Top 10 key points for Hardware Engineer Circuit Design

1. Power supply is the lifeblood of the system and cost-saving. This is very beneficial to product stability and passing various certifications.
1. Try to use the fill filter to increase the 104 H inductance. Each chip power supply pin must be connected to a bypass capacitor;
2. Use a Varistor or transient diode to suppress the surge;
3. Separated by mode and digital power, large current and small current circuits are separated by magnetic beads or zero euro resistance;
4. The design should have a margin to avoid overheating of the power chip and use a heat sink when the attack consumption reaches 50% of the rated value.
2. Input Io and remember to pull it up;
3. Output Io, remembering the accounting drive capability;
4. High-speed IO, over-long cabling, the use of a 33-wire resistor to suppress reflection;
5. level matching between chips;
6. Whether the switch device needs to avoid overhead during Transistor Switch;
7. The Board has a testable circuit and can be used to test its functions independently;
8. Important signal test points and ground points should be established;
9. Version ID;
10. Status Indicator.
If you carefully check the above ten points for each schematic design, the success rate of the product design will be improved, the number of changes will be reduced, and the design cycle will be shortened.