Archives: Projects

The voice echo or digital delay sound effects project presented here is suitable for applications such as Karaoke, multimedia, musical instrument effects, electronics toys, animatronics, etc. The project is based on PT2399 chip, with an operating supply of 5V DC, and approx. 30mA...

The project presented here is a differential line receiver that offers unparalleled high-speed, low-distortion performance and is ideally suited for digital, video, and RF signal-processing applications. These receivers offer a small-signal bandwidth of 550MHz and have a high slew...

The project presented here is an over-current trip switch. It provides protection to a load when over current condition occurs. Basically, the project trips the relay when there is a short circuit or the load starts drawing much current. When the condition is favorable, press the...

This is a compact size, mono, switch-mode (Class-D) audio power amplifier intended for multimedia and general-purpose high-power applications. It has greater than 87% efficiency and is capable of delivering 2W maximum continuous power to a 4Ω load. The project is designed to be...

The project described here is a high-performance, quad-channel digital isolator with a 5000VRMS isolation rating as per UL1577. The ISO7740 IC provides high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/O s. Each isolation...

This is an SPI Interface multichannel relay board for high voltage AC or low voltage DC loads. It is ideal for controlling LEDs lights, coffee machines, fans, pumps, or other high-voltage electrical appliances. The board also breaks out the SPI header, so controlling other boards is...

This project prevents/disconnects the load when an under-voltage condition occurs. The circuit latches the output when input sense voltage drops below the lockout threshold. Lockout threshold voltage can be adjusted using the onboard trimmer potentiometer PR1.  Tactile switch SW1 is...

This is an 8-pin SOIC/MSOP/SOT23-3/4/5/6 prototype board. This is a blank PCB that allows the operation of many chips from various manufacturers. Each device pin is connected to a pull-up resistor, a pull-down resistor, an in-line resistor, and a capacitor on VCC.  All pins are...