Buck Converter Design for Ultrasonic Atomizer

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
R1
Resistance
10 Ω
J1 P1 - U4 IN
R3 P2 - C6 P1
R3 P2 - C6 P1
U1 EN - R2 P1
U1 VCCX - C5 P1
R3
Resistance
10kΩ
U1 SW - Q1 G
R2
Resistance
100 kΩ
J2 PIN1 - TP2 TP
C2 P1 - L3 P1
C2 P1 - L3 P1
J3 2 - U2 GND2
L2 2 - D1 A
L1 P2 - C1 P1
U1 VIN - Q1 D
J3 3 - U2 VIN+
L2 2 - D1 A
R3 P2 - C6 P1
U1 VIN - Q1 D
L1 P2 - C1 P1
U4 OUT - L2 1
C2 P1 - L3 P1
U1 SW - Q1 G
L1 P2 - C1 P1
J2 PIN1 - TP2 TP
J1 P1 - U4 IN
U1 SW - Q1 G
U1 EN - R2 P1
J2 PIN1 - TP2 TP
R3 P2 - C6 P1
C2 P1 - L3 P1
U5 VIOUT - R3 P1
J3 2 - U2 GND2
U1 EN - R2 P1
U4 OUT - L2 1
J3 1 - U2 VDD1
U5 VIOUT - R3 P1
J3 3 - U2 VIN+
U1 VCCX - C5 P1
J3 1 - U2 VDD1
TP3
Q2 S - C1 P2
L2
GND
Q2
J3
C3
Capacitance
100 nF
C2 P2 - J2 PIN2
C5 P2 - R2 P2
U1
L1
Inductance
10 uH
C6
Capacitance
10nF
Q1
L3
Inductance
220 nH
C1
Capacitance
10 uF
C2 P2 - J2 PIN2
TP1
C5
Capacitance
100 nF
Q2 S - C1 P2
C2
Capacitance
10 uF
C4
Capacitance
1 nF
TP2
C5 P2 - R2 P2
J1
J7
J2
U3
U4
U5
D1
J6
MountTR
U2
J4

No files yet

Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    No assets added.

    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

    Arrow

    $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