Audio Amplifier 11 watt using TDA1554

This is a simple circuit. Just use a single IC, but the amplifier has 4 channels, 11 channels per watt, which is Philip IC TDA1554 number suitable for listening at home or in any vehicle. Just because the power supply 12-15 volt or will be used to expand any home theater sound system. The first 2-channel amplifier front speakers. And 2 to extend the back surround sound speakers also.

This circuit power supply 12 volts to 18 volts Power consumption at 5A. The input 4 input pins 1, 2, 17 and 18 is divided into a horizontal input inverter Ting 2 channels (Pin 1, 17). inverse model and input object 2 channels (pins 2, 6). That we can use that. To output phase to phase or did not return. The output will be the fourth slot on the leg 6, 8, 12, 10, with a C7-C10 serves to increase the low frequency stability better before you go to the speaker. The switch S1 acts on mute by pressing S1 will be closed sound system circuit in Mute, and if open circuit S1 standby ready to work. The C5 and C6 will filter light to smooth out and eliminate interference. Electronics Circuit Application

Switch-Mode DC-DC Converter Circuits.

This circuit is based on mobile phone chargers. These chargers are based on the Motorola MC34063 switchmode IC. By changing the values of the feedback resistors (R1 & R2), the output voltage can be varied over a wide range. Just modify R1 and R2 according to the formula: Vout = 1.25 (1+R2/R1). The values shown give an output of 3V.Electronics Circuit Application

Switch-mode DC-DC Converter Circuit Diagram

 Electronics Circuit Application

Bird Bath Fountain Monitor circuits

A bird bath fountain (a small shallow pond-created with a water-filled basin- in which birds may bath and from which they may drink) can be a garden ornament, small reflecting pool, outdoor sculpture, and part of creating a vital wildlife garden. It is an attraction for many different species of birds to visit gardens, especially during the summer and drought periods. This fountains that provide a reliable source of water year round add to the popularity and micro-habitat support. Presented here ia an “add-on” electronics circuit for bird water baths.

The circuit constantly monitor the water level in the bath, and brings up an audio&visual warning signal when its sensor probe notices that the water level is very low, or the bath is in dry state. It can be powered from any 9VDC adaptor or similar power source.
After construction, fit out the sensor probe inside the bird bath in an appropriate position and connect it to the remotely-located (usually inside the house) master circuit using high-quality twisted-pair/flat cable. The sensor probe can be constructed from a pair of new injection needles. The needles should be firmly fixed about 10 mm apart on a piece of laminated plastic sheet.

Working of this circuit is very simple! Here, a “gimmick” potential divider ( P1, R5 and the sensor probe J1) is wired at the base of transistor T1 (BC547) to switch it on when water is available between the needles of the sensor probe (J1). Conduction of T1 pulls down the reset terminal (pin 4) of the astable oscillator IC1 (LM555) and hence the astable is disabled in standby state. Potentiometer P1 (1M) sets the threshold level.
But when the sensor probe is dry, IC1 is enabled by R1 (4K7) and the piezo-buzzer (BZ1) starts beeping at near 3Hz rate. Red LED serves as a flaunting visual indicator. Electronics Circuit Application

MC34063 Switch-Mode DC-DC Converter

This circuit is based on mobile phone chargers. These chargers are based on the Motorola MC34063 switchmode IC. By changing the values of the feedback resistors (R1 & R2), the output voltage can be varied over a wide range. Just modify R1 and R2 according to the formula: Vout = 1.25 (1+R2/R1). The values shown give an output of 3V.

 

DC-DC Converter Circuit Diagram

Input voltage

 

Output voltage

Electronics Circuit Application

ZTE WP826A CDMA fixed wireless phone

ZTE WP826A CDMA fixed wireless phone Data Cable Connector Replacement
Electronics Circuit Application

Phone Broadcaster Circuits

Here is a simple yet very useful circuit which can be used to eavesdrop on a telephone conversation. The circuit can also be used as a wireless telephone amplifier. 

One important feature of this circuit is that the circuit derives its power directly from the active telephone lines, and thus avoids use of any external battery or other power supplies. This not only saves a lot of space but also money. It consumes very low current from telephone lines without disturbing its performance. The circuit is very tiny and can be built using a single-IC type veroboard that can be easily fitted inside a telephone connection box of 3.75 cm x 5 cm.

TDA2030 using Amplifier Circuits

This The multi-purpose Amplifier using TDA2030. It is have power 8 watt (RMS) at 8 ohm loudspeakers. It is have low noise be valuable THD (Total harmonic distortion) 0.1% , When friends use Power supply Voltage Source 28 Volt at 4 ohm loudspeakers have output power 12Watt. But be high class the noise increases to are 2 times. Besides still three be usable with Volt supply about 9Volt , but there is the electric power is down respectively. The VR1 use for Volume popularity level of sound signal. By if a friend can’t seek 22K values use 50K values can replace. For other detail about the integrated circuit TDA2030 IC and other , friends see in the circuit better yes.

 Electronics Circuit Application