I decided to create my own device for an RC CAR for SPEEDRUN  that helps with linear acceleration in a certain amount of time.

Similar devices have long been available for motorboating and are also last time   developed   for RC models.

https://en.wikipedia.org/wiki/Perfect_Pass

https://www.wikiwand.com/en/Perfect_Pass

https://www.islandhobbynut.com/product-page/perfect-pass-rc-car-launch-control

I came up with my own name as Smooth Throttle   :-)   SmooTHrottle

In my device, the ramp delay time is remotely set on demant using just an additional channel available on the analog knob.

Delay time for reach full throttle can be set up to 20 seconds    - !!!!!   any time  from 0 to 20s  :-)

Curve shape can be programmed individually on requests.     video here >>   https://youtu.be/9SwpYj7azmg

Most interesting in my version is this, that we can remorelly on demand change any RAMP TIME.

Very useful on public road, just in any moment you can off PerfectPass and car react imediatelly for your throttle.

Before starting ride you can choose rump up time on demand ;-)

More info about new curve testing  here  https://www.facebook.com/groups/2046190705670327/posts/3516054098683973/

Work in progress :-) Current version  V1.05

Full reverse - 1000ms
Neutral - 1500ms
Full Throttle 2000ms

LED diagnostic and status of Throttle

•   3 sek -  NO signal fro receiver  -   very very slow  -  one blink every 3 second

•   1 sek             - full  reverse  -       1 blink per second

•   500 msek  - neutral                      2 blink per second

•   100 msek  - full  Throttle           10  blink per second)

•    20  msek -    throtle  above or below neutral   :-)  - blink very very fast  

Better perform calibration  RADIO to  STPP- but if you skip - no tragedy

Cehcking calibration RX  to STPP:

1. Connect  STPP  to receiver

2. not connect ESC

3. power receiver - for example connect  ESC  to other not used port - better if port is in neutral

4. turn on power to RX -  not turn transmitter

5. observe - LED blink  3 second

6. Power on transmitter  -  Led should blink  1 second

7. set AUX  (CH3 to max negative)

8. press Throttle to MAX -  LED should blink 10x per second on full throttle

9. press Throttle to REV -  LED should blink 2 second per second on full throttle

NEUTRAL can be set by SUB TRIM Throttle or Trim Throttle -  just to LED blink 1 second

REVERSE can be set using EPA Throttle

MAX Throttle can be set by  EPA Throttle

Changing settings on CH3 AUX se can observe longer time to  reach full Throttle

CONNECTING  to ESC

1. Connect all as on diagram

2. Set CH3 AUX to minimum  ( -100% )

3. perform ESC Calibration

4. For CASTLE  

   1. turn on Transmitter

   2. Pres full Throttle and hold

   3. POWER ESC .....  wait for melody  `` 4 sec

   4. Full reverse  ....   wait for melody  ~~ 4 sec

   5. Neutral ....   wait for melody  ~~ 4 sec

   6. Ready

IMPORTANT INFO

• Signal PWM  from module to ESC is limited  to 50 Hz 

• Most radio work with signal  PWM below 200Hz  - for car ESC  refresh faster than 100Hz is not needed.

• For radio FlySky Noble 4 - please set signal to ESC below 200Hz - recomended  50 up to 100Hz

• Not exceed 200Hz - faster signal will be ignored

For example in NOBLE

REMEMBER - always propper set  FAILSAFE in your RADIO   !!!  - read manual !!!  when you OFF transmitter Throttle and Sterring need go to neutral!!!