Pyroterra Lighttoys FT2 Manuel utilisateur

Pyroterra Lighttoys

presents

FT2 CHIP

INSTALLATION GUIDE

v1.4

Note: installation of the FT2 chip must be performed

only by individuals with knowledge of electronic

circuits and soldering skills.

Introduction

FT2 chip brings the power of digital pixel LED strips into your custom

LED decorations, costumes and props. The FT2 chip oﬀers full

compatibility with FT remotes, other Lighttoys props and the

LtComposer programming software. Thanks to its cutting-edge

features and ﬂexible installation options, FT2 chip opens new

creative possibilities for the discerning artist.

Chip speciﬁcation

dimensions: 58 x 16 x 6 mm, weight: 4.9 g

supported LED strips: 5V digital LED strips (APA102, WS2812,

WS2813 variants)

supply voltage: 3.3-5.0V, stabilized output voltage: 4.0V

max. output power: 40W / 10A (~180 LEDs at max. brightness)

number of LEDs: 10-300 (per each digital output)

operational temperature: -10°C to +90°C

USB-C fast charging: yes 1.5A

Modes of operation

The FT2 chip can be installed & operated in 2 diﬀerent ways:

A) Battery powered using the voltage converter (recommended)

B) Bypassing the voltage converter (advanced)

A) Battery powered using the voltage

converter

This is the recommended use of the FT2 chip in most scenarios.

The FT2 chip includes a DC-DC boost voltage converter that manages

stable output voltage (~3.9V), even as the battery voltage drops

under high load and discharge, providing a stable and reliable

functionality of the attached LED strip(s).

Digital LED strip attachment

The FT2 chip is fully compatible with the 4-wire APA102 LED strip and

the 3-wire WS2812 LED strip (including all their variants). We

recommend the APA102 based on its superior performance.

The FT2 chip has 2 sets of digital outputs, one from each side of the

board. The digital output #2 is turned oﬀ by default, the digital

output #1 comes preconﬁgured as follows:

LED strip type: APA102 (4-wire interface)

LED count: 60 pixels

This conﬁguration can be later changed in the LtComposer software.

4 wire digital LED strip

If you have decided to use the 4-wire LED strip type with separate

clock and data signals (e.g. APA102, APA107, SK9822), connect its

digital input pads to the FT2 chip as follows:

3 wire digital LED strip

If you have decided to use the 3-wire LED strip type with one data

signal (e.g. WS2812, SK6812), connect its digital input pads to the FT2

chip as follows:

3+1 wire digital LED strip

If you have decided to use the 3+1 wire LED strip type with extra

backup (redundant) data line (e.g. WS2813, SK6822), connect its

digital input pads to the FT2 chip as follows:

Battery connection

The FT2 chip is designed to be powered from a single 3.7V Li-ion

battery, or several Li-ion batteries connected in parallel (to increase

the total discharge current & capacity).

When opting for the parallel conﬁguration, make sure the batteries

are sourced from the exact same manufacturer, type and batch.

Protection circuit on each battery is highly advised.

Caution: supplying voltage higher than 5V or reversing the polarity of

the battery will damage the FT2 chip!

When selecting a suitable battery for your LED project, you can use

the following approximate formulas for battery capacity & discharge

current:

Total capacity (mAh) = ~ no. of LEDs x 15

Discharge current (A) = ~ no. of LEDs x 0.05

A low resistance of the power lines is critical. Always use thick

(>0.75mm2/20AWG) & very short (<20cm) cables between the FT2

chip and its battery. The voltage drop should be less than 0.1V at full

power. If you need to use any connectors, use only the high current

types like XT60, Deans or EC3.

Powering up

Now that you have connected the digital LED strip and the battery, it

is time to power up the FT2 chip for the ﬁrst time!

First, connect an USB charger cable to the USB-C connector. If the

attached battery is not yet fully charged, the charging LED should

start pulsing in blue color, indicating a charging process.

Now, press the ON/OFF button for 1 second to power up the chip. If

you have the APA102 LED strip type connected, you should already

see the power up indication (light ramping up) on its LEDs.

If you have the WS2812 or WS2813 LED strip type connected, there

will be no light output yet, the FT2 chip must be conﬁgured in the

LtComposer software ﬁrst.

FT2 chip conﬁguration

Attach the FT2 chip with an USB cable to your computer, make sure it

is turned on and start the LtComposer software (version 3.5+). The

FT2 chip should be detected as connected in the status bar:

Click on the Devices menu at the top, then select the FT2 chip and

click on the Factory conﬁg button.

A new window will open, where you can give your FT2 chip its default

name, set the pixel length (resolution), LED strip type and which

digital outputs will be active.

Click Apply to device to save the new conﬁguration into the FT2 chip

and turn it oﬀ / on. Your FT2 chip should be now ready to use!

Troubleshooting & FAQ

Problem: the chip seems dead when the ON/OFF button is pressed

and the charging LED is not shining when attached to the USB

charger.

1) Check your battery cables for no short-circuit or reversed polarity.

2) Check that the battery is not faulty, producing a stable voltage in

the range 3.3-4.2V.

Problem: the digital LED strip is not shining at all, or showing

random / white color.

1) Check the connection of DATA / CLOCK wires.

2) Check that the correct digital output (1 or 2) is used.

3) Make sure the LED strip type (APA102 vs. WS2812) matches the

conﬁguration set in LtComposer.

4) Replace / cut the LED strip, the ﬁrst LED can often be broken.

Problem: when I power on the chip and display some color on the

LED strip at full intensity, the LED strip blinks in red color and the

chip immediately turns oﬀ.

1) The battery is empty, attach a 5V USB charger to the FT2 chip

USB-C port and leave it charge to the full, until the blue charging LED

stops pulsing.

2) The battery is undersized and not supplying enough power when

under stress. Use a more powerful battery or several batteries

connected in parallel.

Problem: when I display white color at maximum brightness on the

LED strip, the color changes to dim yellow / orange after a while.

1) The thermal protection of the voltage converter got activated and

reduced the output voltage. Improve the cooling of the chip or

reduce the max brightness in the FT2 conﬁguration window in

LtComposer.

FT2 chip mounting

The FT2 chip can be installed into your target device using the two

2mm mounting holes and M2 sized PCB standoﬀs (not included):

If you are using metal standoﬀs, make sure to put M2 nylon washers

from both sides of the chip hole, to prevent a short-circuit of the

neighbor pads.

The FT2 chip can get very hot, especially when used at the maximum

rated output. Never put the FT2 chip into a plastic shrink wrap or

airtight conﬁned space. In some cases, ventilation holes might be

necessary.

Note: FT2 chip contains thermal protection - if the temperature

reaches 100°C, the chip will turn oﬀ to protect itself.

Using the external interface

In some projects, you might want to use your own ON/OFF button

and USB connector that are externally mounted and connected to the

chip with hookup wires. In such cases, use the auxiliary connection

pads around the holes:

Connect your external ON/OFF button switch between the BAT+ and

SW pads. Use the push button (tactile) type of switch, not a rocker

type of switch:

Connect a LED diode (forward voltage: 1.7-3.3V) between the LED+

and any GND pad to get an external battery charging indication.

When opting for an external USB-C connector, please make sure the

CC1 and CC2 pins are connected to the ground using two 5.1 KOhm

resistors, otherwise the fast charging capability of the FT2 chip won’t

work. See the connection diagram below:

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