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U1
any ic that does the conversion form 3.3V signal to 1.8V
2y
A common device often used to convert logic level signals from one voltage level to another is a level shifter or a logic level translator. One such example of a bidirectional level shifter that can convert signals from 3.3V to 1.8V is the TXS0102 from Texas Instruments.
This IC has two bidirectional channels that are capable of shifting logic levels both ways, i.e., from 3.3V signals to 1.8V signals and vice versa, making it versatile for different applications. This level shifter is specified for voltage translation over a wide voltage range (from $1.2 \mathrm{~V} $ to $3.6 \mathrm{~V} $) which should cover your scenario.
Please make sure to review the datasheet of the product and ensure its compatibility with your device's specifications. The availability might also depend on the specific package type you need and the stocking levels from your supplier.
Nonetheless, always double-check to ensure the requirements of your specific application are met.
2y
ALSO how to convert 3.3v power supply to 1.8v
2y
To convert a 3.3V power supply to 1.8V, you would typically use a voltage regulator. One common choice for this type of application is a Low-Dropout regulator (LDO).
A widely used LDO for this purpose is the LD1117. It is an adjustable voltage regulator capable of outputting voltages from 1.2V up to 15V. However, you would need to set it up properly using two resistors to generate the precise 1.8V output.
Here's a simplistic way to connect the LD1117:
-
Connect the VIN pin of the LD1117 to the 3.3V power supply.
-
Connect the GND pin of the LD1117 to the ground of your power supply.
-
Set the VOUT pin to 1.8V by using a voltage divider network of two resistors. You need to select the resistor values based on this equation:
VOUT=VREF×(1+R1R2)+IADJ×R2
Where:
- $V_{OUT} $ is the desired output voltage (1.8V).
- $V_{REF} $ is the internal reference voltage (1.25V for LD1117).
- $R_1$ and $R_2$ are the resistors in your voltage divider network.
- $I_{ADJ} $ is the LD1117's adjustment pin current (typically around 50μA and can be neglected in most calculations).
Please note that in a real-world scenario, the power supply circuit would include additional capacitors for filtering noise and to stabilize the output voltage. The datasheet of the LD1117 provides more detailed information including typical application circuitry.
Also, always make sure to test the circuit in a safe environment before proceeding to ensure that it will not damage your target devices due to incorrect voltage.
Remember that the power dissipation on the voltage regulator needs to be properly addressed. In your case, the LDO will dissipate about $(3.3V-1.8V)\times I_{LOAD} $ in heat, where $I_{LOAD} $ is the current consumed by your 1.8V load. If this value is too high, you'll need to add a heatsink to the LDO in order to prevent overheating.
Lastly, check that the output current and power dissipation capability of the LDO is suitable for your application. If your circuit requires a large amount of current, a switching regulator (also known as a DC-DC converter), such as LM2596, may be a more efficient choice even though its implementation is somewhat more complicated due to an inductor and extra capacitors.
As always, be sure to consult the specific components' datasheets for full information on how to use them in your design.
Source(s):
2y
mosfet that has can be activated with 1.8v
2y
A commonly used MOSFET that can be controlled with a relatively low gate-source voltage (Vgs) such as 1.8V is the BSS138. This N-channel enhancement mode Field Effect Transistor is designed for analog switch applications and it offers a Vgs(th) (threshold voltage) as low as 1.3V max, which means it can start to conduct current with as little as 1.3V applied between the gate and source terminals.
Here's a simple way you can use BSS138 as a switch:
- Connect the 'Drain' pin to the device that you want to turn on or off with the MOSFET.
- Connect the 'Source' pin to the ground reference of your system.
- Control the 'Gate' pin with a 1.8V signal. As per datasheet, applying 1.8V to 'Gate' will make the MOSFET conductive and thus 'Drain' will get connected to 'Source', allowing current to flow to your device.
You can check the datasheet for exact details of this component. And remember to always ensure that the voltage and current ratings of the MOSFET match (or preferably exceed) the requirements of your application for safe and reliable operation.
Ensure that the BSS138 MOSFET can handle the power dissipation which can be calculated from:
PD=ID2∗RDS(on)
Here, $ P_D $ is the power dissipation, $ I_D $ is the drain current, and $ R_{DS(on)} $ is the on-state resistance of the MOSFET. If the resulting power crosses the thermal limit of the package, might be necessary to attach a heat sink.
2y
which pins of esp32 -s3 can be used for i2c
2y
The ESP32-S3 chip, as implied in your ESP32-S3-WROOM-1U-N16R8 module, supports I2C communication.
The I2C interface requires two lines: SDA (data) and SCL (clock). By default, on ESP32, the I2C lines are typically on GPIO21 for SDA and GPIO22 for SCL, but since the ESP32 is highly flexible it allows the use of arbitrary pins for I2C communication.
From the ESP32-S3-WROOM-1U-N16R8 pinout, it seems that these default pins (GPIO21 and GPIO22) are not exposed. Therefore, you would need to map other available pins for this purpose. For example, you can use the following pins:
- IO18 for SCL
- IO19 for SDA
or alternative options could be:
- IO13 for SCL
- IO14 for SDA
Please bear in mind that you must update these definitions in your firmware code accordingly. For example, in Arduino IDE, you would use the
Wire.begin(SDA, SCL); function to set arbitrary pins for I2C communication, where SDA and SCL are the numbers of the pins you plan to use.It's worth noting as well that you need to ensure these I2C pins are not being used by other peripherals in your application to avoid conflicts.
2y
2
U2
Not Recommended for New Designs
Reviews
- 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 ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #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, 10000uF 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, 220pF, 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 suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibraryjharwinbarrozo15.8k
- 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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