Buck Converter Design for Ultrasonic Atomizer

flux

Got it. Your board is currently 50.5 mm × 60.5 mm. To place the four corner mounting holes at a 3/8 in (9.525 mm) offset from each board edge, set their centers to the following coordinates:
Mounting hole targets (3/8 in offset from edges)

Table

HoleCurrent position (mm)Target position (mm)
J4 (top-left)(-22.4385, 27.0960)(-15.7250, 20.7250)
J5 (top-right)(22.4631, 27.0960)(15.7250, 20.7250)
J6 (bottom-left)(-22.4385, -27.3947)(-15.7250, -20.7250)
J7 (bottom-right)(22.4631, -27.3947)(15.7250, -20.7250)
  • Board half-width = 25.25 mm, half-height = 30.25 mm
  • Target X magnitude = 25.25 − 9.525 = 15.725 mm
  • Target Y magnitude = 30.25 − 9.525 = 20.725 mm
How to enter exact coordinates in Flux This is the most relevant entry I found related to precise placement:
“Setting Pad Position
Precise pad positioning is crucial for component alignment and manufacturability. You can:
Method 1: Drag and Drop
  • Simply click and drag pads to position them visually
Method 2: Precise Positioning
For exact placement:
  1. Select the pad to move
  2. Navigate to the "Object Specific Rules" in the right panel
  3. Find the Position rule
  4. Enter the desired x and y coordinates in millimeters
  • You can also use "in" and "mil" for inches and mils (thousandths of an inch)” Source
Apply those steps to each mounting hole component to set the target X, Y values above. If you prefer a different multiple of 3/8 in (e.g., 3/4 in), tell me and I’ll compute the new targets.
Use 3/8" offsets
Confirm hole pattern
Switch to M3 holes
Align holes to outline
Check connector clearance
J7
J6
MountTR
J4
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Modest Purple Replicator

Modest Purple Replicator thumbnail
System Architecture Overview with PWM Interface, Power Stage, Protections, EMI Filters, Connectors, Hall-Effect Current Monitoring, 4-pin JST-XH Control Header, Isolation & Default-OFF PWM Behavior, Compact Mechanical Layout #hall-sensing #isolated-control #compact-layout

Properties

4-pin JST-XH isolated control header (3V3_in, GND_iso, PWM_in, IMON_out)

Hall-effect isolated current monitor with RC-filtered output and test point

Compact PCB with defined board outline and mounting holes for mechanical integration

PWM interface Power stage Protections EMI filters Connectors Hall-effect sensor Control header (3V3_in, GND_iso, PWM_in, IMON_out) Mechanical elements (mounting holes, board outline)

Pricing & Availability

Distributor

Qty 1

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$7.20–$9.33

Digi-Key

$9.00–$9.12

LCSC

$13.00–$13.14

Mouser

$23.70–$24.09

TME

$0.28

Verical

$7.32–$9.91

Controls