Questions tagged [electrode]

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165 views

How many / which electrodes should I use as input for an RLD (right leg drive)?

When reading through the datasheet of the ADS1298 (an analog Front-End for Biopotential Measurements) I noticed the schematic on page 42 (see below): It is possible to select or deselect the positive ...
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1answer
53 views
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164 views

Consistently assigning electrode nodes in random resistor networks

In the context of random resistor networks, the general question of interest is often "what is the effective resistance between two arbitrarily chosen nodes?" But more specifically about the nodes we ...
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2answers
173 views

Which electrode is anode and which cathode in a plasma reactor with high-voltage DC power supply?

Which electrode is anode and which cathode in a set-up like this (plasma reactor)? Or, what is high-voltage sharp electrode - anode or cathode?
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48 views

Voltage and amperage requirements for resistance heating of glass

I am planning to introduce electric heating/boosting in my glass melting furnace. The present temperature of the glass is around 1200 deg C and I need to raise it up to 1300 deg C. I am trying to get ...
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2answers
112 views

Are electrodes mostly homogeneous or are there variations by usage, such as EEG vs EKG/ECG?

Are electrodes mostly homogeneous or are there variations by usage? My main usage is EEG. I have some interests in other areas and see similar electrodes sold for less money when marketed for ...
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2answers
163 views

What is the function of the dippers in a slip ring liquid starter?

The liquid starter is one that uses a washing soda solution and water in a tank. From what I've read, the dippers are attached to a shaft controlled by a small motor to lower the dippers into the ...
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0answers
366 views

Where exactly in the environment does the 60Hz power line noise be picked up from?

I am measuring EMG signals using ADS1299, and I have problems removing/eliminating the 60Hz noise in my measurements. I measured the EMG signal in differential mode, and I also incorporated a driven ...
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1answer
76 views

Ion-selective electrode: high input impedance to measure the voltage

I read that an ion-selective electrode has an high impedance (\$100 \, M\Omega\$) and that it's necessary a high input impedance to measure the electrode voltage. I'd like to understand the above ...
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2answers
149 views

Does anyone have advice on homemade EKG/ECG leads?

I'm not sure this is where it should be posted, so apologies in advance, but I'm working with an Arduino and Sparkfun's heart rate monitor AD8232 (https://www.sparkfun.com/products/12650) to gather ...
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0answers
32 views

Isolation of circuitry from heat source

I'm building an electrolysis unit which will comprise a refractory crucible, containing the electrolyte and the electrodes. The heat will be generated from a furnace to aid the desired reaction. A ...
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1answer
102 views

Strange trend for ECG gold electrodes impedance at DC

I’m trying to characterize two electrodes for ECG which are made as a classic PCB with a rounded shape and with the copper covered by a thin layer of gold (ENIG process). My first attempt was to put ...
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1answer
28 views

Connectors on pH electrodes

I would like to know why pH electrodes are always with BNC type connectors (or DIN, S7, etc.), but never with "simple" wires. Can we put a BNC adapter to 2 wires and read the tensions with a ...
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1answer
94 views

Memories' structure

One of the most recent memory architectures is the 3D-Xpoint which has a structure of the type: So, you see that as usual in a memory device we have wordlines and bitlines. Now suposse I want to ...
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2answers
1k views

What is meant by the term “galvanic contact” in this sentence?

Simply speaking, a switch or circuit breaker are two metallic contacts (electrodes) that are in GALVANIC CONTACT with each other when closed and separated by a certain distance when open. I don’t ...
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1answer
58 views

What is the relationship between the current produced fuel cell, the electrodes and the voltage of a fuel cell?

I read somewhere that the bigger the surface area for the redox reductions to take place, and ultimately, the more redox reactions that take place, the more electrons that flow through an external ...
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41 views

Understanding what Electrode Impedance values mean on Spec sheet

I want to understand what the electrode impedance values given on spec sheet mean. Just looking to gain a general understanding and what voltages/ currents I can or cannot use. The electrodes are used ...
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0answers
57 views

Measurement of station grounding resistance and test electrodes

This is a pure electrical engineering question. I have seen a request for embedding test electrodes and connect them by "disconnectable" joints to a few earthing bars inside a station building, in ...
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1answer
168 views

Do certain types of electrodes work better than others in an area with hair?

In selecting components for an EEG development kit, I'm wondering if certain types of electrodes capture signals better in the presence of (a small amount of) head hair? For instance options include: ...