Schematic Reference

The afterward diagram is 16W Bridge audio amplifier circuit. The ambit congenital based 2 pieces of ability IC LM383 in arch connection, so this amplifier is an arch amplifier.

The series of touch switch or touch switch is built by IC NE555, a series of touch switches can be used to turn on lights, alarms or other electronic equipment.
This circuit uses 2 pieces of metal plate media as touch, MP1 (Metal Plate 1) and MP2 (Metal Plate 2). Touch switch circuit is equipped with a visual LED indicator for relay status (load active). To enable (Relay ON) can be done by touching the surface of MP1 and to turn it off by touching the surface of the MP2. MP1 and MP2 in touch this switch can use a small piece of copper (diameter 5mm) was enough.

Touch Switch series with NE555.

The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V supplies. Using an 8 load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.

20 Watt Power Amplifier Circuit Diagram

The LM1875 design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels. Other outstanding features include high gain, fast slew rate and a wide power bandwidth, large output voltage swing, high current capability, and a very wide supply range. The amplifier is internally compensated and stable for gains of 10 or greater.

Features:
• Up to 30 watts output power
• AVO typically 90 dB
• Low distortion: 0.015%, 1 kHz, 20 W
• Wide power bandwidth: 70 kHz
• Protection for AC and DC short circuits to ground
• Thermal protection with parole circuit
• High current capability: 4A
• Wide supply range 16V-60V
• Internal output protection diodes
• 94 dB ripple rejection
• Plastic power package TO-220

This low power transceiver circuit project is designed using the ADF7242 fully integrated low-cost, short-range, low power transceiver designed for operation in the global 2.4 GHz ISM band.The receive path of the ADF7242 low power transceiver circuit is based on a zero-IF architecture enabling high blocking and selectivity performance. The transmit path is based on a direct closed loop VCO modulation scheme. The ADF7242 has a low consumption power that make it suitable for battery powered systems.

Low Power Transceiver Circuit diagram


The ADF7242 supports IEEE 802.15.4 compliant DSSS-OQPSK modulation with a bitrate of 250 kbps and also supports FSK and GFSK modulation with bitrates from 62.5 kbps to 2 Mbps.ADF7242 fully supports arbitrary data rates only for FSK mode of operation. The ADF7242 also has a built in battery monitor features that has a very low power consumption and may be used in parallel with any mode of operation, except SLEEP state. The battery monitor generates a battery alert interrupt for the MCU when the battery voltage drops below the programmed threshold voltage.

A very simple 4 channel video amplifier electronic circuit project can be designed using NJM2582 ic suitable for video applications with SCART connector . Models of the circuit is very simple and require few external electronic parts .

Simple 4 Channel Video Amplifier Circuit diagram

Some features of the NJM2582 are : Operating Voltage ±5V, +5V, +11V ; 6input 4output , 2input 1output Video SW , Internal LPF , 6dB Amplifier , Internal 75Ω Driver Circuit , DC output for SCART (FUNCTION SW, BLANKING) .

This white LED Driver circuit project is based on the NCP5680 high efficiency white LED Driver ic. NCP5680 supports double power flash LED and torch operation . The built-in DC/DC converter is based on a high efficient charge pump structure with 1X, 1.5X and 2X operating modes. The NCP5680 controller is designed to properly drives large external NMOS device with accurate control of the peak current flowing into the LED. Also, the NCP5680 chip includes Open Load and Overload Detection circuit to protect the system against faults at Vout or LED level.

High Efficiency White LED Driver Circuit diagram


Main features of the NCP5680 are : 2.7 to 5.5 V Input Voltage Range , Dual Power Flash LED Capability , Integrated Overload Protection , Selectable Flash/Torch Mode of Operation , Programmable SuperCAP Re−cycling Current , Capable to Share the DC Voltage to Supply Peripheral Circuits , Indicator LED Function , Integrated Photo Sense Function , Support Camera Strobe , Built−in Short Circuit Protection , Selectable Flash Time Out Safety Timing , Support External NMOS up to 10 A Load Capability , Fully I2C Protocol Compliant , Support GSM Synchronization , Built-in LED Test Function.

This 1w audio amplifier circuit is designed using NCP2830 audio IC manufactured by ON Semiconductor.This audio power amplifier ic designed for portable communication device applications and require few external electronic components.

1W Audio Amplifier Circuit using NCP2830 

NCP2830 is capable to provide 1W continuous output power in 8 ohms load.NCP2830 audio power amplifier main features are : high quality audio (THD+N = 0.04%) , low noise: SNR up to 100 dB, overall system efficiency optimization: up to 89% , Superior PSRR (−88 dB): Direct Connection to Battery , Very Low Quiescent Current 7 mA , Optimized PWM Output Stage: Filterless Capability , Selectable gain of 2 V/V or 4 V/V .

This circuit uses a sensor made of a small piece of circuit board and recorded a simple SCR circuit to detect rain and sound of a bell. The SCR could also be used to activate a relay, light a lamp, or send a signal to a security system.

2. Make sure to use a loud buzzer.

You can coordinate the LEDs D1 to D4 in impede in the field of order to find out of the ordinary effecs. The entire flashing led circuit is powered from a 9 volt battery and can happen built minute an adequate amount so it resolve fit in a matchbox.