1. Hydraulic brake pedal

2. Hydraulic clutch pedal (compatible with the SRT Gearbox, with the hydraulic mod)

3. Mechanical clutch pedal (compatible with the SRT gearbox, with the cable clutch mod)

4.Mechanical degressive clutch pedal (not compatible with the SRT gearbox)

Hydraulic brake pedal

Nicolas Leconte had the good idea to adapt the 3D parts of the SRT pedals on the body of Logitech pedals. In addition to reducing the cost, this allows you to connect directly to the electronics of the pedals. With his permission, I share his work with you here:

The hydraulic brake pedal requires the entire hydraulic system, a modified version of the master cylinder support, and some hardware.

We could keep the potentiometer, but I don’t recommend it because it won’t correctly reproduce the force you apply to the pedal.

The files are available on Thingiverse.

PS: cleaner pictures will be taken when I get the banjo screw to mount the hose on the master cylinder.

Shopping list

ELECTRONICS:

1. Hydraulic pressure sensor 500psi 1/8″ NPT (Amazon, Aliexpress, Ebay).If you push EXTREMELY hard you might consider using a 1000 psi sensor. I never exceeded 60%.
2. Cables 3cores 22awg (outer diameter is 4mm).

MECHANICS:

1. Brake caliper : Single piston (A) (Amazon, Aliexpress, Ebay), Double pistons (B), 4 pistons (C)
2. Master cylinder : Willwood or OBP or Ali
3. 0.5kg PLA (Amazon)
4. 1 M8 rod end for Ali master cylinder
5. 1 Banjo M10x1.25 with pressure sensor mount (Ebay) (goes between the brake calipper and the pressure sensor).
6. 1 Banjo UNF 3/8-24UNF (Aliexpress, Ebay) that goes on the master cylinder.
7. 1 brake hose (Amazon, Aliexpress)
8. Joints
9. 2 x M8x35 to mount the master cylinder. Sur Amazon, Aliexpress, ou en magasin de bricolage.
10. 2x M6x16mm (DIN912) (Aliexpress) . To secure the master cylinder support against the Logitech frame.

Hydraulic clutch pedal

The hydraulic clutch pedal is similar to the hydraulic brake pedal, you simply replace the brake caliper with a slave cylinder on which a spring is mounted. This assembly is compatible with the SRT gearbox, with the hydraulic clutch mod.  For the electronics, we keep the original potentiometer.

Shopping list :

ELECTRONICS:

1. Hydraulic pressure sensor 500psi 1/8″ NPT (Amazon, Aliexpress, Ebay).If you push EXTREMELY hard you might consider using a 1000 psi sensor. I never exceeded 60%.
2. Cables 3cores 22awg (outer diameter is 4mm).

MECHANICS:

1. Brake caliper : Single piston (A) (Amazon, Aliexpress, Ebay), Double pistons (B), 4 pistons (C)
2. Slave cylinder (Aliexpress)
3. 0.5kg PLA (Amazon)
4. 1 M8 rod end for Ali master cylinder
5. 1 Banjo M10x1.25 with pressure sensor mount (Ebay) (goes between the brake calipper and the pressure sensor).
6. 1 Banjo UNF 3/8-24UNF (Aliexpress, Ebay) that goes on the master cylinder.
7. 1 brake hose (Amazon, Aliexpress)
8. Joints
9. 2 x M8x35 to mount the master cylinder. Sur Amazon, Aliexpress, ou en magasin de bricolage.
10. 2x M6x16mm (DIN912) (Aliexpress) . To secure the master cylinder support against the Logitech frame.

Mechanical clutch pedal (compatible with the SRT gearbox, with the cable clutch mod)

Allows to control the SRT box, with the cable clutch mode. 3D files are available here. You will then need a bike derailleur cable, and the sheath that goes with it.

We replace a white bushing by this one, that guides the cable.

For the moment, the cable is secured by a screw . I will do something cleaner later.

We insert the hose in a bloc that is taken in the rear axle.

Shopping list :

1. Bicycle derailleur cable (MTB/universal) (Aliexpress)
2. Bicycle derailleur cable hose

Mechanical degressive clutch pedal

Take a look at this mod. I will try to find the time to make it compatible with the previous mod.

The post Logitech G25, G27, G29 pedals appeared first on Lebois Racing.

