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ELRS-8285-1280-PWM-ESC

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A 2.4 GHz ELRS resceiver with PWM output and a 1S, 5A ESC

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# ELRS-8285-1280-PWM-ESC
A 2.4 GHz ELRS resceiver with 4 PWM outputs and a 1S, 5A ESC

### Revision 1.1
- should now be more robust with two servos on one channel through a Y cable
 - adjusted pull-up value on PWM1
 - added pull-up on PWM2
- this required a minor layout change for the added pull-up

### Overview:
- 2.4 GHz ExpressLRS receiver, ESP8285 based, with WiFi antenna
- 4 Servo PWM outputs
- on-board ESC
 - Up to 5.5 V input voltage (1S LiPo or HV-LiPo)
 - BLHeli_S I_H_40 (I didn't test if deadtime can be reduced - it probably can)
 - Handled 5 A for over a minute on the bench without damage: bench power supply set to 4.5 V, Mamba 1408 4000KV, HQProp DP 4x3x3. There was a cover over the ESC to reduce airflow from the prop.
- Voltage divider to measure battery voltage (not yet supported by ExpressLRS, 20211230)
- Testpads to flash ESC firmware through the EFM8's UART - can also be used with an external flight controller and serial passthrough to configure the ESC and re-flash it
- ExpressLRS can be flashed through the servo header

RCGroups discussion thread: https://www.rcgroups.com/forums/showthread.php?4040599-DIY-ExpressLRS-2G4-Rx-with-4xPWM-output-and-an-on-board-1S-ESC#post48415931

ELRS-8285-1280-PWM-ESC

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