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give me approch for making protection circuit for our board
@copilot give me approch for making protection circuit for our board
2y
Sure, I can give you a general approach for designing a protection circuit for your PCB. First, it's important to determine what types of protection your circuit might require. This typically depends on how the board will be used and what kind of electrical stresses it could be exposed to. Here are the most common types of protection used in electronic boards:
- Overvoltage protection (e.g., using zener diodes, transient voltage suppression diodes, or voltage clamping ICs)
- Overcurrent protection (e.g., using fuses or polyfuse resettable fuses, or current-limiting ICs)
- Electrostatic Discharge (ESD) protection (e.g., using ESD suppression diodes)
- Reverse polarity protection (e.g., with diodes or MOSFET for low power loss)
- Overtemperature protection (e.g., using thermistor sensors or thermal shutdown ICs)
Here's an overall approach to incorporate these protective measures into your circuit design:
- Determine the types of protection needed: This is based on the environment where the PCB will be used.
- Choose appropriate components: Depending on the type of protection you need, there could be several different components to choose from.
- Place components appropriately in your schematic: In general, protection components should be placed at the points where potential damage could occur. This is typically at input/output pins or other exposed connections.
- Build and Test the Circuit: Prototyping and testing are essential parts of any design process. Testing could involve applying over voltages, reversing power supply polarity, or simulating ESD events to verify the circuit can withstand these.
Remember to consider not just the protection goals but also the trade-offs involved, such as cost, board space, and impact on performance. I'm here to help you design the specifics once we determine what types of protection circuits you need.
2y
2
how can make 3.3 buck converter
how can make 3.3 buck converter
2y
7
my circuit is ockay or not
@copilot my circuit is ockay or not
2y
Based on the description of your project, it's hard to definitively say if your circuit is okay or not because there are many factors involved, such as the intended functionality, the specific components used and their specs, signal types, external inputs/outputs, and power requirements, among other things.
However, based on the available information, I can make a few observations:
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Resistor R1 is connected between a power net (PowerNet1) and a net with diode D1 and transistor Q1.
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Diode D1 (specifically a zener diode based on its part number) is also in this network, seemingly providing some kind of voltage regulation, assuming PowerNet1 is a voltage source.
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Transistor Q1 appears to be in a common emitter configuration with base signal coming from the same net where R1 and D1 are present, but its collector (Q1:C) and emitter(Q1:E) nets seem to be unconnected to the rest of the circuit. This configuration might not give the expected results.
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Resistor R2's pin (R2:P1) seems not connected to any other component or power net. Its other pin is also not listed, making it non-functional in this current circuit configuration.
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There is no path for current to return to the power source. A common ground or a complete loop is necessary for a functioning circuit, but does not appear to be present in your current configuration.
To help further, I would need to know the intention of your design or the functionality you're striving to achieve. Based on that, I or others could advise on necessary modifications or corrections to your schematic for it to work as expected.
2y
5
i want to make protection circuit for my controller board how can make it
@copilot i want to make protection circuit for my controller board how can make it
2y
There are several strategies you can apply to protect your controller board. Protection circuits can include but are not limited to overvoltage protection, overcurrent protection, reversed polarity protection, and electrostatic discharge protection.
Let's make a basic protection circuit for common situations. Assuming you're using a DC supply for your controller, and the controller has a supply voltage range between 5V to 12V and maximum current rating of 1A.
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Overvoltage and Under-voltage Protection: To protect against overvoltage, you can use a Zener diode which will break down at a certain voltage and shunt excess voltage to ground. For under-voltage, you could use a voltage supervisor IC like the TI's TPS3839 that gives a clear signal when the voltage gets too low.
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Overcurrent Protection: You can use a resettable polyfuse. A polyfuse increases its resistance significantly (effecting in essence a 'disconnect') when the current exceeds a certain value and turns back to a low resistance state after the high current event finishes. Select a polyfuse with a hold current above your circuit's expected maximum current.
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Reverse Polarity Protection: This can be achieved by using a series Schottky diode at the input which will block any current flowing in reverse direction. However, the diode will introduce some voltage drop (normally around 0.2V to 0.3V).
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Electrostatic Discharge (ESD) Protection: This is more important if your circuit interfaces with the outside world. Human contact can introduce high voltage static charges that can damage the components. You can use devices such as ESD suppressors, which are designed to shunt a static discharge away from sensitive components.
Remember to arrange these protective components at the input power section in the correct order for them to work properly. You should also ensure each protection feature does not interfere with the others.
Such protection circuit can be appropriate for most of simple controller boards. Please review your board's datasheet and requirements thoroughly while designing the protection circuit for any specific needs.
2y
1
U1
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- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #genericsjharwinbarrozo15.1k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
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Grand Blush Antigravity Battle Room
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Availability & Pricing
| Distributor | Qty 1 | |
|---|---|---|
| Digi-Key | $29.00 | |
| LCSC | $77.94 | |
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