New lever :

• More space at the ball joint, which allows more angle.
• The preload screw has been moved to be more accessible. We also changed from an M6 hexagon screw to an M5 hexagon socket screw (allen).
• Slight modification of the design to harmonize the pedals (especially with the future P1)
• Print informations are now placed below the lever

Different hydraulic circuit :

• The pressure sensor is now mounted on the caliper. Therefore a banjo bolt with sensor holder M10x1.25 is required instead of the banjo bolt with sensor holder UNF 3/8-24UNF. A new banjo bolt must also be ordered for the master cylinder. The advantage is to ease the bleed procedure (air bubbles were more easily trapped in the top of the banjo bolt that holds the pressure sensor), and also to clear the space behind the lever. This is particularly necessary for the clutch pedal, which can have a long stroke.

When version 6.0 comes out, I plan to keep online all the tutorials and files for version 5.3 REV2.

The post Brake pedal SRT P1 v5.3 REV2 appeared first on Lebois Racing.

1) The pedals

3D printed

Plates can be printed directly in 3D. The contact at the foot is obviously different from that with a metal plate. However, there are two advantages: plastic is not cold (for those who play without shoes and have cold feet in winter), and it allows to customize the dimensions. Feel free to leave a comment if you want me to add dimensions. 3D files available here.

Com

Commercial plates require an adapter to be printed but also allow a realistic feel. Several models are compatible or being added:

1. Logitech G25/G27/G29: you can retrieve Logitech foot plates and mount them on SRT pedals via this adapter.
2. Sparco. This model is compatible by using this adapter. No extra screw to order : you will use the ones provided by Sparco, and the M4 screws needed for the SRT pedals.
3. Sparco Settanta. Available in grey and black. This model is compatible by using this adapter. No extra screw to order : you will use the ones provided by Sparco, and the M4 screws needed for the SRT pedals.
4. 

The post Accessories appeared first on Lebois Racing.

• start and finish position
• spring preload
• spring force

Summary:

1. Presentation
2. Shopping list
3. Building instructions
4. Firmware

1) Presentation

The P1 gas pedal and clutch pedal offers a reliable and solid mechanism. The whole mechanism is based on a compression spring. Forged steel rods can be used to stiffen the lever if necessary.

The clutch simply uses a stiffer spring.

An optional LED strip can be integrated to illuminate the mechanism.

3D files are available on the download page.

2) Shopping list

The shopping list is available here.

3) Building instructions

4) Firmware

The firmware includes the required libraries. You just need to load the code in the Arduino IDE, flash the board, and then adjust the min and max values using the Arduino monitor.

Download

The post SRT Accelerator Pedal P1 appeared first on Lebois Racing.

You want to support this project ? https://www.paypal.me/leboisVR?locale.x=en

Summary:

1. Presentation
2. Features
3. Shopping list
4. Assembly instructions

For info: I do not sell ANY PEDALS OR PRINTED PARTS. That would be trading, and I am not, and do not wish to be a trader. I don’t do black either. No need to ask. However, I am looking for a company that could produce plastic parts for those who do not own 3D printers. If you know of any…

1) Presentation

2) Features

You can tune the lever position by adjusting the bearings position.
There is a screw to add a preload on the master cylinder, so you can shorter the phase of the travel that is very soft.
I use a hydraulic pressure sensor. It acts like a potentiometer. You got only three wires : red (3.3V or 5V), black (ground), green (signal).

Regarding the support:
– Wood version will use wood screws to fix the support to the ground.
– M6 version will use M6 screws to fix the support to the ground.

The Rev2 modifies the system. More informations about the REV 2.

Here is the pictures of the brake pedal (v5.3) REV1:

And in Rev2 :

3) Shopping list

The updated shopping list is now online !

1. Hydraulic pressure sensor 500psi 1/8″ NPT (Amazon, Aliexpress, Ebay).If you push EXTREMELY hard you might consider using a 1000 psi sensor. I never exceeded 60%.
2. Cables 3cores 22awg (outer diameter is 4mm).

Mechanics:

1. Brake caliper : Single piston (A) (Amazon, Aliexpress, Ebay), Double pistons (B), 4 pistons (C)
2. Master cylinder : Willwood or OBP or Ali
3. 1kg PLA (Amazon)
4. 2 bearings KP001 12mm (Amazon, Aliexpress, Ebay) (Each SRT pedal requires two 12mm KP001)
5. 1 M8 rod end for Ali master cylinder, or this one for the Willwood and OBP. 
6. 1 Banjo M10x1.25 with pressure sensor mount (Ebay) (goes between the brake calipper and the pressure sensor).
7. 1 Banjo UNF 3/8-24UNF (Aliexpress, Ebay) that goes on the master cylinder.
8. 1 brake hose (Amazon, Aliexpress)
9. Joints

Screws :

– 1 x M5x50mm DIN912 for the preload (Aliexpress)

– 2 x M4x20mm Flat Head Countersunk and 2x m4 nuts. This Amazon kit contains the two screws and many others that will be useful for other projects.

