8
votes
How can I make a more permanent connection to cheap sensors?
Looks like they're 2.54mm pitch and flat, so you could use a SIP or DIP socket such as an 8-pin socket like you'd use for an 8-pin DIP IC. Not the machined type, which probably won't fit well, the ...
- 385k
7
votes
What is the purpose of different units in pressure sensors?
If a manufacturer is providing options, you must assume there's a market for those options.
It's 'just' a multiplication to you. It's the 'wrong number' for some technician who's got to repair an ...
- 162k
6
votes
How can I make a more permanent connection to cheap sensors?
If the supplied leads are too short, you could solder extra wire to them, heat shrink the splices, and then use the longer lead length to connect to any type of connector you like.
- 16.4k
6
votes
How can I cover my pressure transmitter sensors with a material that will protect it from being dirty and at the same time not interfere with signal
This is a tiny bit simplifying, but any nonconductive material you're likely to meet is going to not absorb RF energy. So, ABS, PET, Teflon, dry wood, acrylic, polyurethane foam, fiberglass/polymer ...
- 90.9k
5
votes
Accepted
Why does the air gap between the electrode and the overlay of a capacitive sensor have a negative impact on the touch performance?
The problem is that air gaps not only influence the base capacitance, they also influence the capacitance of the touch sensor when someone actually touches it.
The air gap essentially acts like ...
- 15.6k
3
votes
Accepted
Derive values from a graph
The graph only shows typical values. You cannot depend on those values being accurate for any given sample of the chip. If you read the datasheet you linked, you will find this line:
So for a 4.5V to ...
- 385k
3
votes
Making a device that can detect the salinity of water
Here is a good place to start: get two glasses of water, one with salt dissolved and one with no salt. Get a multimeter and place the probes in the water about a centimeter apart and measure the ...
- 1,105
3
votes
Accepted
PIR sensor circuit
As in the comments the 741 op-amp is not one of the better choices.
Consider using one of the test circuit configurations in the IRA-S210ST01 datasheet, these also use an op-amp similar to that ...
- 9,169
2
votes
How can I make a more permanent connection to cheap sensors?
My brief googling of the subject suggests you want to look into Clincher(tm) flex connectors from Amphenol.
- 22.6k
2
votes
How to splice a wire to this tiny pin on vibration sensor switch?
A manufacturer just shows them soldered into a PCB along with a lot of tortured English. The thicker pin provides the support. In both cases, but particularly in the lay-down orientation you might ...
- 385k
2
votes
Arduino 0-10V input
An Arduino is a hobbyist module. It is not an industrial product.
If you surround it with the required 'stuff' to bring it to actual industrial standards (say, to be as hardened and reliable as an AB ...
- 385k
2
votes
Making a device that can detect the salinity of water
Most people trying to solve this kind of design immediately think about the conductivity of salt water vs unsalted water. Especially as this is Electronics focussed.
But you might also consider the ...
- 13.2k
1
vote
Derive values from a graph
The parameter you are looking for is the Common-Mode output voltage. This is given in the datasheet you linked to:
For a 4.5V to 5.5V supply, it is nominally 2.55V, however can be anywhere from 2.4V ...
- 64.8k
1
vote
How can I write sensor data to an SD card without getting gaps in data?
You'll need to multitask reading the sensor and writing to the card.
When you have a data producer and a data consumer running concurrently the usual way is to connect them through a FIFO. A simple ...
- 72.2k
1
vote
How can I make a more permanent connection to cheap sensors?
It would be helpful in responding to have the actual part number of the subject sensor. The details of the device are important, like the conductor size, spacing, heat sensitivity, etc. Viable options ...
- 11
1
vote
BLDC Hall Sensor Angle Offset
Looking at your oscilloscope waveforms, it looks to me the Hall sensors are not placed at equal intervals in your motor.
The reason you don't see that effect at lower RPM is that the timer count ...
- 11
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