Understanding J3 Connector

kartik20052007

kartik20052007

Please explain what @J3 does and what is the name of this component in schematic diagram
15 days

flux

0:19

Reviewing the bill of materials.

Analyzing the schematic.

Considering file references.

J3 is a 2-pin screw terminal connector named J3.
What it does:
  • It is the motor output connector for the right motor.
  • Pin 1 of J3 is on net M2_OUT_A, which connects to output 3Y of U2.
  • Pin 2 of J3 is on net M2_OUT_B, which connects to output 4Y of U2.
So in plain words:
  • J3 is where you would attach the two wires of the right-side DC motor.
  • U2 drives those two lines to control the motor direction.
The schematic name for this component would typically be:
  • 2-pin screw terminal
  • or 2-position terminal block
If you want, I can also explain what U2 is doing with J3 in the motor driver circuit.
Explain U2 with J3
Check J3 footprint
Review motor outputs
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To and Fro Memory Robot

To and Fro Memory Robot thumbnail
Competition PCB for a to and fro memory robot using through-hole components only. Target layout is maximum 120 mm x 70 mm, 2-layer maximum with top-layer routing only, 0.5 mm trace width minimum design intent, 0.3 mm clearance minimum, restricted solder mask outside the board center, and manufacturing freeze before 15 April 2026. Planned architecture uses a simple 5 V control and drive system with sensor inputs, memory/control logic, motor-driver stage, user controls, and edge-access debug/test points.

Properties

College competition PCB rules

Educational Robotics Competition

Board size <=120 mm x 70 mm; maximum 2 copper layers; route signals on top layer only; minimum trace width 0.5 mm; minimum clearance 0.3 mm; through-hole components only; solder mask restricted outside board center; freeze design before 15 April 2026.

Prototype competition build

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