New answers tagged logic-level
2
votes
Can I use GPIO logic level converters as tiny low-current solid state relays?
No, you can't use these level shifters to drive a 180mA pump even if you manage them to put in right configuration. The shifters, per descriptions, use BSS138 N-FETs. The FETs have 6 Ohm Rds_on even ...
1
vote
Accepted
Can I use GPIO logic level converters as tiny low-current solid state relays?
No, a bidirectional logic level converter has no current gain, so it won't serve your purpose. However, you could use a Darlington transistor array, such as the ULN200x series.
0
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Ground detection circuit
I see two simple options. The first one uses a XOR gate to invert the button signal depending on the header status like this:
simulate this circuit – Schematic created using CircuitLab
The ...
1
vote
Accepted
Ground detection circuit
On my GPIO I want to be able to know whether the header is grounded and if the button is being pressed.
For those two variables there are four possible combinations. In a snapshot of the GPIO input, ...
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Ground detection circuit
@Transistor Exactly, when booting up, I can guarantee that the button is not pressed so I will determine the state of my header (I'm assuming as well that the state of the header will not change).
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4
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Accepted
Making a circuit switch using MOSFETs
In the lower circuit, both transistors have their drains connected to the supplies. That's called "common drain" or "source follower". The upper circuits have the sources connected ...
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