How to Make a Simple and Powerfull 12V to 230V Inverter Circuit Using Two MOSFETs

This is a simple and powerfull 12V to 230v inverter circuit. Here I have used 12V-0-12V 2A transformer, CD4047 IC and two IRF3205 MOSFET. For testing I have used 12V / 7Ah UPS battery and 40W/230V filament bulb.

If you have any questions please comment below. I'll answer as soon as possible.

See the video here :

5-Band Graphic Equalizer , Easy to Disign your own Frequency Band (6V to 12V Single Supply)

This circuit is a 5 band graphic equalizer for use in hi-fi audio systems. specially portable systems. you can make your own frequency band by changing C1 and C2 capacitor values in each band. use equetion given below to disign your own band.

Note : Use R1 and R2 as Ohms (Ω) and C1 and C2 as farads (F), then fo will be hertz (Hz).

Don't worry about R1 and R2 those are in-built  resistors in the IC. You can make your own resonance frequecy by setting C1 and C2.
In the following circuit, fo for each of 5 bands is set as follows :
fo=108Hz, 343kHz, 1.08kHz, 3.43kHz, 10.8kHz

Applications :
* Portable component stereos
* tape-recorders
* radio-cassette recorders
* car stereos

Five Band Graphic Equalizer With a Simple IC (3.5V to 16V Single Supply)

This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems.The BA3812L is a five-point graphic equalizer that has all the required functions integrated onto one IC. The IC is comprised of the five tone control circuits and input and output buffer amplifiers. The BA3812L features low distortion, low noise, and wide dynamic range, and is an ideal choice for Hi-Fi stereo applica-tions. It also has a wide operating voltage range (3.5V to 16V), which means that it can be adapted for use with most types of stereo equipment.

Applications :
Radio cassette players, home stereo systems and car stereo systems.

Simple Three band Equalizer (12V Dual Supply)

A Simple circuit for control low, mid and high frequencies of Power amplifier.

Twin-T Notch Filter

This is a Twin-T Notch Filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C.

>> Calculate the transfer function for Twin-T notch filter with R and C values

>> Calculate the R and C values for the Twin-T notch filter at a given frequency

Sallen-Key High-pass Filter

This is a Sallen-Key High-pass Filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C. use any Op Amp for assembling the circuit. I have given below some most common op amps pinouts for your convenience.

>>  Calculate the transfer function for Sallen-Key High-pass filter with R and C values

  >> Calculate the R and C values for the Sallen-Key High-pass filter at a given frequency

Note : Use R as Ohms (Ω) and C as farads (F), then Fc will be hertz (Hz).

See below for frequency response of above filter that designed for 20 KHz  cutoff frequency.

R1 = 8.2kΩ
R2 = 8.2kΩ
C1 = 1uF
C2 = 1uF

Cut-off frequency    fc = 19.4091394015 Hz  = 20Hz

Sallen-Key Low-pass Filter

This is a Sallen-Key Low-pass Filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C. use any Op Amp for assembling the circuit. I have given below some most common op amps pinouts for your convenience.

 

>>  Calculate the transfer function for Sallen-Key low-pass filter with R and C values

>> Calculate the R and C values for the Sallen-Key low-pass filter at a given frequency

Note : Use R as Ohms (Ω) and C as farads (F), then Fc will be hertz (Hz).

See below for frequency response of above filter that designed for 20 KHz  cutoff frequency.

R1 = 8.2kΩ
R2 = 8.2kΩ
C1 = 0.001uF
C2 = 0.001uF

Cut-off frequency    fc = 19409.1394015 Hz  = 20KHz

RC High-pass Filter

This is a RC High-pass filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C.

>> Calculate the transfer function for the filter with R and C values.
 

>> Calculate the R and C values for the filter at a given frequency.

Note : Use R as Ohms (Ω) and C as farads (F), then Fc will be hertz (Hz).

See below for frequency response of above filter that designed for 20Hz  cutoff frequency.

R = 8.2kΩ
C = 1uF

Cut-off frequency     fc =  19.4091394015 Hz  = 20 Hz

RC Low-pass Filter

This is a RC low-pass filter. Use this equations to calculate the Transfer Function for filter at a given frequency or values of R and C.

>> Calculate the transfer function for the filter with R and C values.

>> Calculate the R and C values for the filter at a given frequency.

Note : Use R as Ohms (Ω) and C as farads (F), then Fc will be hertz (Hz).

See below for frequency response of above filter that designed for 20KHz  cutoff frequency.

R = 820Ω
C = 0.01uF

Cut-off frequency     fc = 19409.1394015Hz  = 20KHz