Customer Comments

Here's the latest comments from our customers, if you've got comments that you think would be useful for others to read, you can also make a comment on the individual product or blog page.

  1. John M Clayton - Wednesday, 19 September 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    Hello Hadley. I have researched this further and it WILL work for a NPWT vacuum pump for treating wounds. My Orthopedic surgeon, and other Doctors go on "missions" regularly and would Love several of these made. I would be happy to do this for them. I was wondering if you could post a link to your Eagle PCB files and also a link to the Arduino code you used? That would be extremely helpful so I would not have to re-invent the wheel you've so wonderfully already designed. After I have the boards made and soldered up, I will send a link to a picture of them and a write-up of the project they were used for. Also, the vacuum version of the sensor is MPXV5050VC6T1 and is made by NXP USA for about $10 each. With 0 kPa vacuum on th port, the signal out to the Arduino would be about 4.96 VDC. At -50 kPa that signal is about 4.95 VDC, so, it would be 90 mV per kPa! That makes the math in the Arduino sketch so easy! And, it can be output and easily displayed on a small OLED display. Also, just doing math in the sketch, the kPa can be converted to in Hg; mm Hg, or even PSI! the user would turn a rotary encoder to select what units they want the reading in and then use an up and a down push button to set the desired setpoint of the vacuum they would like to maintain.

    I figure if I used new Atmel chips and program as you did with bootloader and code copied from one prototype, it would be very quick to mass produce and the cost would be, roughly about $30 per board. That is amazing. The Doctor said he can find donors to buy the parts. Thank you for designing such a wonderful board!

    Kind Regards,
    John
  2. John Clayton - Saturday, 15 September 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    I this is the vacuum version from DigiKey : https://www.digikey.com/product-detail/en/nxp-usa-inc/MPXV5050VC6T1/MPXV5050VC6T...
  3. John Clayton - Saturday, 15 September 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    Sorry for the duplicate posts. I did not know they had shown up on your blog.
  4. John Clayton - Saturday, 15 September 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    I am making a Negative Pressure Wound Therapy (NPWT) vacuum pump. This Freescale MPXV5050 and arduino seems PERFECT? Do you offer these boards for sale? Maybe just the PCB and a bill of materials. I can solder components myself. I can take the output of the pressure sensor to an Arduino Nano analog input and, in the code, provide an on-off output signal to turn a vacuum pump on and off at a specific vacuum level.

    Currently available NPWT pumps cost over $2,000!!! I had one rented from a medical supply house and an 18 inch long incision was healed completely in less than 4 weeks! I had a hip replacement. I would LOVE to make these for instances where war or other major catastrophes can help injured people heal faster.
    One question... if the Freescale MPXV5050 is a PRESSURE sensor, does it also register NEGATIVE pressure (vacuum)? Typically a NPWT pump is set to around -110 mmHg (or -.146 BAR or -2.127 PSI). Thanks for any help! email me if you post your answer here on your blog mankey1960@gmail.com
  5. John Clayton - Saturday, 15 September 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    I am making a Negative Pressure Wound Therapy (NPWT) vacuum pump. This Freescale MPXV5050 and arduino seems PERFECT? Do you offer these boards for sale? Maybe just the PCB and a bill of materials. I can solder components myself. I can take the output of the pressure sensor to an Arduino Nano analog input and, in the code, provide an on-off output signal to turn a vacuum pump on and off at a specific vacuum level.

    Currently available NPWT pumps cost over $2,000!!! I had one rented from a medical supply house and an 18 inch long incision was healed completely in less than 4 weeks! I had a hip replacement. I would LOVE to make these for instances where war or other major catastrophes can help injured people heal faster.
    One question... if the Freescale MPXV5050 is a PRESSURE sensor, does it also register NEGATIVE pressure (vacuum)? Typically a NPWT pump is set to around -110 mmHg (or -.146 BAR or -2.127 PSI). Thanks for any help! email me if you post your answer here on your blog mankey1960@gmail.com
  6. Hadley Rich - Thursday, 13 September 2018 on product Adafruit Ultimate GPS FeatherWing
    Hey Dean,

    No worries, looks like they should be here today or tomorrow.

    Cheers,

    Hadley :)
  7. Dean Ashby - Thursday, 13 September 2018 on product Adafruit Ultimate GPS FeatherWing
    Hi Hadley,

    Sorry, I'm being impatient, just curious how far away the Adafruit Ultimate GPS FeatherWings are? I've got a shopping basket full of goodies just waiting on this item to come back into stock.

