Capacitive Touch Dimmer Constant Pressure Module

Capacitive touch dimmer Constant pressure step-less dimming PWM control panel type LED dimmer switch module

Touch dimmer module can achieve LED light touch switch control and brightness adjustment. It has the following features and benefits:

• Light intensity can be adjusted according to need, a wide range of options, easy operation.
• Be in the presence of media (such as glass, acrylic, plastic, ceramic, etc.) to achieve isolation protection case touch functionality and high security.
• Application voltage range, optionally between 2.4 ~ 4.5V.
• Application circuit is simple, few peripheral devices, easy processing and low cost.
• Anti-power interference and interference characteristics of a good phone. EFT can reach ± 2KV above; close, multi-angle cell phone interference, Touch response sensitivity and reliability is not affected.
• Installation: no direct contact with the copper foil, may be separated by more than 3mm acrylic glass or plastic dimming.
• Usage: LED modules can be controlled, with lights and other products. Suitable for indoor table lamp, LED lighting dimmer, DIY lights dimming retrofit best accessories.
• Function: touch-line, the use of capacitive touch principle, namely the induction sensitive fingertips. The default is a switching function, dimming function with brightness memory slowly fades the LED touch stepless dimming function. When the lights brighten slowly, slowly dimmed lights, effectively avoiding eye irritation.
• Dimming mode: Stepless PWM Dimming
• Wiring: PCB board (VCC, GND) power input, (LED +, LED-) is connected to the positive and negative grade LED lights (fingerprint) is connected to a touch area, but also wiring leads (note the wiring is not too long, outlet Available with a small copper after doing the sensing area), copper area recommendations about 2x3cm. Board comes copper foil module attached to the side of the housing side.

How ToUse:
light a) tap the touch (touch duration is less than 550ms), it can achieve control lights off. One-click touch, lights; again tap the touch, light off. Illumination lighting fixed initial luminance of 90% of the full brightness.

b) Press and touch (touch duration greater than 550ms), it can achieve stepless dimming light. A long press touch, light intensity and gradually increase light levels when released after the release time parked in the corresponding brightness, if long time more than three seconds, the light intensity does not change the maximum brightness; press the touch again, light intensity decreases, stop light levels when released in the release time corresponding brightness, if long time more than three seconds, the light brightness to minimum brightness after no change
Of. So the cycle.

Debugging Tips

If you mistakenly triggered when debugging, or does not trigger, may cause the following reasons:

1. touch line too thick
2. Touch line is too long
3. copper is not big enough
4. close to the switching power supply terminal interference
5. Touch parameter C1 unreasonable

TI LED lighting control touch input corresponding to the output. There are four functions optional by the T1 and T2 input pin before power

State to decide. Details as follows:

• T1 = 1, T2 = 1 corresponds to: LED touch without sudden brightness memory sudden bright dark stepless dimming function
• T1 = 0, T2 = 1 corresponds to: LED touch without brightness memory slowly fades stepless dimming function
• T1 = 1, T2 = 0 corresponds to: LED touch with brightness memory slowly fades stepless dimming function
• T1 = 0, T2 = 0 corresponds to: LED three sections touch dimmer function

LED touch stepless dimming brightness memory without sudden bright sudden dark as follows:

On initial power-up, shut off the lights for the state.
Liang tapping the touch (touch duration is less than 550ms), it can achieve control lights off. One-click touch, lights; again tap the touch, light off. So the cycle. Light is on or shut off when no brightness buffer. The initial brightness and illumination lighting is fixed at 50% of full brightness.

Long press the touch (touch for longer than 550ms), it can achieve stepless dimming light. A long press touch, light intensity and gradually increase light levels when released after the release time parked in the corresponding brightness, if long time more than three seconds, the light intensity does not change the maximum brightness; press the touch again, light intensity decreases, stop light levels when released in the release time corresponding brightness, if long time more than three seconds, the light intensity has reached the minimum brightness does not change. So the cycle.

Click to touch and press the touch can feel free to use at any time, however, they function without interference and restrictions.
LED-based touch stepless dimming function LED touch without brightness memory slowly fades stepless dimming function is clear without sudden brightness memory on sudden dark, the lights and turn off the lights when you tap the touch, by making Lighting consists of a lower brightness slowly and smoothly transition to the initial brightness lights, touch lights when clicked, so that the light from the current brightness reduced slowly and smoothly until shut off, so as to achieve the brightness slowly changing visual cushioning effect, protect the eyes and vision Effect.
LED with brightness memory slowly fades the LED touch stepless dimming function is without brightness memory slowly fades touch base increased brightness memory function stepless dimming function on. That in the case of uninterruptible power supply, brightness, turn off the lights when touch each click will be remembered the next time the lights will click touch as brightness as the initial brightness. In case of power failure, the first power on again after one-click touch lights, the initial brightness is fixed at 50% of full brightness.

LED three sections touch dimmer function
On initial power-up, shut off the lights for the state.
CPC touch, the light intensity according to the brightness low brightness → → → high brightness turn off cycling.
Sensitivity adjustment

Adjust the touch sensitivity See table below:

Media Type: Directly touch the metal housing
Capacitance Type: Polyester capacitors
Capacitance parameters: (333) 0.033uF / 25V

Media Type: Within 3mm acrylic glass
Capacitance Type: Polyester capacitors
Capacitance parameters: (103) 0.01uF / 25V

Media Type: Within 3-6mm acrylic glass
Capacitance Type: Polyester capacitors
Capacitance parameters: (203) 0.02uF / 25V

Media Type: Within 6-10mm acrylic glass
Capacitance Type: Polyester capacitors
Capacitance parameters: (473) 0.047uF / 25V

Note: Constant output dimmer connected LED, resistor in series with the upper limit!

Value of the capacitor, the higher sensitivity; smaller values of capacitance, the lower the sensitivity.

Limiting resistor calculation: R = (Vi – Vled) / Io , Where, Vi is the input voltage, Vled is the total pressure drop of all LED lights, Io is the total current of light strings. You should consider the floating range Vi, Vled in the calculation. Usually when the battery is fully charged Vi will be too large. After the LED heat up, Vled will fall! Prevent excessive current damaging the module or lamp beads.