Understanding Schematic Design
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Multiple decoupling capacitors on the ESP32’s power pins serve to filter noise across a very wide frequency range. Each value has its own “sweet-spot” impedance vs. frequency curve, so by combining them you get low impedance from DC up into the hundreds of megahertz.
Table
| Capacitor Value | Purpose | Frequency Range Filtered |
|---|---|---|
| 10 µF (bulk) | Holds up the rail for large, slow transients (e.g. Wi-Fi bursts) | DC – a few MHz |
| 0.1 µF (mid-range) | Local energy reservoir for medium-speed switching | ~1 MHz – 50 MHz |
| 0.01 µF or less (high-freq) | Snubs very fast spikes and RF noise | 50 MHz – hundreds MHz |
By placing:
– a large bulk cap close to your regulator,
– a 100 nF right beside the ESP32 IC1, and
– a small high-frequency cap (e.g. 10 nF or lower) right at the power pin itself
– a large bulk cap close to your regulator,
– a 100 nF right beside the ESP32 IC1, and
– a small high-frequency cap (e.g. 10 nF or lower) right at the power pin itself
you ensure that switching currents and RF bursts from the ESP32 have a low-impedance path to ground at all relevant frequencies, preventing supply-rail dips, oscillation, and RF-induced glitches.
Find bulk capacitor
Find high-frequency cap
Layout guidelines from datasheet
Routing practice
261 days
Ready.
PP5V0
PG_PP5V0
C26
Capacitance
4.7µ F
VOS
C28
Capacitance
.1u F
PP12V0
C31
Capacitance
.1u F
VOS
C25
Capacitance
22u F
R7
Resistance
100k Ω
R8
Resistance
953k Ω
C29
Capacitance
10u F
U3
Manufacturer Part Number
TPS62130ARGTR
C27
Capacitance
10u F
R6
Resistance
180k Ω
C30
Capacitance
10u F
L3
Inductance
2.2u H
Reviews
![ESPRSSO32 Smart Scale AI Auto Layout [Example] thumbnail](https://img-cdn.flux.ai/eyJidWNrZXQiOiJncmF2aXRvbi1lbGVjdHJpYy1zeW1ib2xzIiwia2V5IjoiZG9jdW1lbnRfYXNzZXRzL0VTUFJFU1NPMzJfU21hcnRfU2NhbGVfM0RfVGh1bW5haWwtY2QxNTI2NjItNjdjMi00MTk4LWJmNjUtNDJiZDk5N2E0ODYyLnBuZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MTM2LCJoZWlnaHQiOjEzNiwiZml0IjoiY29udGFpbiIsImJhY2tncm91bmQiOnsiciI6MCwiZyI6MCwiYiI6MCwiYWxwaGEiOjB9fX0sIm91dHB1dEZvcm1hdCI6IndlYnAifQ==)
Learn how to use AI Auto Layout on this ESP32 Espresso Smart Scale! In one click you’ll see AI Auto Layout perform magic. Pay close attention to how we recommend creating rulesets, zones, and fanouts. By copying the setup in this example on your own project, you’ll have a fully routed board in no time!
Properties
Properties describe core aspects of the project.
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $0.41–$0.42 |
Digi-Key | $0.41 |
LCSC | $1.36 |
Mouser | $1.00 |
TME | $0.00 |
Verical | $0.02–$0.04 |
Assets
dxf
ESPRESSO32 Smart Scale Board Outline.dxf
ESPRESSO32 Smart Scale Board Outlinedxf
ESPRESSO32 Smart Scale Antenna Cutout.dxf
ESPRESSO32 Smart Scale Antenna Cutout
ESPRESSO32_Smart_Scale_3D_Thumnail.png
ESPRESSO32_Smart_Scale_3D_ThumnailThumbnailControls
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