4 sound effect generator UM3561

This is a really simple sound effect generator based single sound generator chip UM3561. The UM3561 will generate four kinds of sound effects. The basic operation is that the UM3561 will generate the sound signal, then the signal delivered to 2N3706 (as speaker driver) to be amplified so you can Read more…


Electro Harmonix Fuzz Wah circuit diagram

This is the electro harmonix fuzz-wah guitar effect pedal circuit diagram. Circuit Notes: Q1 & Q2 are 2n3565 Fuzz bypass S1 has been improved to provide true bypass S3 chooses volume or wah-wah S5 provides for sweep reverse S2 gives just fuzz, just wah-wah / volume, or fuzz into wah-wah Read more…


small stone phaser effect

This is the schematic diagram of Electro-Harmonix Small Stone Phaser guitar effect pedal. The Small Stone is somewhat special in applying Operational Transconductance Amplifiers (OTA”s) for phase shift stages rather of opamps with variable resistors. All of the IC”s are house marked EH1048, but could be replaced with CA3094 that Read more…


5v to 12v dc boost converter

This is a 5VDC to 12VDC boost converter circuit built based LT1070. The LT1070/LT1071 are monolithic high power switching regulators. They can be operated in all standard switching configurations including buck, boost, flyback, forward,inverting and Cuk. A high current, high efficiency switch is included on the die along with all Read more…


120V or 240V Powered LEDs Circuit

You can easily activate the LED from home electrical power line with this circuit diagram. You just need to add a nonpolar capacitor and a 1Kohm / 1W metal oxide resistor to activate the LEDs from home power line with serial connection.


class-d power audio amplifier circuit based TDA8929T

The following diagram is the circuit diagram of Class-D audio power amplifier which built based on power chip TDA8929T. About TDA8929T: The power IC TDA8929T is the controller of a two-chip set for a high efficiency class-D audio power amplifier system. The system is divided into two chips: TDA8929T; the Read more…


50MHz 300W MOSFET Linear Amplifier Diagram

This MOSFET Linear Amplifier has capability to deliver up to 300W for 50MHz. The circuit built based the couple of MOSFET ARF448A and ARF448B. Circuit Design:


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