Posts: 102 Threads: 13 Likes Received: 10 in 8 posts Likes Given: 9 Joined: Mar 2016 Reputation: 3 25-Apr-2016, 11:36 AM (This post was last modified: 25-Apr-2016, 11:53 AM by Luc.) I just come across an interesting hack for the X4R-SB. This way you have SBUS+4 PWM channels available and those 4 PWM channels are mapped to channel 9-12! This mod includes bypassing the SBUS output pins, flashing with X8R firmware and shorting pin 1+2 and SB+3 while binding. Credit goes to a user called djsyl from a french frsky forum. I haven't done the hack yet, waiting for your feedback and thoughts about it, especially flashing with the X8R firmware seems risky to me. My quad: RD-210 / ZMX V3 2206 2140kv / Aikon SEFM 30A / X-Racer F303 V3 / X4R-SB / Dronelab 1500 4S 50C Posts: 102 Threads: 13 Likes Received: 10 in 8 posts Likes Given: 9 Joined: Mar 2016 Reputation: 3 For those of you who are interested: It works great! I don't need the 4th PWM channel, so haven't done the soldering part. I only flashed the X4R-SB with X8R firmware (latest LBT) and bound it as illustrated in the picture. Now I have SBUS 1-8 and 3 true PWM channel 9-11! The mini 3d gimbal works like a treat now My quad: RD-210 / ZMX V3 2206 2140kv / Aikon SEFM 30A / X-Racer F303 V3 / X4R-SB / Dronelab 1500 4S 50C Posts: 5,314 Threads: 672 Likes Received: 3,155 in 1,743 posts Likes Given: 2,027 Joined: Jan 2016 Reputation: 139 that's excellent very good to know! the additional PWM channel can probably used to control the camera's shutter if you want hehe for example the Runcam 2 has released a new firmware that allow you to do that with a pwm channel... • Posts: 70 Threads: 10 Likes Received: 20 in 12 posts Likes Given: 14 Joined: Aug 2016 Reputation: 3 Short question: did you bridge the r35 solder joint with the signal wire? Thanks! Build - Fly - Crash - Repeat • Posts: 947 Threads: 66 Likes Received: 350 in 248 posts Likes Given: 164 Joined: Apr 2016 Reputation: 34 The PWM can also be useful for changing channels on VTX's that supports this. • Posts: 102 Threads: 13 Likes Received: 10 in 8 posts Likes Given: 9 Joined: Mar 2016 Reputation: 3 (06-Sep-2016, 12:54 PM)phara Wrote: Short question: did you bridge the r35 solder joint with the signal wire? Thanks! Since I don't need the fourth pwm channel, I haven't done the soldering. Without doing any measurement I would guess that R35 is not bridged anymore, because it was initially bridged with a zero ohm resistor. (06-Sep-2016, 01:08 PM)oyvinla Wrote: The PWM can also be useful for changing channels on VTX's that supports this. You are right, additional PWM outputs can come in very handy. The beauty of this mod is, that the 3 or even 4 extra PWM outputs are mapped to channel 9,10,11,12 which simplifies transmitter programming. My quad: RD-210 / ZMX V3 2206 2140kv / Aikon SEFM 30A / X-Racer F303 V3 / X4R-SB / Dronelab 1500 4S 50C The following 1 user Likes Luc's post:1 user Likes Luc's post • phara Posts: 70 Threads: 10 Likes Received: 20 in 12 posts Likes Given: 14 Joined: Aug 2016 Reputation: 3 Thanks for clarifying that. So you basicly flashed the X8r software and you are done? I only need one PWM output for my discovery buzzer so this would be great for my needs! Build - Fly - Crash - Repeat • Posts: 102 Threads: 13 Likes Received: 10 in 8 posts Likes Given: 9 Joined: Mar 2016 Reputation: 3 (06-Sep-2016, 02:52 PM)phara Wrote: Thanks for clarifying that. So you basicly flashed the X8r software and you are done? I only need one PWM output for my discovery buzzer so this would be great for my needs! Yes, you only need to flash the X8R software and bind like illustrated in the picture above (shorting pin 1+2 and SB+3 while binding). My quad: RD-210 / ZMX V3 2206 2140kv / Aikon SEFM 30A / X-Racer F303 V3 / X4R-SB / Dronelab 1500 4S 50C • Posts: 7 Threads: 1 Likes Received: 1 in 1 posts Likes Given: 0 Joined: Jan 2016 Reputation: 0 Awesome! The additional PWM channel can be used on radio controlled switch too :-) I'll do this mod! • Posts: 63 Threads: 18 Likes Received: 20 in 14 posts Likes Given: 14 Joined: Oct 2016 Reputation: 1 (06-Sep-2016, 03:00 PM)Luc Wrote: Yes, you only need to flash the X8R software and bind like illustrated in the picture above (shorting pin 1+2 and SB+3 while binding). How do you power the x4r for binding if all 4 signal pins are bridged? • Posts: 5,314 Threads: 672 Likes Received: 3,155 in 1,743 posts Likes Given: 2,027 Joined: Jan 2016 Reputation: 139 11-Dec-2017, 01:26 AM (This post was last modified: 11-Dec-2017, 01:26 AM by Oscar.) (09-Dec-2017, 12:20 AM)CaCondor Wrote: How do you power the x4r for binding if all 4 signal pins are bridged? You only need to bridge the signal pins, 5V and GND don't have to be not bridged (they are connected internally anyway) • Posts: 3 Threads: 0 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Nov 2018 Reputation: 0 07-Nov-2018, 09:16 AM (This post was last modified: 07-Nov-2018, 09:19 AM by Skywalker.) Hi friends. I have a x4rsbus and need to use as a 4 channel pwm for my glider. What i must do ? I don't need sbus output just want 4 channel pwm output. • Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 Very cool! Thanks for sharing this. • Posts: 3 Threads: 0 Likes Received: 0 in 0 posts Likes Given: 0 Joined: Nov 2018 Reputation: 0 (07-Nov-2018, 09:16 AM)Skywalker Wrote: Hi friends. I have a x4rsbus and need to use as a 4 channel pwm for my glider. What i must do ? I don't need sbus output just want 4 channel pwm output. • Posts: 12,099 Threads: 125 Likes Received: 3,738 in 2,835 posts Likes Given: 99 Joined: Feb 2017 Reputation: 388 I assume you just want the X4R-SB to output PWM for servo directly. I believe you just need to bind the receiver without any jumper. Once bound, ch1-4 should work for servo. • |