– 3 xM8x35 : 2 for the master cylinder, 1 for the M8 rod end. (Aliexpress)

– 1 x M12x100 metal axle (Amazon, Aliexpress, Ebay)

How to choose the master cylinder ? A priori, there are many master cylinders compatible. The chinese model is the one that I have been using almost since the beginning, and it clearly does the job. Otherwise you can use other brands. Beside the dimensions, you need to mind foor numbers :

– Thread inlet : for the oil reservoir. If it’s not integrated, you need to find one.

– Thread outlet : This is where the banjo is installed, so it needs to match the banjo thread. The one advised above is 3/8″-24 UNF.

– Piston axle thread : it needs to be M8, because the rod is M8.

– Piston diameter : bigger = shorter stroke and harder resistance. The advised master cylinder is 0,7″.

4) Assembly instructions

1) Install the master cylinder in the master cylinder holder

• Use one M8x35mm bolt and M8 nut for each hole.
• The head of the lower bolt goes at the back.

2) Install the M8 rod end in the brake lever

3) Use one M8x35mm screw to secure the M8 rod end. It should tight into the plastic

4) Slide the M12 Axle into the brake lever

5) Slide the KP001 bearings to the M12 axle

6) Fix the KP001 bearings to the ground

7) Screw the master cylinder axle into the M8 rod.

8) Fix the master cylinder support to the ground.

9) Build the hydraulic system

(to be continued soon)

The post SRT brake pedal P1 v5.3 appeared first on Lebois Racing.

Table of contents

1. Logitech (G27, G29, G920)
2. Simucube 1
3. Simucube 2
4. Arduino
5. Leobodnar
6. Thrustmaster

The vast majority of pedal sets use potentiometers. As the accelerator is based on a potentiometer, and the hydraulic pressure sensor also behaves like a potentiometer, you can connect this pedal sets to most of the steering wheel bases (logitech, Simucube, Thrusmaster…).

Alternatively it can be connected to a Leobodnar or Arduino card which is then connected to the PC via a USB cable.

1) LOGITECH (G27, G29, G920…)

You can connect the SRT pedal set to a G27 or G29 steering wheel. To do so, use a VGA male connector with the following pins:

1 – Ground (0v)

2 – Accelerator

3 – Brake

4 – Clutch

5 –

6 – VCC (+5v)

7 –

8 –

9 – VCC (+5v)

2) SIMUCUBE 1

The pedals can be connected to the X11-upper port. See details on the Simucube documentation.

Pin 1 is the rightmost one. A RJ45 (8P8C) cable must be used.

1 – Brake

2 – Throttle

3 –

4 – VCC ( +3,3V)

5 – Clutch

6 –

7 –

8 – Ground (0V)

3) SIMUCUBE 2

There is a “SC accessory port” on which there are pins to connect pedals, it’s female vga db15.

See the documentation available here. You can use this type of male connector. The pins you are interested in :

2 – Ground (0V)

6 – Throttle

7 – Clutch

8 – VCC (5V)

13 – Brake

15 – Ground (0V)

4) ARDUINO

If you don’t want to plug the pedals into your steering wheel, using an arduino card is the cheapest solution. The following code allows you to manage from one to three pedals. It only works with Arduino Leonardo and Micro cards (fitted with ATmega32u4 CPU). The required libraries are included in the code.

Download

5) LEOBODNAR

This adapter allows you to connect the SRT pedals without having to manipulate a code. Indeed, Leobodnar provides an easy to use software that allows to calibrate the pedals.

I created a junction box: a male VGA connector on one side, and three output cables (diameter AWG22, it’s the one indicated in the pedals stroke list. There is an anti-tearing system that ensures reliable operation. The 3D files are on Thingiverse. The male connector can be ordered here on Amazon, or Aliexpress.

6) THRUSTMASTER

The Thrustmaster T-GT, T300, T150, TS-XW, TX and TMX steering wheels are connected to the pedal sets though an RJ12 6P6C (6-wire) cable. If you don’t know where the 1 is on your cable, look at the color codes on Google.

1 – Brake

2 – Throttle

3 – Clutch

4 – VCC ( +5v)

5 – Ground ( 0v)

6 – Ground ( 0v)

The post Interfaces for the pedals appeared first on Lebois Racing.