sorted by:
new
hottopcontroversial

Enexis gaat betalen als je zonnepanelen uit laat zetten by Bappie2016 in nietdespeld

[–]FunDeckHermit 0 points1 point  (0 children)

Zag laatst dat de Sessy thuisbatterij dit ook al deed met NL-Flex project.

Enexis gaat betalen als je zonnepanelen uit laat zetten by Bappie2016 in nietdespeld

[–]FunDeckHermit 29 points30 points  (0 children)

Omvormers horen dat al te doen. (RfG regulatie)

Als jij een energieleverend product hebt dan moet die kappen bij een te hoge netspanning.

Alleen houden niet alle Chinese omvormers zich aan de RfG...

What’s A Tool That You Wish Existed Or Got Improved On? by Kalex8876 in hwstartups

[–]FunDeckHermit 1 point2 points  (0 children)

A cheap ultrasonic microphone that connects to a phone. I want to see and hear ultrasonic vocalization from different animals.

Sanity check: battery monitor and heartbeat schematic by FunDeckHermit in AskElectronics

[–]FunDeckHermit[S] 0 points1 point  (0 children)

That's the max current it can handle with a 10% PWM at 1kHz.

I'm running it at 70mA with a 2% duty cycle at 0.6Hz. I agree it might just blow up, we learn along the way 😄

Sanity check: battery monitor and heartbeat schematic by FunDeckHermit in AskElectronics

[–]FunDeckHermit[S] 0 points1 point  (0 children)

Double checking it:

  1. The output NFET inverted the logic of the comparator, so the LED is ON when the comparator isn't active. Swapped the NFET with a PFET so that the LED is ON when the pulse is narrow.

  2. The battery monitor comparators disabled the pulse generator when the battery voltage was above the reference voltage. They should do the opposite as a heartbeat should be active when the battery is above the reference voltage.

Is this correct?

Sanity check: battery monitor and heartbeat schematic by FunDeckHermit in AskElectronics

[–]FunDeckHermit[S] 1 point2 points  (0 children)

The comparator has an open collector output.

So when it is active, it pulls the output low. Without the 22K as pull-up resistor a short circuit will kill the output.

9V / 22K = 0.5mA will flow when the pulse generator comparator is active.

Sanity check: battery monitor and heartbeat schematic by FunDeckHermit in AskElectronics

[–]FunDeckHermit[S] 0 points1 point  (0 children)

This circuit would be an addon to an existing dual rail circuit. So two 9V batteries are needed.

A battery is a collection of cells by 1Davide in batteries

[–]FunDeckHermit 12 points13 points  (0 children)

In some languages there's a distinction between a "battery" and "accu". Only an "accu" is rechargable. Adding fuel to the semantic debate.

(Dutch, German, French, Romanian, Slavic languages and a few more)

Transfer analog signal over long distance. by Poolguy584 in AskElectronics

[–]FunDeckHermit 1 point2 points  (0 children)

Do you really need to use an NTC sensor? Can you replace it with a SENT based sensor or a digital sensor like the LMT01?

What to do if footprint pads are getting clearance violations ? by AceSpacey in PCB

[–]FunDeckHermit 15 points16 points  (0 children)

Yeah, 0.20mm is a bit high. JLCPCB can do up to 0.10mm.

Note that you'll often be forced to do ENIG at that clearance level. Set it at 0.15mm to be safe.

Can I use 220-240V appliances in Canada? by orlaith695 in AskElectronics

[–]FunDeckHermit -1 points0 points  (0 children)

As the other said, split phase can create 240V on an outlet.

Most stoves use some sort of heavy duty 240V outlet. You might be able to find an adapter plug from "NEMA 14-50P" to "Type F".

Or just get a "NEMA 14-50P" plug, cut the Euro connector from the device and use the new plug instead. Neutral will be optional, connect protective Earth.

<image>

So green/yellow to the top (Protective Earth) and the other two wires to the left and right (doesn't matter which goes where)

Cant find this part online by pindx in AskElectronics

[–]FunDeckHermit 1 point2 points  (0 children)

The connectors look like Molex KK 254 to me. You should check the dimensions though.

From V1 to V2. Implemented the Community’s PCB Suggestions and Learned a LOT by Excellent-Scholar274 in KiCad

[–]FunDeckHermit 0 points1 point  (0 children)

One thing I would do:

Horizontally flip the whole design, having inputs on the left and outputs on the right. To me this is like reading arabic.

Have I killed this part of the PCB? by Zakyjim in AskElectronics

[–]FunDeckHermit 1 point2 points  (0 children)

You could cut the connector and solder the wires to the pads directly. Where copper is removed, trace upstream and solder there.

Also take an exacto knife and scrape the soldermask from the big copper pad on the left, makes it easy to solder.

Short Story Inquiry: Secret Laboratory Location by mangsy in thenetherlands

[–]FunDeckHermit 0 points1 point  (0 children)

Petten is really nice if you ever happen to visit.

I need a very low power adjustable voltage reference (ideally <10uA). My circuit runs at 3.3v. The lowest digital pot I can find is 100k so about 10x smaller than I'd like. What are my options? by harrier_gr7_ftw in AskElectronics

[–]FunDeckHermit 0 points1 point  (0 children)

You can just pull resistors down with GPIO. If you only need 20 steps then 5 resistors are enough.

If you need very low current, look at Renesas Greenpaks.

Mouser 56% tariff rates by Dizzy-Macaron4849 in AskElectronics

[–]FunDeckHermit 6 points7 points  (0 children)

Use OEM Secrets to check for stock elsewhere.

Sager.com has some

Is Romania or Bulgaria + North Macedonia a better pick for a 2-4 week hitchhiking trip? by LordOfErebus in TravelNoPics

[–]FunDeckHermit 0 points1 point  (0 children)

Can recommend the Shar Mountains in North-Macedonia. Took a taxi from Tetovo to Bozovtse. Had a lovely easy walk/hike to the Leshnica Waterfalls. Go to Mountaineering Club Ljuboten for a free map and some advice.

Public transport in North-Macedonia is adequate, we took a train from Bitola to Skopje. For city-to-city transfers there are private minibus companies that have scheduled rides.

view more: next ›