Lucas
  • Member for 5 years, 7 months
  • Last seen more than 2 years ago
5 answers
11 votes
3k views
What is purpose of an Undervoltage Sensing Circuit?
Accepted answer
18 votes

I guess you are trying to understand why you need an IC to do what a simple transistor could do "in the old days", which is pulling a reset pin low (or high), right? If that's the case, a couple of ...

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1 answers
0 votes
991 views
Waking ESP8266 from Deep Sleep Using a Motion Detector
Accepted answer
2 votes

You can simply use an N-MOSFET like suggested in the comment. Connect the MOSFET drain to the wake-up pin of the MCU and the source to the ground. Finally connect the gate of the MOSFET to the motion ...

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3 answers
1 votes
340 views
Spikes on LT1301 DC-DC converter
2 votes

Like Dave Tweed mentioned, these spikes are likely very low energy. Zoom into them (in the time scale) and check the duration. If they are in the order of a few nanoseconds, you can easily solve it ...

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1 answers
0 votes
215 views
Relay's maximum rating current and voltage
Accepted answer
1 votes

Unfortunately, no. You can't exceed any of the ratings, even if the other one is far from the limit. These ratings exist for different reasons and the device will fail in different ways, but it will ...

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1 answers
-1 votes
258 views
whats up with this op-amp circuit?
Accepted answer
1 votes

Julian, regarding the fact that the mic amplifies well when you are very close to it, but it the volume drops a lot as you move a little away from it could be due to the type of mic you are using. I'm ...

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2 answers
0 votes
396 views
L-Network impedance matching
Accepted answer
1 votes

These 2 circuits are equivalent indeed, given the condition that the frequency is fixed. This is implied by the fact that you have a fixed impedance for the capacitor. The impedance will change with ...

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1 answers
2 votes
2k views
Import MCP602 Model into LTspice - Timestep Error
1 votes

Your circuit would just work as a square wave output if you tried to prototype it, as you are connecting the inverting input to GND and driving the non-inverting input with a couple of volts. In this ...

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1 answers
0 votes
538 views
How to make a circuit that will turn on a light for only a few seconds when closed
1 votes

The circuit you posted won't work, unfortunately. There are a few problems with it, but one that is critical is the fact that you have the cathode of your LED connected to the GND (-) terminal of your ...

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1 answers
0 votes
579 views
input offset voltage of an op amp
1 votes

If your signal is 0 V to 0.5 mV, the input offset could be 4 times your signal (2 mV/0.5 mV). In practice, the problem is that if you want to have a high gain to amplify your signal (e.g. 500x), then ...

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2 answers
0 votes
157 views
What is the best way to go about high-quality wireless communication between two microcontrollers?
1 votes

There are really a lot of ways to accomplish what you want to do, but I understand that what you are looking for is guidance on how to structure your search to get things done. As you have an idea of ...

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2 answers
1 votes
5k views
Stripping USB Cable - What to do with shielding?
1 votes

To be as short and straight to the point as possible, number 3 is the easiest way to go. Given that you mentioned you won't b e using the data wires (green and white in your photo) and that the device ...

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2 answers
1 votes
349 views
Wiring an RGB led light array
0 votes

Ideally, you should have a current source for each color so you can control their intensity separately. Be aware that a 6 A (6000 mA) current source is not that easy to build and, more importantly, ...

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