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,
Touch response sensitivity and reliability 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. 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 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.
change. 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, input by T1 and T2 pins before power-on
State to decide. details as follows:
⒈T1=1, T2=1 Correspondence: LED touch stepless dimming function without brightness memory suddenly and suddenly dark
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