Lemontree

ELRS 915TX

Overview

The PCB is a NANO board suitable for TLITE X9LITE XLITE and other remote controls. The PCB is in the attachment.

The power supply part can be powered by only one power module.
The ESP32 main control can be between 3.3V and 3.45V. The E19 module can be between 3.3V and 5V. The most stable voltage is 3.3V.

Give full play to the performance. E19 is powered by 5V and ESP32 is powered by 3.45V.

By default, the TX resistor is pulled high and the resistor is R5. If the backhaul cannot be used, the R5 resistor can be removed without affecting the function.

How to enable fans

Find EXPRESSLRS_PCB_RX_V3 in targets.h and add code #define GPIO_PIN_FAN_EN in the next line. 16
High power must also be enabled in userdefines to take effect.

FAN is the negative pole of the fan. The transistor can be replaced by MOS. The fan must be turned on above 250MW.

The PCB below is turned on at 250MW and actually sawsawed over 50KM. Other functions have not been tested.

Design Files

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Update:2024-11-24 09:13:36

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