Simple Bass Booster Circuit

This is a circuit for bass booster that is powered by an ordinary 9 volt transistor radio battery. This is the figure of the circuit;

The design of a Bass Booster Circuit using LM390. The LM390 Power Audio Amplifier is optimized for 6V, 7.5V, and 9V operation into low impedance loads. The booster connects between your instrument and its amplifier through two standard RCA Jacks.

Simple TPS108x Versatile Boost Converter

This is a design circuit of the Versatile Boost Converter circuit using TPS108x. The TPS1081 has chosen because it is suitable for application that requires up to 20 V and 100 mA to drive each column of a passive-matrix OLED (PMOLED). The TPS61080 is suitable for application that requires less than 10 V and only tens of milliamps per column for the active-matrix OLED (AMOLED). This is the figure of the circuit;


The TPS61081 and TPS61080 require input voltages as low as 2.5 V and have adjustable outputs of up to 27 V. Current limit rating of the integrated power switches is the different of The TPS61081 and TPS61080 (typically 1.3 A and 0.5 A, respectively).

The TPS6108x boost converters have constant pulse-width-modulation (PWM) frequency and a traditional current-mode-control scheme for low-noise operation. Besides that, it has additional feature such as n adjustable reference voltage, high efficiency and redundant protection circuits—all of which make the TPS6108x ideal for boosting the 3.6-V Li-ion battery voltage used in most portable applications. The converter can also be used to power higher voltage application such as camera flashlights, OLED displays, WLED backlights and thin film-transistor (TFT) LCDs.

The switching frequency of the converter can be configured to 600 kHz for light-load efficiency or 1.2 MHz for smaller, external components. The 3 × 3-mm QFN package can enable an extremely small boost converter for a wide variety of applications because it has internal power switches, integrated feedback compensation and fast PWM switching. For example, a 24- or 12-V or industrial power rail from a 5-or 3.3-V bus.

[Circuit Source: Texas Instruments Application Note]

Simple AM FM Antenna Booster Circuit

This is design for antenna booster circuit. This circuit can be used to amplify the weak signal received by the antenna. This circuit is a simplest form of circuit. Antenna for AM/FM is usually not tuned for the optimal dimension of 1/4 wavelength, since we prefer small portable size. This un-tuned antenna has very low gain, so the antenna booster circuit here is very helpful in getting better signal reception. This is the figure of the circuit.


Use around 470uH coil for L1 if you use for AM frequency (700 KHz - 1.5 MHz) and use around 20uH for SW or FM receiver. For short wave performance, using this antenna booster, you’ll get a strong signal as we get from a 20-30 feet antenna, with only a standard 18″ telescopic antenna and this booster circuit. The power supply should be bypassed by a 47nF capacitor to ground, at a point that should be chosen as close as possible to L1.

Simple Voltage Booster Using Transistor

This is a design simple voltage booster circuit. This circuit is used for boosting 12 V DC to 24 V DC .The circuit is designed straight forward and uses few components. With few modifications the circuit can be used to boost any voltages. This circuit is work with based on operation of the transistor. This is the figure of the circuit.


The transistor Q1 and Q2 (D1616) essentially drives the primary of the transformer. The component values are not very specific here. We can use any NPN power transistors like D1616, 2N 3055, C2236, SL 100, etc for Q1 and Q2. The diode rectifies the output of transformer to obtain a 24V DC at the output load (here a fan). The diodes can be 1N 914 ones. The capacitors filter away noise and harmonics away from the output. For high current (around 5A) games use 2N 3055 transistor or more powerful Darlington pairs for Q1 and Q2. The transformer can be any center tapped 5A transformer with a 7:1 winding ratio. By experimenting on the transformer winding you can get different boost ratios.

Simple Voltage Booster Circuit

This is a simple circuit for boosting 12 V DC to 24 V DC. The circuit is designed straight forward and uses few components. With few modifications the circuit can be used to boost any voltages. This is a figure of the simple design circuit.


This operation of the circuit is based on the transistor Q1 and Q2 (D1616) essentially drives the primary of the transformer. The diode rectifies the output of transformer to obtain a 24V DC at the output load (here a fan).The capacitors filter away noise and harmonics away from the output. This circuit can operation with high voltage, if for high current (around 5A) games use 2N 3055 transistor or more powerful Darlington pairs for Q1 and Q2. The component values are not very specific here. We can use any NPN power transistors like D1616, 2N3055, C2236, SL100 etc for Q1 and Q2. The transformer can be any center tapped 5A transformer with a 7:1 winding ratio. The diodes can be 1N 914 ones.