The WORKBENCH part 2


no not the same ( Static power consumption 6x higher, they use different ldo)


(S54mtb) #234

I like power walls when they are mobile…
New photo by Marko Pavlin


6x higher static power consumption due to ldo quiescent current?

LDO on mine is marked HT30. I measured 13.7 uA in rest, 15uA when active.
AS312 max VDD is 3.6V. If good 3.3V power supply is available the ldo could even be removed.


From AS312 datasheet

(Jeff Uk) #236

Thanks - I will take a look at them - though 3-5m range is a bit short as Rob suggests…mind if ceiling mounted looking down of inclined with 100deg cone then ok for poss occupancy sensor esp if placed with view of entry/exit points (doors). :slight_smile:


Im not in the ‘mood’ now, but I did a lot of PIR testing 2 years back… have more then 10 different types here
will test again that one you say is 13.7 uA @3v3:sunglasses: (no way!)



keep us informed ! :rofl:


dutch police don’t like E-bike inventors and sized this bike


Your tests from 2 years ago make impossible that a test with my PIR modules now show readings of 13.7uA in rest and 14.8uA active?

Like you said, their range is quite limited. I did some simple tests and did not get more than 3m to 5m range.


lol… that’s why you can’t say ’ You can try this one (similar module and 3+ times cheaper)

I didn’t realise yesterday it was after midnight So I didn’t setup a test with the pir, but your right, they could have changed the components/design So the outcome of a test with 'my PIR’s would be always open to discussion.

I found only 2 PIR’s working reliable with a power consumption under the 15 uA @3v3 and those where not the cheapest.

conclusion : not all PIR’s are equal :metal: (especially outdoor use)


(Kylix) #242

You should try one of these:


yes I know them… about 20 E if I remember 1 uA

(Kylix) #244

I bought on eBay for $4/piece, an old version: EKMA1101111. I have no idea if the item is still available…


Fyi, Welectron (Germany) shows they have uCurrent Gold on stock:


no import tax to NL and DHL shipping 3.95 € … not bad :sunglasses:

(Amedee) #247


SMD always frightened me a bit, and I tried to avoid it so far, but I eventually decided to bite the bullet with this Mini-Lora from @Charles

It ended up quite OK, I am quite happy with the result.

(Still waiting the Arduino Pro for testing)


with that soldering iron from the picture ? … cool :sunglasses:

a nice project with these sensors LoRA BME280 Environmental Node (with webbased backend)

(Amedee) #249

150W was maybe a bit too much for SMD :roll_eyes: my WD-1 was more appropriate for the job :grin:

I don’t have plans yet for these nodes, I was mainly looking at low power sleep and these are really affordable…


If it’s your first SMD soldering, congratulations, very well done :wink:

(Amedee) #251

I have no idea of what to do with that, but it is quite cool…


what about a lorawan channel activity + rssi indication MQTT node red wifi mobile christmas client ?

wifi demo - still not available in Dutch language :cry:

audio test set up as shown :
*changed from RPI zero to RPI3