    Cheers,

    Dean
  8. Lorenzo Decaria - Tuesday, 11 September 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hey, this is an awesome content! Where can I find a CN105 connector though?

    Thanks!
  9. Daniel - Thursday, 06 September 2018 on product LIDAR-Lite v3
    How well do these perform in a dusty environment?
  10. Hadley Rich - Thursday, 06 September 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi Jonathan,

    I don't unfortunately, they're used as some multi cell lipo balance charger cables which is probably the easiest place to get them.

    The prototype you can see has the cable coming from the JST cable which is everything, power and comms from the Mitsi.

    Cheers,

    Hadley
  11. Jonathan - Thursday, 06 September 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Do you still have some "JST PA series" connectors available?
    And what is the black connector on the prototyping board with the red, yellow, green, blue cables?
  12. Daniel - Wednesday, 05 September 2018 on product LIDAR-Lite v3
    How well do these perform in a dusty environment?
  13. SVZ Guy - Wednesday, 29 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    OK, I got it to work now.

    For anyone reading this who wants to make this work with a NodeMCU, you need a logic level shifter. A voltage regulator as seen in the schematics on the github site is not needed though. The NodeMCU has its own voltage regulator. I provide the 5V from the heatpump to the VIN on the NodeMCU and it is automatically stepped down to 3.3V for the serial input (RXD) and output (TXD). from there I run these to the 3.3V side of the logic level shifter. I bought one online that has 4 channels (using two of them). You need to provide 3.3V (from the NodeMCU), 5V (from the heatpump) and GRND. I still used the pullup resistor on the 5V side of it. Hope this helps.
  14. Hadley Rich - Monday, 27 August 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    Hi Yusuf,

    There are a few different models of the MPXV5050, some are designed for positive pressure, some for negative.

    Cheers,

    Hadley
  15. Hadley Rich - Monday, 27 August 2018 on product SiliconDust TECH4-2DT
    Hi William,

    Not yet unfortunately, I don't believe it's finished approvals for the area.

    Cheers,

    Hadley
  16. Yusuf - Monday, 27 August 2018 on blog post Building 100 Arduino Vacuum Pressure Gauges
    Hi Hadley,
    I was just going through the data sheet for the MPXV5050 and it shows it measures from 0-50kPa. Your write up shows the reverse, that is, -50kPa-0. How did you do it ?
  17. Hadley Rich - Sunday, 26 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    That could be an issue with some of them, I used a level converter in the original.
  18. SVZ Guy - Saturday, 25 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    also reported this as an issue, sorry for the x-post.

    In the schmeatics, I see a voltage regulator to step down the 5V from Mitsubishi heatpump C105 to the ESP8266. But I don't see any requirements that the logic on RXD and TXD must be shifted. When measuring I see 5V on RXD (from heatpump) and 3.3V on TXD (from my Nodemcu / ESP8266 chip).

    The result is that the heatpump understands my commands but the Nodemcu doesn't receive anything back, or at least nothing it can understand.

    So my understanding would be I should use a voltage shifter to step down the data I receive from the HP from 5V to 3.3V. And while I am at it, I should probably step up what I send to the heatpump from 3.3 to 5V.

    Does that make sense? I am surprised no one else reported this yet...
  19. William Gordon - Friday, 24 August 2018 on product SiliconDust TECH4-2DT
    Hey there - do you have pricing available for the TECH5-16DT at all?
  20. SVZ Guy - Saturday, 18 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Planning on connecting my SVZ unit with a NodeMCU + DHT22 temperature sensor so I can use the setRemoteTemperature. My understanding is that if this is set then it will SYNC every time. If I had querying the sensor and then updating the setRemoteTemperature in the loop followed by the SYNC, how often do I need to do this? As often as possible? Every 10 seconds? Every minute?
  21. Erik - Saturday, 18 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi Rob,

    Good job on the Mitsubishi Heavy Aircon."
    I'll give it a try in a couple of days.
  22. Hadley Rich - Thursday, 16 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi SVZ Guy,

    No idea sorry, I know nothing about those.

    NG Guy
  23. SVZ Guy - Thursday, 16 August 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi,

    I have an SVZ unit (Air handler in Attic) currently running on a MHK1 thermostat. Going to try this out with my unit.

    Once I disconnect my MHK1 will the settings still remain, e.g. static pressure, that the unit stops running once setpoint is satisfied, etc?
  24. Matt Anderson - Thursday, 26 July 2018 on product SiliconDust HDHomeRun Connect Quatro
    Awesome as device, set it up with ease.

