The WORKBENCH part 1


#361

if I win the lottery …


#362

what resolution are you looking for then … you can meassure a few micro amps


#363

My multimeter has a 60 microampère range, but then its internal resistance is around 1k !
For the 6 milliampère range it is still 100 ohm.
So burden voltage becomes an issue. That is the reason for using a device like the µCurrent.


#365

LOL


#366

Nice one, reminds me of this project


#367

signed up for COLLOS … want to test that TTN integration myself :sunglasses:


#368


the rotary knobs arrived, start looking like an old ipod now :sunglasses:

I realised that I don’t have enough I/O and memory onboard of this Leonardo Pro Micro ATmega32U4 8MHz 3.3V , I will use an extra 32 kb F-ram to hold the menusystem, logging data, stored saved ‘packet push profiles’, general device key/application settings, framecounters ect.

And back to RN2483A in this version (that can run the TTN uno library).
Also I will stick to my 'one button rules all ’ design, so for switching the device on/off I’ll use this module

My problem is always that during working on something I get new ideas to improve/extend… like now I think, an onboard GPS would be nice to so I can use the devcice as a tracker… a lipo charger with indicator onscreen, graphical things to show RSSI/SNR ect.ect. and this is often the reason that some projects never see the end :rofl:

hardware more or less done… time for the firmware

  • while the big flat rotary knob looked nice, it don’t work very well.
    I ordered new knobs 36 mm and thick for a better grip.
    the alu will be spraypainted later… someday :wink:

#369

still have a bunch of those cheap waterproof tempsensors, the DS18B20
never tried them with deepsleep actually… what happends with OneWire/deepsleep ?


#370

huh… 433Mhz ? :crazy_face:


#371

(Deux Vis) #372

I bought one from http://www.simonselectronics.co.uk/ in November, but now that store seems in maintenance mode. No luck for you, sorry.


#373

LoRaCHESS : The idea is to have 2 mobile LoRaCHESS ‘terminals’ that can play over the TTN network.

basically this > https://sites.ualberta.ca/~smartynk/arduino/chess.htm but without the wire :slight_smile:


#374

expected friday afternoon … i’m very curious , this must be a magic stick :smiley: sold out

* nope… no post nl :cry:


#375

interesting… looks like a LAIRD186 … they don’t talk about LoRaWAN


#376

the new midi spec can control drones … So can we use that to in a LoRaWAN setting ?

MIDI HD Features (preliminary and not set in stone)

MIDI Capability Enquiry - Improved device awareness - what are you?
Protocol negotiation
Profile configuration
Parameter exchange
Note attached parameters
More channels, controllers
Higher resolution for controllers
Bandwidth
Simplification of setting NRPN
Simplification Bank and program changes

#377


cheap rotary encoders… aargh

so true


#378

RAK’s ‘magic stick’ arrived

first impression :

pro - good quality build
cons - WTF … NO MOUNTING PLATE / MATERIAL :rage: (that explains the low price?)

left - 8 dBM RAK

right - 3 dBI A&C

so what’s the relation between dBM and dBI ? … when ordered I didn’t noticed


#379

No product and no answer… FB… direct mail, they just don’t reply… bye bye iPrototype
Don’t trust their webpage when they say ‘in stock’


(Jeff Uk) #380

Hi @BoRRoZ dbm is absolute RF power (referenced say to 0dm = 1mW) and is a power rating, dbi is a ratio and is a figure of merit = gain - typically expressed in a given direction and compared to omnidirectional transmission. The two often misused/confused. When spec’ing the ant should focus on the dbi value - e.g. +2.5dbi, +5dbi etc. unless you are nearing the operating limit of an antenna’s capability which in these kind of cases may well be a max power rating of say 10, 50 or 100W (note not mW) I would hope the RAK ant can handle more than 8dbM and this is likely their claim for gain?


#381

tnx… but can you convert 8 dbM to dbI ?
so as I understand it now 8 DBM means nothing in antenna gain terms and RAK tricked me