Hardware

@Nca78 said in Anyone using a low-voltage motor controller?: @NeverDie how low is the voltage ? L9110 can go down to 2.5V and is ultra cheap on ali, else there are also plenty of DRV8833 (min 2.7V) breakout boards it seems ? Thanks! :) They're so cheap that I ordered both of them just to have them on hand for the future: https://www.aliexpress.com/item/DRV8833-2Channel-DC-Motor-Driver-Module-Board-1-5A-3V-10V/32709948530.html?spm=a2g0s.9042311.0.0.9ar2Ko and https://www.aliexpress.com/item/10pcs-lot-L9110S-DC-Stepper-Motor-Driver-Board-H-Bridge-L9110-for-arduino-Free-Shipping-Dropshipping/32251090078.html?spm=a2g0s.9042311.0.0.9ar2Ko Meanwhile, for expediency, I ordered two different kinds from Pololu: https://www.pololu.com/product/2990 and https://www.pololu.com/product/2960

@JWB I think you should try to ask in his topic to get a reply ;) that said, his design files are not from Eagle.

@Nca78 Thank you for your answer! I wil test and I will update, if any... For the capacitors, yes, I use 40V rated. What's your hint on select them? Thank you another time :)

Hi...i am a new user here. I built a RFM69 gateway and a node.I decided to place the RFM69 node in a basement storage room. The room has been flooded a few times historically, so being able to monitor humidity in the room seems like a good idea.The room has thick brick walls, which the RFM69-433MHz radio is much more capable to handle than the nrf24. Still, I wanted to keep an eye on the signal strength. Because of this, I added code to the gateway to report RSSI from the node. circuit card assembly

For the charger: http://www.ebay.com/itm/MPPT-Solar-Controller-3S-12-6V-Lithium-Battery-Charging-18650-Charger-Module-zhn-/332313023330 For the battery: http://www.ebay.com/itm/1-3S-11-1V-25A-W-Balance-Li-ion-Lithium-18650-Battery-BMS-PCB-Protection-Board-/272761561101 You need a balancer to charge Li-Ion batteries in series, hence the addon board. It also protects against overcharging, over-discharging and overcurrent. You could also buy a battery pack with integrated balancer/protection: http://www.ebay.com/itm/Portable-DC-12V-20000mAh-Li-ion-Super-Rechargeable-Battery-Pack-US-Plug-Lot-MU-/162662798231

@maciej initialization of the radio failed. Quadruple check your wiring, assure the radio is powered from a stable 3v3 supply. If all looks fine test with another module.

Just minutes ago i got it working on the ZERO/M0 MO, MI and SCK connect to the ICSP pin header: https://www.arduino.cc/en/uploads/Reference/ICSPHeader.jpg the CE and CS on defined pins example: #define MY_RF24_CE_PIN 9 // specific for my arduino zero #define MY_RF24_CS_PIN 10 // specific for my arduino zero Thanks

@Samuel235 Nice with the same circuit right?? which is in 2nd pic?

Thank you guys, I will just update the gw without messing with the node

@NeverDie Perhaps but the design is a bit too simple and unoriginal. I'd have to clean up the files a bit and I haven't touched Eagle since I made this board several years ago.

@exilit One test report should cover it. I say should as it is really up to the Certifying Body to determine it any further reports are necessary. These could be FCC (radio frequency reports), LVD, CISPAR or statements that report the use of certain products used in the manufacture and disposal of the PCB, Components, Solders etc. Certifying is a very comprehensive process and I think that any advice I give you really is only an opinion as requirements will vary. My feeling is that you should obtain professional advice from a Electronics Engineer who has all the answers to the questions you ask before proceeding any further. In answer to your points, you should be able to obtain certification on a device that has an additional interface, however, the device that interfaces may also need certification or may already have it. Doing it yourself I meant as a a DIY project, oddly if you offer it as such then there appears to be no obligation on your part to seek reporting or certifying advice. Sell it as a kit and buyer beware.

I know this may sound weird, but I would recommend just going with the basic Sonoff switch and skip the MySensors part. I build a lamp controlled by MySensors a long time ago, has external Tact button for on/off. Works great, took a while to build and I have an ugly box screwed to my lamp now that houses it all. I wanted to build another, but didn't want it be be aesthetically displeasing. I ended up using these (https://www.itead.cc/sonoff-wifi-wireless-switch.html) and they are everything in one small package. You have wifi, a tact button for manual on/off, and it will report to any home automation system using MQTT after flashing some customer firmware (https://github.com/arendst/Sonoff-Tasmota). Just cut the power cable, screw into appropriate terminals and it's all good to go. As much as I love MySensors; for this type of project I think there is a better solution.

If you want to order PCB, maybe try -Removed by moderator-. They provide rapid prototyping. Their minimum order is at least one board, the board is of good quality. To Poland about four or five days. They now have activities. Can be paid on delivery.

Thanks for the responses. I guess I'll try a simple RFM repeater up there instead, and wait to see if bridging becomes available.

@dbemowsk Relevant and good quality information. I fully understand what has to be done. Now I have no excuse to at least test a drive ... Thanks

The aaduino now has a new brother, the aaduino zero. Has anyone looked at it?