    Makes Plex better, the official HdHomeRun app is also great though.

    It is good for me since my house only has one good Ariel port, now that I have a 4 channel tuner hooked up to it, every tv actually gets tv lol plus the DVR function is awesome!

    Definitely worth the $$$
  25. Hadley Rich - Thursday, 26 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi MikE,

    No idea unfortunately.

    Cheers
  26. Hadley Rich - Thursday, 26 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hey Ken

    I think we have the GE series here rather than GB but I've really got no idea about different models in different countrys sorry.

    Cheers,

    Hadley
  27. MikE - Thursday, 26 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Is there a way to bypass errors of indoor unit , using it only as a ceiling fan etc. ? old mini split Mitsubishi outdoor unit broke down and i wanted to recycle indoor units good fan in my garage to circulate air but its going on stopping in erros after few minutes of operation because there is not outdoor unit attached .

    Sincerely
    MikE
  28. MikE - Thursday, 26 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Is there a way to bypass errors of indoor unit , using it only as a ceiling fan etc. ? old mini split Mitsubishi outdoor unit broke down and i wanted to recycle indoor units good fan in my garage to circulate air but its going on stopping in erros after few minutes of operation because there is not outdoor unit attached .

    Sincerely
    MikE
  29. Hadley Rich - Wednesday, 25 July 2018 on product Flush Diagonal Cutters
    Hi Chris,

    We've currently got 1 in stock and would need to order 3 more.

    Cheers,

    Hadley
  30. Chris - Wednesday, 25 July 2018 on product Flush Diagonal Cutters
    Hi, notice only 1 listed as in stock. Do you have 4? Thanks
  31. Chris - Wednesday, 25 July 2018 on product Flush Diagonal Cutters
    Hi, notice only 1 listed as in stock. Do you have 4? Thanks
  32. Kenneth Dixon - Tuesday, 24 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi Hadley, thanks for the work hacking the heat pump.

    I thought I would give it a go with mine, but I am not getting any response back from the HP? I have tried a few things including AL's esp8266 implementation (https://github.com/SwiCago/HeatPump) with no luck.

    I tapped the serial signals with a serial to USB adapter and can see the data going out the the HP, but no response back.
    I also tried swapping he TX and RX lines, with no luck.

    My model is MSZ-GB50VA
    I see other people have had success with MSZ-F series and one with MSZ-GE80VA2

    Anyways do you have any suggestions on what to do in order to progress this further?

    Thanks, Ken
  33. Kenneth Dixon - Tuesday, 24 July 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi Hadley, thanks for the work hacking the heat pump.

    I thought I would give it a go with mine, but I am not getting any response back from the HP? I have tried a few things including AL's esp8266 implementation (https://github.com/SwiCago/HeatPump) with no luck.

    I tapped the serial signals with a serial to USB adapter and can see the data going out the the HP, but no response back.
    I also tried swapping he TX and RX lines, with no luck.

    My model is MSZ-GB50VA
    I see other people have had success with MSZ-F series and one with MSZ-GE80VA2

    Anyways do you have any suggestions on what to do in order to progress this further?

    Thanks, Ken
  34. Daniel - Tuesday, 24 July 2018 on blog post Auto generated, persistent MAC address for Arduino Ethernet
    When working with ESP8266 / NodeMCU, don't forget to add a "EEPROM.begin(6)" at the beginning and a "EEPROM.commit()" at the end of the read/write code.
  35. Hadley Rich - Monday, 16 July 2018 on product SiliconDust HDHomeRun Connect
    Hi David,

    Yes there's just one AU/NZ version.

    Cheers,

    Hadley
  36. David - Friday, 13 July 2018 on product SiliconDust HDHomeRun Connect
    Hi, is this product compatible between Australia and New Zealand? Or is there a different hardware model for each of the two countries?

    Thanks,
    David
  37. Hadley Rich - Monday, 18 June 2018 on product Flirc Raspberry Pi Case
    Hi Ethan,

    Our current stock is the version that was originally designed for the Pi 3, it's actually the same as the "new version" which is designed for the 3B+ the only difference is that the new version includes a slightly thinner piece of heatsink tape. I have some suitable tape here so if you're wanting one for the 3B+ just put a note on the order and I'll make sure you get it.

