Smart Electronics Capacitive touch dimmer Constant pressure stepless dimming PWM control panel type LED switch module | Электронные

Smart Electronics Capacitive touch dimmer Constant pressure stepless dimming PWM control panel type LED switch module | Электронные

Features

The touch dimming module can realize the touch switch control and brightness adjustment of LED lights. It has the following features and advantages:

⒈The brightness of the light can be adjusted at will according to the needs, with a wide selection range and simple and convenient operation.

⒉The touch function can be realized under the isolation protection of medium (such as glass, acrylic, plastic, ceramic, etc.), with high security.

⒊The application voltage range is wide, and it can be arbitrarily selected between 2.4~4.5V.

⒋The application circuit is simple, the peripheral components are few, the processing is convenient, and the cost is low.

⒌Good anti-power interference and mobile phone interference characteristics. EFT can reach more than ±2KV; in the case of short-distance, multi-angle mobile phone interference, the sensitivity and reliability of touch response are not affected.

6. Installation: There is no need to directly touch the copper foil, and the light can be dimmed through acrylic glass or plastic of more than 3mm.

7. Purpose: It can control LED modules, light strips and other products. Suitable for indoor desk lamps, LED lighting dimming, DIY car lights dimming and refitting the best accessories.

8. Function: Single-line touch, using the principle of capacitive touch, the sensor is sensitive and can be touched at your fingertips. The default is to have the switch function, dimming function, and the LED touch stepless dimming function with brightness memory gradually brightening and dimming. It slowly brightens when the light is turned on, and slowly darkens when the light is turned off, effectively avoiding eye irritation.

9. Dimming mode: stepless PWM dimming

10. Wiring mode: (VCC, GND) in the PCB board is the power input, (LED+, LED-) is connected to the positive and negative levels of the LED light (fingerprint) is connected to the touch area, and it can also be wired out (note that the wiring is not too long and the wire is out Later, it is recommended to use a small copper sheet as the sensing area), and the copper sheet area is recommended to be about 2x3cm. The copper foil module on the board has one side of the copper foil attached to the shell side.

11. How to use

a) When clicking touch (the touch duration is less than 550ms), the light can be controlled on and off. Click the touch once, the light is on; click again, the light is off. The initial brightness of the light is fixed at 90% of the full brightness.

b) When long press the touch (touch duration is greater than 550ms), the light can be adjusted stepless brightness. One long press of the touch, the light brightness gradually increases, when the light is released, the light brightness stops at the corresponding brightness at the moment of release, if the long press time exceeds 3 seconds, the light brightness will not change after reaching the maximum brightness; long press the touch again, The brightness of the light gradually decreases, and the brightness of the light stops at the corresponding brightness when the release is released. If the long press time exceeds 3 seconds, the brightness of the light will not change after reaching the minimum brightness. So cycle.

12. Debugging tips

If a false trigger occurs or does not trigger during debugging, it may be caused by the following reasons:

a) The touch line is too thick

b) The touch line is too long

c) The copper sheet is not big enough

d) Interference near the switching power supply terminal

e) The touch parameter C1 is unreasonable

Technical features:

◆TI touch input corresponds to LED light control output. There are four functions to choose from, which are determined by the input state of the T1 and T2 pins before power-on. details as follows:

⒈ T1=1, T2=1 Correspondence: LED touch stepless dimming function without brightness memory suddenly and suddenly dimming

⒉T1=0, T2=1 Correspondence: LED touch stepless dimming function without brightness memory, fade-in and fade-out

⒊ T1=1, T2=0 Correspondence: LED touch stepless dimming function with brightness memory gradually brightening and dimming

⒋T1=0, T2=0 corresponding: LED three-segment touch dimming function

◆The LED touch stepless dimming function without brightness memory is as follows:

△When initially powered on, the light is off.

△When you click and touch (the touch duration is less than 550ms), the light can be controlled on and off. Click the touch once, the light is on; click again, the light is off. So cycle. When the light is on or off, there is no brightness buffer. And the initial brightness of the light is fixed at 50% of the full brightness.

△Long touch (touch duration is greater than 550ms), the light can be adjusted stepless brightness. One long press of the touch, the light brightness gradually increases, when the light is released, the light brightness stops at the corresponding brightness at the moment of release, if the long press time exceeds 3 seconds, the light brightness will not change after reaching the maximum brightness; long press the touch again, The brightness of the light gradually decreases, and the brightness of the light stops at the corresponding brightness when the release is released. If the long press time exceeds 3 seconds, the brightness of the light will not change after reaching the minimum brightness. So cycle.

△Click touch and long touch touch can be used at any time without interference and restriction of mutual functions.

◆The LED touch stepless dimming function without brightness memory fades brightly and dimly is based on the LED touch stepless dimming function without brightness memory sudden dimming, when the light is turned on and off by clicking the touch Make the light slowly and smoothly transition from a lower brightness to the initial brightness when the light is turned on. When the light is turned off by tapping the touch, the light will be slowly and smoothly reduced from the current brightness until it is turned off, so as to achieve a visual buffer effect of slow brightness changes, which protects eyes and The effect of vision.

◆The LED touch stepless dimming function with brightness memory gradually brightens and dims is to increase the brightness memory function on the basis of the LED touch stepless dimming function without brightness memory gradually brightens and dims. That is, when the power supply is uninterrupted, the brightness of each touch to turn off the light will be memorized, and the brightness will be used as the initial brightness when the light is turned on next time. In the case of power failure, the first touch to turn on the light after re-powering, the initial brightness is fixed at 50% of the full brightness.

◆LED three-segment touch dimming function

△When initially powered on, the light is off.

△Each time you click on the touch, the light brightness will change cyclically according to low brightness→medium brightness→high brightness→off.

Sensitivity adjustment

The larger the capacitance value, the higher the sensitivity; the smaller the capacitance value, the lower the sensitivity.

To adjust the touch sensitivity, see the following table:

Note: When the output of the constant voltage dimmer is connected to the LED, the upper current resistance must be connected in series!

Current limiting resistance calculation method: R = (Vi-Vled) / Io

Among them, Vi is the input voltage, Vled is the total voltage drop of all LED lights, and Io is the total current of the light string. The floating range of Vi and Vled should be considered when calculating. Generally, Vi will be too large when the battery is fully charged. After the LED heats up, Vled will drop! Prevent over-current from burning the module or lamp beads.

Shipping list

One LED touch dimming module (finished product, packed in electrostatic bag)