Finally, I managed to create the LED lamp. The apartment lamp frequently suffered breakdowns in the area, resulting in voltage fluctuations from 230v at night to 240v occasionally. This posed a challenge for CFL lamps controlled by electronic circuits, as their quality didn’t match that of LED lamps. Despite using LEDs of moderate grade, specifically the 5th grade in the market, the performance was satisfactory for lighting up apartment floors adequately. I modified the FS-801 model, originally containing 38 LEDs, by replacing some materials and incorporating 50 LEDs instead.
I used a 470nF capacitor along with 50 LEDs, which resulted in a voltage of approximately 2.8V. I decided against using a 1uF capacitor without the second pole. Instead, I connected two 470nF capacitors in parallel, totaling around 950nF. I also connected a 1Mohm resistor in parallel with the capacitors. With an input of 220V and a 1-amp fuse added, the LED voltage dropped to 3.2V per LED.
The circuit I use
In fact, I have a formula for calculating the capacitor and resistor ( XC = 1 / 2pifC capacitance resistance, network frequency etc. ) but it exceeds me 🙂 I found the appropriate values.
Stabilizing grid voltage and recharging LEDs using passive elements can be unstable. There are various types of lamps made with different numbers of LEDs, such as 20 LEDs, 30 LEDs, 100 LEDs, and 150 LEDs.
I implemented the circuit in a rough manner, avoiding the use of a printed circuit board. Instead, I directly placed the LEDs on a perforated board. This method yielded better results.
I have a keen interest in the LED lighting business and aim to develop a more advanced system (SMPS) in the future. Additionally, I plan to assess the damaged lamp cases I have on hand.
Capacitive reactance, as defined, signifies the resistance offered by a capacitor to the alternating current flow within an AC circuit. A capacitor resists changes in the potential difference or voltage across its plates.
The formula for calculating capacitive reactance, denoted as XC, is as follows: XC = 1 / (2πfC), where XC represents capacitive reactance measured in ohms, π is approximately 3.14, f is the frequency, and C is the capacitance.