Ⅷ Hardware Design - Ebyte E49-400T30D Specifications

Chengdu Ebyte Electronic Technology Co.,Ltd.
Ⅷ Hardware design
 It is recommended to use a DC regulated power supply to supply power to the module, the power supply ripple
coefficient should be as small as possible, and the module should be grounded reliably;
 Please pay attention to the correct connection of the positive and negative poles of the power supply,
such as reverse connection may cause permanent damage to the module;

Please check the power supply to ensure that it is between the recommended power supply voltages. If it
exceeds the maximum value, the module will be permanently damaged;

Please check the stability of the power supply, the voltage should not fluctuate greatly and frequently;

When designing the power supply circuit for the module, it is often recommended to reserve more than 30%
of the margin, so that the whole machine can work stably for a long time;

The module should be kept as far away as possible from the power supply, transformer, high-frequency wiring
and other parts with large electromagnetic interference;

High-frequency digital traces, high-frequency analog traces, and power traces must avoid the underside
of the module. If it is absolutely necessary to pass under the module, assuming that the module is soldered
on the Top Layer, lay copper on the Top Layer of the contact part of the module. Copper and well grounded),
must be close to the digital part of the module and routed on the Bottom Layer;
 Assuming that the module is soldered or placed on the Top Layer, it is also wrong to arbitrarily route
wires on the Bottom Layer or other layers, which will affect the stray and receiving sensitivity of the module
to varying degrees;
 Assuming that there are devices with large electromagnetic interference around the module, it will greatly
affect the performance of the module. It is recommended to stay away from the module according to the intensity
of the interference. If the situation allows, appropriate isolation and shielding can be done;

Assuming that there are traces with large electromagnetic interference around the module (high-frequency
digital, high-frequency analog, power traces), the performance of the module will also be greatly affected.
It is recommended to stay away from the module according to the intensity of the interference. Proper isolation
and shielding;

If the communication line uses a 5V level, a 1k-5.1k resistor must be connected in series (not recommended,
there is still a risk of damage);

Try to stay away from some TTL protocols whose physical layer is also 2.4GHz, such as USB3.0;
 The antenna installation structure has a great influence on the performance of the module. Make sure that
the antenna is exposed, preferably vertically upward. When the module is installed inside the casing, a
high-quality antenna extension cable can be used to extend the antenna to the outside of the casing;
 The antenna must not be installed inside the metal shell, which will greatly reduce the transmission
distance.
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E49-400T30D Specifications
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