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Power Amplifier 45W Using uPC 1230 + Pre Amp Head uPC 1032
This is the circuit diagram of power amplifier 45W using power uPC 1230 as the main component. The pre amp head has been added in the circuit using uPC 1032. This is an popular old circuit for...
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Horn and Lamp Flasher Circuit for Car Reversing Gear Mode
The Horn Circuit This is a basic circuit of car horn and lamp flasher that starts playing the vehicle horn at whatever point your vehicle is backward rigging. The circuit (First Diagram) utilizes...
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Alarm Circuit for Drinking Water
This is the circuit diagram of drinking water alarm based a small water sensor by using aluminium foil and plastic foil, and connected to a very simple alarm based a 555 IC timer. Water Sensor and...
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200W MOSFET Amplifier based IRFP250N
Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are very cheap and easy to find in the electronic market in your area. The circuit has been assembled and tested with...
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300W RMS Stereo Power Amplifier based IC TDA7294
This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four pieces of power IC TDA7294. It’s mean that every single channel of the circuit uses two ICs in bridge mode. In...
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Stereo Tone Control with Line In + Microphone Mixer
This is an active stereo tone control circuit using very well known op-amp IC of TL072. The circuit include mic pre-amp and mixer control. In this design, we have two inputs: one for line (stereo),...
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100W Power Amplifier Based IC TDA7294
This is a very interesting circuit design to assemble. There are 4in1 amplifier module in a circuit board. 100W power amplifier using the TDA7294, for the VU meter uses IC LM3914. The tone control...
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120W Power Amplifier + Power Supply
This is 120W power amplifier schematic using TO-3 package complementary transistors, NPN and PNP polarity. The well-known power transistor pair of 2N3055 and MJ2955 used in this circuit. +/- 50V...
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Bass Guitar Preamp Pedal
Here is the circuit diagram and PCB design for relatively low cost DIY bass guitar preamp pedal uses FET K117 or equivalent. There is a bit difficult to build this kind circuit project, it’s require a...
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200W Power Amplifier Using Transistor
This is a 200W power amplifier circuit project. The circuit features high power, good definition and very low noise. It delivers about 200 watts in 4 ohms loudspeaker: a 4 ohm speaker or two pieces of...
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Small Sound Amplifier for Ears (Hearing Aid)
This is the simple project of small sound amplifier for ears or often called hearing aid device or hearing loss amplifier. This circuit was already tested on some patients and give significant...
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400W RMS Stereo Power Amplifier
This is the schematic diagram of 400W RMS stereo power amplifier which use power transistor to work. This amplifier in addition to providing good sound power, also with excellent quality and a high...
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Active Speaker Protector
This is a simple active speaker protector circuit which has a very important use, expecially to protect the loudspeakers of a audio system. It prevent the speaker from noise sound when we turn on the...
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Two Tone Train Horn based NE556 Dual Timer
This is the circuit diagram of two tones train horn which built based dual timer IC NE556. The circuit is quite simple and easy to built and of course inexpensive. The circuit diagram is in a “basic”...
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Triac, SCR, Transistor Tester
This is the circuit diagram of TRIAC, SCR and Transistor tester. This is a very simple circuit which can be used for testing of SCRs as well as triacs. The circuit could even be used for checking of...
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USB Printer Switch 2 Input Ports
Here is the USB printer switch circuit design with two USB input ports and one USB output port. This a really simple device that allow two computers (desktop/laptop) to select a single USB printer or...
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Simple Smoke Alarm using Photo Interrupter Module
This is a really simple smoke alarm circuit design. The circuit consists of two important modules that are sensor module using a photo interrupter module and alarm module using a tone generator IC...
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Digital Fan Speed Control
This is the digital fan speed control circuit design that can be utilize to control the speed of 220V fans using induction motor. The speed control is nonlinear, i.e. in steps. The current step number...
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250W RMS Power Amplifier Legend Stage Master
Here is the 250W RMS power amplifier circuit called Legend-Stage Master. This is the previous version of Legend-Stage Master MK2. The circuit is based on power MOSFET and give a great output...
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Unipolar Stepper Motor Driver
This is the circuit design of unipolar stepper motor driver to control unipolar stepper motors with 5, 6 or 8 wires. It uses four MOSFET IRFZ44. This circuit can be operated in free-standing or...
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