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## Minimal distance between silkscreen text and edge?

I’m maybe going to use JLCPCB to order a PCB (if I get it finished), but I’m wondering about the minimal distance between the edge and silk screen text. If I look at the capabilities: https://jlcpcb.com/capabilities/Capabilities I find regarding silk screen text: Minimal height (32 mils) Minimal ‘line’ width (6 mils) The only item that […]

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## symbol of a potentiometer with a buoy to work as a level sensor

I am designing a circuit and I am going to use a potentiometer with a buoy to work as a level sensor. What symbol do I have to put?

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## Application of set_clock_latency

I am learning about VLSI static timing analysis (STA) and some applications of SDC commands. I’m probably still missing some big picture concepts, but my question is about “why” when it comes to using set_clock_latency. I see from the command there is an option to specify the latency from -source (the originating point of the […]

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## Delay relay triggered by switch turning off

I’ve got a dilemma. I’m trying to set up a delay relay for a boat shower waste pump. The waste pump is triggered by some microswitches when water flows to the shower. I want the pump to continue to run once the switch has been disengaged (shower turned off). At the moment, my relay setup […]

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## First-Order Circuit that Looks like a Second-Order Circuit

The image attached is a first-order circuit because the two branches of the circuit are uncoupled, but I’m struggling to show that mathematically. From the diagram, we can immediately write two equations from KVL (each loop containing the independent source) that are first order ODEs in the two different capacitors. But I can’t think of […]

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## STM32F4 I/O Max Voltage Input

I’m having trouble understanding the max voltage input voltage range for an I/O pin on a stm32F11 when powering it with 3.3V.I’m want my STM32 to communicate with a 3.3V input signal and need to know if the GPIO and rx/tx UART lines are 3.3V tolerant. Looking over the absolute max specs in the data […]

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## STM32F4 I/O Max Voltage Input

I’m having trouble understanding the max voltage input voltage range for an I/O pin on a stm32F11 when powering it with 3.3V.I’m want my STM32 to communicate with a 3.3V input signal and need to know if the GPIO and rx/tx UART lines are 3.3V tolerant. Looking over the absolute max specs in the data […]

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## STM32F4 I/O Max Voltage Input

I’m having trouble understanding the max voltage input voltage range for an I/O pin on a stm32F11 when powering it with 3.3V.I’m want my STM32 to communicate with a 3.3V input signal and need to know if the GPIO and rx/tx UART lines are 3.3V tolerant. Looking over the absolute max specs in the data […]

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## Is the iron loss of an iron core transformer twice the mass of the iron core?

In a mathematical problem related to transformer loss I’ve found Iron loss = Mass of iron x 2. If this is true, then how kg is converted into watts.

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## Convert car stereo setup to run from mains supply

I have a car stereo system that I wish to keep once my car is no longer running. I have thought about if I could convert it so that I can power it by a wall plug. I have three things to be powered; the head unit which has a 10amp fuse, a 4channel amp […]