    Cheers,

    Hadley
  38. Ethan Rose - Monday, 18 June 2018 on product Flirc Raspberry Pi Case
    Hi Hadley,

    Is this the gen2 version which fits the Pi 3 B+.
  39. Rob Dekker - Saturday, 16 June 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Hi,
    It's been a while, but I've made quite some progress on getting serial communication going with a Mitsubishi Heavy Industries aircon. Had a lot of fun working on this and learned a lot...
    Getting an ESP8266 working as SPI slave was impossible for me. Ended up with an Arduino Pro Mini using an ESP8266 for WiFi/MQTT.
    Sending 20-byte frames pack to the MHI didn't work out. Ended up buying an official WiFi controller and found that the communication was a lot more complicated than expected. I'm a hobbyist and have no experience with serial communication at all, but there appears to be a high-level protocol on top of the low-level standard SPI. I can't for the life of me understand some of the design choices that the Mitsubishi engineers made.
    I wrote some code for the Arduino and ESP8266 and so far it works like a charm. Using MQTT to connect to my existing system: an RPi MQTT broker, connected to OpenHAB and Apple Homekit.

    Code is on Github:
    https://github.com/rjdekker/MHI2MQTT

    I've never shared any of my code so it might not be easy to follow even though I've tried to annotate it as good as I could. The read me is a bit of a mess at the moment and needs some work. Work in progress. Any help, suggestions etc. are appreciated...
    I hope those of you who are interested can get it working and maybe improve on it.
    Regards,
    Rob
  40. Hadley Rich - Thursday, 07 June 2018 on blog post Electricity Meter Usage over MQTT
    Hi David,

    I don't currently, we moved house quite a while back and I've not ever re-implemented it. I'd like to but haven't had the time.

    Coincidentally I noticed there was a power outage at our house yesterday and apparently it was because we had a smart meter installed. I'll need to check that out and see what it's like.

    Cheers,

    Hadley
  41. David Cole - Wednesday, 06 June 2018 on blog post Electricity Meter Usage over MQTT
    Do you still use this?

    I've just tried adapting the code for using the Homie Sensor convention: https://git.io/homieiot and http://marvinroger.github.io/homie-esp8266/

    It takes care of all the mqtt communication leaving you just to write the code.

    But what I'm writing about is if you have a wiring diagram for the photocell and any resisters used.
  42. Hadley Rich - Monday, 14 May 2018 on product SiliconDust HDHomeRun Connect Quatro
    Hi Dave,

    The current ETA I've been given is 2-4 weeks from now. This is from the first stock shipment in AU/NZ.

    Cheers,

    Hadley
  43. Dave - Monday, 14 May 2018 on product SiliconDust HDHomeRun Connect Quatro
    What's the ETA for arrival ?
  44. Hadley Rich - Monday, 07 May 2018 on product SiliconDust HDHomeRun Connect
    Hi Tim,

    I'm not sure what the T2100 is but the HDHomeRun Connect will definitely work with Plex!

    Cheers,

    Hadley
  45. Tim - Saturday, 05 May 2018 on product SiliconDust HDHomeRun Connect
    Hi everyone!

    Just wondering, we currently run an Aerial Box T2100 in Christchurch, will the SiliconDust HDHomeRun Connect HDHR4-2DT replace the T2100? Looking to integrate it with Plex Media Server.

    Thanks
  46. maffin - Thursday, 03 May 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    @Rob Dekker
    For me byte 11 = 02 for cases:
    -HEAT 3D AUTO
    -HI POWER
    -ECO
    Also for same cases byte 17 (bitfield) has bit 2=1 (04)

    For the rest cases byte = 00
  47. Hadley Rich - Wednesday, 11 April 2018 on product SiliconDust HDHomeRun Connect
    Hi, No just UHF broadcast (DVB-T - Terrestrial)
  48. Fea - Wednesday, 11 April 2018 on product SiliconDust HDHomeRun Connect
    Hi, will these work on a satellite dish?
    Thanks
  49. Adam J - Friday, 06 April 2018 on blog post Hacking a Mitsubishi Heat Pump / Air Conditioner
    Any idea where I can buy the bits like the connector, voltage converter etc. in Australia? I see from some of the links that bits needed to build an interface are available on Amazon or US sites but don't seem to ship to AU.
  50. Hadley Rich - Wednesday, 04 April 2018 on product Pololu 12V Step-Up/Step-Down Voltage Regulator S18V20F12
    Hi Roddy,

    Yes this one should work if your radio is under 2A or so.

    Cheers,

    Hadley