I succeeded in making a clock using an ESP8266 and a 7-segment display. I removed the original 7-segment display and replaced it with a 5V LED to function similarly to the original display. Like in the Photo:
I am trying to boost the LEDs, to be brighter, so i bought this Converter Module: and connected to test if it is going to be brighter, but it is the same brightness!
I cannot figure out what can i do to make it brighter?
Not enough information. Post a link to the data sheet for the display, schematic diagram of the boost converter or link to the product page, measured voltages, etc.
That is a start!
Do obey (stay under) the maximum voltage and current ratings in the TM1637 data sheet.
Send me a link of the datasheet if you have, please!
So, the voltage of the LEDs display is less than 3v?
Should i put a 0.1 volts to 5 volts converter?
please help
LEDs are current driven, not voltage driven, so the brightness depends on the current. The supply voltage must be above the minimum required by the LED display.
Post a link to the actual display.
That is a photo, not a link to the display or display data sheet.
Can you help? Please. thanks!!
Most TM16xx chips are intended to be connected directly to LEDs that match the power specification of that chips. To a certain limit you can connect the chip on the module to different type of LEDs that are brighter and perhaps consume a bit more power than the 4-digit LED display on the module. Some years ago I experimented with theses modules and modded one into a LED&KEY module and another one into a 6x5 mini LED matrix module.
To use the TM1637 at it's highest output you should power it by 5V and not by the 3.3v that the ESP8266 uses. Perhaps best is to use a separate power supply and share common GND connection. The ESP8266 has 5V tolerant data pins, so that should be fine.
If you want to drive the LEDs at even more power, you cannot just use a boost converter. You need to make the TM1637 switch higher currents instead of driving the LEDs directly.
Although I haven't tried something like that myself yet, I did find some ideas in the TM1680 datasheet (pages 11-13 of the TM1680 datasheet v1.1). There they show three different circuits: for low, medium and high power usage.
The low power circuit drives the LEDs directly, just like your TM1637 module. The medium and high power circuits use the chip to switch intermediate transistors on the cathode or anode side, or on both. I'm not sure if such circuit can be applied directly to the TM1637, but perhaps it's worth doing some experimenting.
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