All Questions
Tagged with water underwater
6 questions
2
votes
2
answers
241
views
Modelling I2C capacitance for cables under water
My setup works fine with following combination of hardware:
Raspberry Pi4 connected to a TCA9548A I2C Multiplexer from Texas Instruments, whereas each channel is connected over 4wires (GND, VCC, SDA, ...
- 377
0
votes
2
answers
151
views
Turn off LED when submerged in water
I want to do a simple project where an LED turns off when it is submerged in water.
I thought this would be simple because when you short the two leads of an LED with wire, it just shorts the power ...
0
votes
1
answer
121
views
PCB surface finishing for underwater use
I need to find a very cheap way to detect water ad specific levels. No needs to have a linear measurement of its height.
I'm thinking about a simple FR4 PCB, with several couples of tracks. Each ...
- 1,450
3
votes
1
answer
416
views
Dipole Sleeve Antenna design in fresh water - Transmission frequency and emitted power?
Hello dear antenna enthusiast,
I would like to receive and emit EM signals with a dipole antenna in the range of **433.9 to 434.5 MHz in fresh water.
So I chose a half-wavelength dipole sleeve-...
- 55
0
votes
2
answers
132
views
Is it safe to build a floatable speaker?
I'm thinking of building a floatable speaker to float along beside me in a lake or a small river while tubing. I've got some speakers and the following 12V amp:
DROK Amplify Module Audio Component ...
- 1
1
vote
0
answers
122
views
Quadcopter plummeted into the ocean
We have a quad copter which had an arm partially detach mid-flight, which in turn destabilized the vehicle, plummeting it into the ocean. After two hours of searching we were finally able to recover ...
- 247