This is a 220V LED flasher circuit which is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. This a low cost circuit and easy to built since it only use little amount of electronic components.. Schematic diagram: Component Parts: R1_________ 100K R2,R5______ 1K R3,R6______ 470R R4_________ 12K C1_________ 1000uF 25V… Read More »
The following scheme is a courtesy light circuit you can use to delay an electronic device to be disabled. For example, you can connect this circuit to the lamp in your room. When you turn off the lamp with a switch on the circuit, the lamp will remain lit in a certain period of time,… Read More »
Here is a simple and easy to build circuit diagram of a 12V car battery charger: Components List: R1 = 1Kohms D1 = 1N4001 T1 = 220V/17V 4A Transformer R2 = 1.2Kohms D2 = 6.8V 0.5W zener LD1 = Green LED R3 = 470 ohms TR1 = 4.7Kohms trimmer LD2 = Red LED R4 =… Read More »
Here’s the 3V lamp brightness controller circuit diagram used to control the brightness of the light bulb. You simply use the two AA or AAA battery to make this circuit works. Example usage of this circuit is to adjust the brightness of images for close-up photo shoot with a digital camera. IC1 works to generate 150Hz… Read More »
Below circuit design is a simple Hi-Fi 10W audio amplifier circuit based on TDA1910. This circuit will deliver 10W power output if used 8 ohm loudspeaker and powered with 24V DC supply. This circuit can be operated with voltage range of 8V – 30V DC, with recommended supply is 24VDC. Mount the TDA1910 on a… Read More »
Here the stereo power amplifier based on single IC STK4141II. This stereo amplifier circuit will deliver 25W audio power on each output channel. Recommended voltage is 27.5V for 8 ohms speaker and 24.5V for 4 ohms speaker while the maximum voltage to supply this circuit should be about 41 VDC. This circuit operated with dual… Read More »
This is the circuit diagram of stereo power audio amplifier using power IC LM4756. The IC have the capability to deliver dual output channel at 7W for each channel. Like the other audio amplifier circuits, this circuit just need a few external components to work. Circuit Application: PCB Design: This is the PCB design for… Read More »
This is a stereo power amplifier based on Samsung IC KA2211. With single chip, this circuit will deliver stereo output channel up to 5.8W on each output channel. The circuit can be supplied with general purpose power supply. KA2211 is a dual audio power amplifier for consumer application. It is designed for high power, low… Read More »
Here the 50W AF power amplifier circuit powered with single IC STK4036II. This circuit will deliver 50W single channel output. The amplifier circuit uses symmetrical (dual polarity) power suppy. Recommended power supply voltage is +/- 35VDC. Use heatsink to prevent overheating on the IC and maximize the STK4036II performance.