inputs and outputs with a meter and compare to the pinout of the device you are...
by paul
Sun Jan 15, 2017 12:56 pm
Forum: BBB
Topic: Can I run BBB at 3.3V?
Replies: 1
Views: 1839

Re: Can I run BBB at 3.3V?

enhering , The BBB's power input from USB runs through the LDO voltage regultor. So you would need to change the voltage regulator to a 3.3 version or short it out. One other issue is that the brown-out on the chip fuses is set to 2.7 volts I think, so the overhead is a bit low when running at 3.3 v...
by paul
Sun Jan 15, 2017 12:42 pm
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 4709

Re: Is the LCD117 able to receive 3.3V logic signals?

jhornbr225, Unfortunately I don't think we brought out a connection for the buzzer pin - the docs say pin 6 but I think I remember that this is PIC pin 6. You could code the buzzer in a tight loop then use a small speak in series with an electrolytic cap to probe the pins with - to quickly locate th...
by paul
Thu Jan 12, 2017 10:06 am
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 4709

Re: Is the LCD117 able to receive 3.3V logic signals?

#1 - Will it work properly? Is the 3.3V enough to be considered a "High" level?
Yes - as long as 3.3V is solid - I think it will work fine.

There are also some things to try if this turns out to be problematic, such as a level shift chip.

#2 - Will it damage anything?
No

Good luck with it.

Paul
by paul
Tue Jan 10, 2017 11:02 pm
Forum: Hardware
Topic: Is the LCD117 able to receive 3.3V logic signals?
Replies: 8
Views: 4709

Re: Is the LCD117 able to receive 3.3V logic signals?

JHornbr225,

I believe we tested the LCD117 at 3.3V and it ran fine.
You would need a 3.3V LCD - which we have in the shop BTW.
Most of them are pretty flaky at low voltage.

Paul
by paul
Fri Dec 16, 2016 6:18 pm
Forum: Sensors
Topic: Hot wire wind sensor tutorial?
Replies: 1
Views: 2392

Re: Hot wire wind sensor tutorial?

sandman,

You need to use our Arduino sketch that has software temp compensation. It's not that great but much better than no compensation.

We're still working on new models and new data.
by paul
Fri Dec 02, 2016 7:10 pm
Forum: Sensors
Topic: Wind Sensor Followup
Replies: 4
Views: 3142

Re: Wind Sensor Followup

Vicengineer,

If you're still listening, maybe call us if you haven't already.

Paul
by paul
Fri Dec 02, 2016 7:08 pm
Forum: Sensors
Topic: Wind Sensor (Rev P) Help
Replies: 1
Views: 2671

Re: Wind Sensor (Rev P) Help

Mike,

I think I answered this in another post.
Scale the windADunits appropriately 3.3/5.0

Paul
by paul
Fri Dec 02, 2016 7:06 pm
Forum: Sensors
Topic: Wind Sensor (Rev P) Help
Replies: 3
Views: 2885

Re: Wind Sensor (Rev P) Help

mstrange,

Try scaling those windADunits down by 3.3/5.0 and see what you get.

PB