Altium Designer : Shorcuts for Routing and Toggling Single Layer Mode

Altium Designer: Useful Shortcuts for Component Placement

  - Rotate counterclockwise by 90 degrees while moving an object : SPACEBAR
  - Align selected objects by top edges  : SHIFT + CTRL + T
  - Distribute selected objects equally in horizontal plane : SHIFT + CTRL + H
  - Align selected objects by left edges : SHIFT + CTRL + L
  - Align selected objects by right edges : SHIFT + CTRL + R
  - Distribute selected objects equally in vertical plane : SHIFT + CTRL + V
  - Align selected objects to grid : SHIFT + CTRL + D
  - Align selected objects by bottom edges : SHIFT + CTRL + B

Altium Designer : Pcb Panelization

On the Place tab, Select Embedded Board Array/ Panelize. Click anywhere in the PCB area. Under Properties menu, select your PCB and set desired Column margin and Row spacing.

Altium Designer : Creating Board Outline From Mechanical Outline and Making Cutout Holes

Select Mechanical Outline. Under Properties menu, Change Mechanical outline layer to user defined board outline layer.
To create custom board shape, select board outline that has been created. On the Design Tab, in the board shape, select Define from selected Objects.
To create a cutout hole, select the desired outline. On the Tool Tab, in the Convert, select Create Boardcutout from selected primitives.

Altium Designer : Moving Design Origin to User's Preferred Location

On the Edit tap, in the Origin,  choose Set.

Altium Designer, Shortcuts for Viewing, Changing Grid and Snap Setting

Toggle measurement Unit : Q
Accessing Grid menu : G
Changing snap setting : SHIFT + E
Switching 2D and 3 D View : 2 & 3
Fit all objects into view : CTRL + PAGE DOWN
Zoom in around cursor (zooms around cursor, position the cursor first) : CTRL + Mouse-wheel up (or PAGE UP)
Zoom out : CTRL + Mouse-wheel down (or PAGE DOWN)

AAA Battery Protection with Wrong Polarity LED Indicator

This simple circuit will protect AA or AAA battery from wrong polarity connection to your device. If the battery is connected in opposite way, D1 will conduct and PTC Fuse will break the circuit. Wrong polarity indicator, LED 1 will be turned on at the same time.

A Basic Transistor Amplifier with self-bias

This circuit will amplified the input signal with self-bias or feedback which can prevent amplitude distortion. However, it has two small drawbacks. It is only partially effective and, therefore, is only used where moderate changes in ambient temperature are expected.It reduces amplification since the signal on the collector also effects the base voltage. This is because the collector and base signals for this particular amplifier configuration are 180 degrees out of phase (opposite in polarity) and the part of the collector signal that is fed back to the base cancels some of the input signal. This process of returning a part of the output back to its input is known as DEGENERATION or NEGATIVE FEEDBACK. Sometimes degeneration is desired to prevent amplitude distortion (an output signal that fails to follow the input exactly) and self-bias may be used for this purpose.

Common Mode and Differential Mode Filters to limit EMI Issues

This EMI filter include common-mode filter and differential mode filter. Generally Differential mode filter filters noise less than 30MHz and Common mode filter filers noise from 30 MHz to 100 MHz. Both filter have an effect on the entire frequency where EMI needs limiting.

Simple Logic Gates using Diodes

Diodes can be used for implementing simple logic gates such as AND or OR combinations. For AND gate, all inputs must be tie to high, 5V for the output logic high. For OR gate, the output is high if any input(s) are high.

Emergency Phone Charger From 3 x AA Battery with output Protection

Three AA batteries (3 x 1.5V) is using as emergency power source for mobile device or phone charging. Output current is limited to 0.5A and protected from out short circuit or high current drawn from the batteries.