WLtoys 10428A 3-ch receiver

thingiverse

This is a housing for a 3ch receiver for WLtoys 10428A RC Crawler. My original electronics took 10 minutes of snow drive to fail, so I had to replace it. This unit is receiver only, it is made for standard 3-pin servo. The unit has not been tested for any length of time, so you are using this on your own risk. You can build this with the following parts: - Arduino Pro Mini: https://www.aliexpress.com/item/1pcs-lot-Pro-Mini-Module-Atmega328-5V-16M-with-Arduino-Compatible-With-Nano/32672852945.html?spm=2114.search0104.3.13.24d73252qstaua&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_5711320_10344_10068_10342_10343_10340_10341_10698_10697_10696_10084_5722520_10083_10618_10304_10307_10301_5711220_5723020_10059_5722620_5722920_10534_308_5722720_5722820_100031_10103_441_10624_10623_10622_10621_10620,searchweb201603_28,ppcSwitch_5&algo_expid=d83c7ee0-84f5-4868-b4dd-eeb4b46f4fa2-4&algo_pvid=d83c7ee0-84f5-4868-b4dd-eeb4b46f4fa2&transAbTest=ae803_1&priceBeautifyAB=0 - nrf24L01 breakout board: https://www.aliexpress.com/item/Free-Shipping-1PCS-NRF24L01-wireless-data-transmission-module-2-4G-the-NRF24L01-upgrade-version-We-are/32501134468.html?spm=2114.search0104.3.1.6ce379daPHopHA&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_5711320_10344_10068_10342_10343_10340_10341_10698_10697_10696_10084_5722520_10083_10618_10304_10307_10301_5711220_5723020_10059_5722620_5722920_10534_308_5722720_5722820_100031_10103_441_10624_10623_10622_10621_10620,searchweb201603_28,ppcSwitch_5&algo_expid=73546353-3745-4682-ba36-f2778819c688-0&algo_pvid=73546353-3745-4682-ba36-f2778819c688&transAbTest=ae803_1&priceBeautifyAB=0 - 5V to 3.3V regulator: https://www.aliexpress.com/item/10Pcs-5V-To-3-3V-DC-DC-Step-Down-Power-Supply-Buck-Module-AMS1117-800MA/32838774398.html?spm=2114.search0104.3.8.17a239f0OrKpPr&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_5711320_10344_10068_10342_10343_10340_10341_10698_10697_10696_10084_5722520_10083_10618_10304_10307_10301_5711220_5723020_10059_5722620_5722920_10534_308_5722720_5722820_100031_10103_441_10624_10623_10622_10621_10620,searchweb201603_28,ppcSwitch_5&algo_expid=50a8b254-f5e0-4063-a13d-c684c7dfeaac-1&algo_pvid=50a8b254-f5e0-4063-a13d-c684c7dfeaac&transAbTest=ae803_1&priceBeautifyAB=0 Bind procedure: Stick in the bind plug as seen on the picture. Turn on the transmitter (Tx). Turn on the receiver. Long-press "BIND" on the Tx. The Rx should bind to the Tx. Relese the BIND button after a few seconds. You should be bound. Check the steering is working smoothly. Remember to remove bind plug. Fail-safe: Sets throttle to 90° (not trim value) and keeps other channels last values. Wiring: I uploaded the Fritzing file for connection, Fritzing itself can be downloaded here: http://fritzing.org/home/ Sorry I never used Fritzing, but I think it is clear enough. Firmware upload: You will upload the firmware by using a usb2serial adapter, this one matches my pro mini pinout: https://www.aliexpress.com/item/1pc-Basic-Breakout-Board-For-FTDI-FT232RL-USB-to-Serial-IC-For-Hot-Top-Sale/32648158894.html?spm=2114.search0104.3.8.2daa59adSCL91O&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_5711320_10344_10068_10342_10343_10340_10341_10698_10697_10696_10084_5722520_10083_10618_10304_10307_10301_5711220_5723020_10059_5722620_5722920_10534_308_5722720_5722820_100031_10103_441_10624_10623_10622_10621_10620,searchweb201603_28,ppcSwitch_5&algo_expid=19c21db8-f892-4582-9f86-4b2c3dc9ef32-1&algo_pvid=19c21db8-f892-4582-9f86-4b2c3dc9ef32&transAbTest=ae803_1&priceBeautifyAB=0 The SW used to upload is Xloader, baud rate 57600: http://russemotto.com/xloader/ Let me know how it goes. 27.4.2018: V2 housing Modified housing now for featured PCB: https://oshpark.com/shared_projects/HbG4uvoM This board requires soldering (LM1117 regulator, a few capacitors and resistors). Also I removed the reset button on my Arduino Pro Mini clone. Please note the Pro Mini is "SMD" soldered, I do not use wires. The housing now clicks together, no glue necessary. Range is not huge, about 30~40m depends on orientation. The firmware is the same. The channel sequence is the same: - steering - throttle - gear - bind Fail safe is also the same. 30.4.2018: V3 of the housing. I realised I was playing a dangerous game by having one of the pins press on the MCU, so I changed the design. All holding pins now touch only the PCBs.