Invisible Broken Wire Detector

Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecti...

Mini Guitar/Bass Amplifier

  Comments: Tiny, portable Guitar Amplifiers are useful for practice on the go and in bedroom/living room environment. Usually, they can be...

Sound Modifier

  Comments: Compared to common Fuzz-box devices, the Sound Modifier circuit allows a choice amongst a wide variety of output waveforms, tha...

Cheap Pump Controller

This simple but effective circuit can be used to control water level in a container. The prototype is used to pump water out of a bucket tha...

Full-duplex Intercom

Comments: This design allows to operate two intercom stations leaving the operator free of using his/her hands in some other occupation, thu...

Speech Amplifier Box

Comments: This circuit is intended to be placed in the same box containing the loudspeaker, forming a compact microphone amplifier prim...

Non-Contact Power Monitor

Here is a simple non-contact AC power monitor for home appliances and laboratory equipment that should remain continuously switched-on. A ...

Circuit Board Tester

  Comments: This little circuit indicates the basic integrity of a printed board, detecting 0V, positive supply voltage from less than 3V t...

E-B-C Transistor Pin Identifier

  Circuit operation: A three-phase wave form is derived from the 350Hz ring-of-three oscillator formed by IC1A, IC1B and IC1C, and applied ...

Solid-state Fender Blackface Preamp

  Parts: P1,P2__________220K Linear Potentiometers (or 250K) P3______________10K Linear Potentiometer P4_______________1M Log. Potentiome...

Capacitive Sensor

  Circuit description: The purpose of this circuit is to animate shop-windows by means of a capacitive sensor placed behind a post-card-lik...

Mini Portable Guitar Amplifier

Comments: This small amplifier was intended to be used in conjunction with an electric guitar to do some low power monitoring, mainly for p...

Guitar Amplifier

Circuit description: The aim of this design was to reproduce a Combo amplifier of the type very common in the 'sixties and the 'sev...

Automatic water pump controller

Automatic water pump controller merupakan rangkaian berfungsi untuk mengontrol pompa air secara otamatis pada suatu reservoir atau penampung...

Adjustable regulated power supply LM317

  Regulated power supply, adjustable from 1.2 to 30V/1.5A using the ic lm317 use to substitute eliminator of piles and batteries in your cir...

Star Grounding Technique for Analog Circuits Minimize Noise in Audio Channels with Smart PCB Layout

Star Grounding Technique for Analog Circuits Minimize Noise in Audio Channels with Smart PCB Layout Ground plays the biggest role in determ...

LAN Tester circuit diagram

This LAN tester circuit originally designed by Vassilis Stergiopoulos. This LAN tester circuit optionally has two designs. The first design...

2×10 Band Stereo Graphic Equaliser circuit diagram

This circuit must be connected before the amplifier circuit. For maximum performance, you may use high quality electronic component such a...

Power audio amplifier with TDA 2030 for applications automotives 14 watts rms

TDA2030 is a circuit integrated monolithic in Pentawat® package, to be used as class audio amplifier AB. Typically he supplies up to 14 Watt...

Power audio Amplifier with TDA2030 2.1 Chanell – 3 x 18 Watts – Subwoofer – Complete With PCB and power supply

This circuit is a complete application is 2.1 amp, two satellite speakers for TDA and one for the subwoofer, making the 2.1 system, widely ...