Questions tagged [switching]
Switching can be defined as the change in state whether it be an analog, digital, or mechanical device. For digital devices, switching can be defined as a transition from HIGH to LOW or vice versa. For analog devices, switching can be defined as a change of operation within a transistor. Mechanical device examples include physical light switches or button switches. Ultimately, switching interrupts current from going into another conductor path.
1,149 questions
1 vote
1 answer
88 views
What is the best way to stack another switch?
I have a soft PCB with a tiny switch on top of which I want to add another switch (a mosfet). What would be a good practice to do so? Just solder threads (hypothetical, in blue in the picture) ...
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7 votes
3 answers
907 views
Why are p-type MOSFETs used for high-side switching while n-type are used for low side? TO-220 package seems backwards
Disclaimer: Sorry for my ignorance - I'm a computer scientist but not an electrical engineer. It seems at first glance that this designation should be the other way around. N-type MOSFETs have the ...
1 vote
1 answer
141 views
Voltage Spikes with PWM Controlled Brushed Motor
I have disassembled a 20V cordless drill. It uses a two-lead brushed motor controlled via a PWM signal. Out of curiosity I connected both motor leads to an oscilloscope and measured both against a ...
0 votes
0 answers
44 views
BQ25620 VSYS layout
I'm designing a board with BQ25620 and I'm trying to layout the output VSYS loop. On the BQ25620EVM User's Guide (Page 11) I ...
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1 vote
1 answer
125 views
Safe Pi on/off with rocker and load switch
I'm working on a telemetry module and have doubts about the switching. I want to turn the module on/off using a rocker switch. To avoid a hard cut, I included a load switch. Intended behavior: When ...
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0 votes
1 answer
116 views
Buck-boost converter with 1 storing element is weird
I am looking to build a buck-boost voltage converter. I came up with this schematic: simulate this circuit – Schematic created using CircuitLab Assuming that $$\frac{1}{f_{sw}}<<C1\cdot R2 ...
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1 vote
1 answer
152 views
If you have an LED light tower, with 2 lights (green/red), that have a common ground, do you require power relays to control both?
I have a simple LED indicator tower with 2 colors, at 12 V DC. They are green and red. The brown wire is a buzzer. They all have a common ground: I was trying to wire it up to an Arduino (2 separate ...
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3 votes
1 answer
174 views
16 way high side switch - do I need 20 mosfet pairs?
Is there a way to implement this 16 way high side switch with less mosfets but still only use 8 GPIOs? The switched rail is 5V and the GPIOs are 3.3V. Total current draw will be <500mA and only one ...
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