Description: If the AC supply is 220 volts, which resistor should be replaced and with which one? Since 220V is twice that of 110V, the resistance value needs to be doubled accordingly. It is suggested to replace the 9.1kΩ resistor with a resistor in the range of 22kΩ to 100kΩ, and the capacitor voltage should be rated at 160V. The circuits being referenced are for a 120V, 4 LED light circuit.
The circuit in question operates under an AC supply of 220 volts, necessitating careful consideration of component ratings to ensure proper functionality and safety. The original design, intended for a 120-volt application, requires modifications to accommodate the increased voltage. The recommendation to replace the 9.1kΩ resistor with a resistor between 22kΩ and 100kΩ is based on the principle that resistance values should be adjusted in proportion to the voltage increase. This is critical to maintain the correct current flow through the circuit and prevent component failure.
Furthermore, the capacitor voltage rating must be at least 160 volts to withstand the peak voltage of the AC supply without risk of breakdown. It is advisable to select capacitors with a higher voltage rating for added reliability, especially in applications where voltage spikes may occur.
In the context of a 120V, 4 LED light circuit, each LED typically requires a forward voltage drop of around 2 to 3 volts, depending on the type of LED used. The series configuration of LEDs will dictate the total forward voltage drop, which must be accounted for when selecting resistors and capacitors. The total forward voltage drop of the LEDs must be subtracted from the supply voltage to determine the necessary resistor value to limit the current through the LEDs to a safe operating level.
In summary, when modifying a circuit designed for 120 volts to operate at 220 volts, it is essential to adjust the resistor values appropriately and ensure that all components are rated for the higher voltage to maintain circuit integrity and performance.If the ac supply is 220 volts, then which resistir should replace and by which one, 220v is twice of 110v so doubles the value due to the voltage work, try to replace 9k1 with 22k-100k and capasitor voltage 160v. You are reading the Circuits of 120 Volt 4 LED Light Circuit And this circuit permalink url it is
This circuit is used to slowly illuminate and fade a pair of red LEDs (light emitting diodes). The fading LEDs could be installed as 'eyes' in a small pumpkin or skull as a Halloween attraction, or mounted in a Christmas...
The circuit operates as follows: The LED is typically powered at a low brightness through resistors R1 and R3. SW1 functions as a spring and wire-based accelerometer. When SW1 is activated, capacitor C2 charges rapidly at a rate determined by...
High-energy capacitors can produce hundreds of amps when short-circuited, potentially causing severe burns, fires, and property damage. It is essential to be aware of these hazards when using such capacitors and to take precautions to avoid accidental short-circuits. The capacitor-powered...
The circuit utilizes an LM3914N bar graph display driver (IC1) to control up to ten LEDs. It is configured such that when 0V is applied to the input, only the first LED indicator lights up. This straightforward peak reading VU...
This circuit can be used to construct an attractive Christmas Star. When we switch on this circuit, the brightness of lamp L1 gradually increases. When it reaches the maximum brightness level, the brightness starts decreasing gradually. And when it reaches...
The LED traffic light circuit manages six LEDs (red, yellow, and green) for both north/south and east/west traffic directions. The timing sequence is produced using a CMOS 4017 decade counter in conjunction with a 555 timer. Outputs 1 through 4...
This simple linear circuit provides continuously variable regulated current (~25-400mA) from a 4-6 Volt source. The linear design is chosen for simplicity, reliability, ease of repair, and to avoid switching EMI in cave radios. The circuit requires only 0.2V headroom...
This easy-to-construct handy pen torch electronic circuit features a low component count and utilizes two power white LEDs for illumination. A low voltage (4.8V DC) supply is sourced from a built-in rechargeable Ni-Cd battery pack, which is converted into two...
BA6104 is a five-digit LED level meter driver integrated circuit (IC) that features a basic application circuit. The input stage employs a PNP transistor with a composite base input, resulting in high input impedance. The output stage is configured as...
We use cookies to enhance your experience, analyze traffic, and (if you allow) serve personalized ads.
By clicking Accept All, you agree to our use of cookies.
Learn more