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How to measure water heater temperature?

You don’t need to make fittings to measure in the water directly. Heat transfers and the temperature on the outside of the tank under the insulation will be the water temperature. You could use a ...
Bill P's user avatar
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3 votes
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Please help me identify this IC - top marking "CEK"?

Most probably it is a single 2-input AND gate, SN74LVC1G08DCK in SC70 packaging.
kaosad's user avatar
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Detection system for specific material

I think the answer may be a system similar to that used in electronic catflaps which reads the code from a chip implanted in the animal. The chip is small enough to be attached to a bee, and the ...
Ross Henderson's user avatar
1 vote

Connecting Two 24VDC Power Supplies

Having multiple supplies is possible, as long as you ensure common ground and avoid any cross-feed between the Supplies. Different question: Why not use a stronger supply to feed the whole circuit in ...
S_G's user avatar
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Connecting Two 24VDC Power Supplies

It is better for you to connect both GND and make one reference GND. So you can avoid any noise in data logging part.
Nima Azad's user avatar
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I need a sensor setup to detect if something passes through an opening after I click a button

To make your pill dispenser work smoothly, you'll need sensors and a setup that detects when pills pass through each slot. Here's how it could work: attach a sensor to each slot where pills come out. ...
Gonzalocasey's user avatar
1 vote

Modelling an eddy current sensor

Link to "modelling" ... With the new update ... If you solve the two equations now, you should have the results you are searching. Straightforward. t1 and t2 are what you are searching for, ...
Antonio51's user avatar
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3 votes
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Suggest appropriate substitute for cable glands

Add a cable sleeve to the cable and thus increase the outer diameter to maybe 4.5 mm or so. Plenty of options to choose from including heat-shrink sleeving. The sleeve only needs to be added where the ...
Andy aka's user avatar
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Opamp dual package IC configuration

There is no global "better" here. It's a tradeoff, like with most things in engineering. Option 1 is good when the first stage has very high gain, and feedback from high-amplitude output of ...
Kuba hasn't forgotten Monica's user avatar
11 votes
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Design of very long serial signal systems

Software In software (regardless of the hardware chosen), you basically want debounce code which ignores transients. There are endless algorithms, but perhaps one that is suitable is: sample at high ...
jonathanjo's user avatar
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2 votes

Opamp dual package IC configuration

This quite depends on what the sensor signals signify. In particular, whether "signal absent" is an important case to handle. When it is, crosstalk between the processing paths of the two ...
user107063's user avatar
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1 vote

Opamp dual package IC configuration

I don’t expect serious crosstalk levels, until gross mistakes in routing and bypassing are made. In-chip crosstalk usually is less than 60..80 dB (A haven't found such data for TLV2333, but there's a ...
Eugene K's user avatar
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3 votes

Opamp dual package IC configuration

Option 2 will have slightly less cross-talk between the two signal channels. For me, that makes it the starting point, especially with a channel gain of almost 70 dB, and there has to be a sound ...
AnalogKid's user avatar
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Ultrasound Receiver

A rectifier straightens the beam for a better reception. A peak detector determines the strength of the receiving signal. You will not get a picture of a blood vessel but you can determine its size in ...
Reinaldo Cruz's user avatar
1 vote

Temperature Sensor Auto

I assume, you want to use the LM3914 configured as shown in figure 1 of the datasheet. Then REF_OUT provides 5.0 V and this is the signal input range. This circuit uses the stable 5 V reference ...
Jens's user avatar
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1 vote
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Designing Eddy Current Sensor?

Having previously designed Eddy current sensors for UXO, you really didn't give enough information to narrow down what changes you need for a target sensor; however, ESTCP has more than enough ...
b degnan's user avatar
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Designing Eddy Current Sensor?

The general principle of eddy current sensing is to read the impedance of a coil (coupled to some workpiece) as a complex impedance, the real part of which corresponds to resistivity of the material, ...
Tim Williams's user avatar
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1 vote
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Which component is likely raising the temperature measurement on my BME680 sensor board?

R1, R2 and R7 appear to have some logic voltage across them and they are very low value so they would be my first suspicion. I don't see any reason offhand why they could not be 100kΩ or even 1MΩ. For ...
Spehro Pefhany's user avatar
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Which component is likely raising the temperature measurement on my BME680 sensor board?

your Schmitt trigger's power dissipation depend on the load they're driving, and that is not part of your schematic; so you can't know what they actually consume. Note that the current they sink into ...
Marcus Müller's user avatar

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