Secret Diagram

Protect your home appliances from voltage spikes with this simple time delay circuit. Whenever power to the appliances is switched on or resumes after mains failure, the oscillator starts oscillating and D5 blinks. This continues for three minutes. After that, Q14 output of IC CD4060 goes high to trigger the gate of the SCR through D4. At this moment, [...]

Following is the protect circuit Samsung TV which use IC LA76931 as basic working the protect circuit. This Protect Circuit LA76891 located at pin-30 whichconnected to the collector of transistor Q902.In normal conditions the voltage at the base of Q902 is "low" and the voltage at pin-30 is "high". For the temporary crippling protect, it [...]

This is Vice Control Music Outlet circuit using SL517A, this electronic circuit project build a very easy. The circuit is shown in Figure, and it is composed of acoustic sensor, voice control IC, relay control circuit, song voice circuit and AC buck rectifier circuit.Vice Control Music Outlet Circuit using SL517A:Voice control IC uses SL517A which [...]

Here is a simple power supply circuit that can be used for citizen-band and VHF walkie-talkies of power rating up to 10 watts. The circuit uses a step-down transformer, followed by bridge rectifier, filter, regulator, and current booster stages.A pnp power transistor is added to the circuit to increase its current sourcing capabilities. Regulator 7812 [...]

It is a relatively simple circuit of electronic lock of safety with code of 7 digits. It should is given attention in the time that will be stepped the keys, that shape code and it does not exist it delays. With the right step of keys and if code is right then is activated exit Q7 for roughly 4 seconds, driving the transistor Q2, which with the line [...]

Here is a small and super inverter circuit project. This circuit can be used to power a small strobe or fluorescent lamp. It will generate over 400 VDC from a 12 VDC, 2.5 A power supply or an auto or marine battery. While size, weight, and efficiency are nothing to write home about - in fact, they are quite pitiful - all components are readily available [...]

Virtual cell phone battery is a replacement cell phone batteries for those of you who use the phone as a modem. Including myself, who use the phone as a modem HAIER d1200p internet.  Why must use this virtual battery. For those who surf hobby "full time" with a phone modem, would know the problem, the battery gets hot and fast reply wasteful even [...]

This is a simple and small roulette circuit, whilst the switch S1 the output by pin 1 of the IC1a the voltage is “shrill”,The oscillator circuit output IC2b, IC2c go to work.timer pulse generator fed to IC3, a voltage “high” output to the output pins 3, 11, and pin 12 of the IC3, the LED1-LED10 light trail sequence. Section LED11 extravaganza high [...]

The First ac voltage from tranformator will be rectified and filtered to the LM723 voltage regulator and the NPN pass transistors setup for constant current supply. The 470 Ohm resistor is limit trickle current the momentary pushbutton (S2) is depressed, the SCR turn  on , and the current flows through previously determined resistor  network.SCR [...]

This circuit arose from the need of the author to provide a 5 V output from the 24 V battery of a solar powered genera-tor. Although solar power is essentially free it is important not to be wasteful especially for small installations; if the battery runs flat at midnight you’ve got a long wait before the sun comes up again. The basic requirement was [...]

Here is an energy saving solar inverter battery charger. It harvests solar energy to replenish 12 volt inverter battery. It has auto cut off facility to stop charging when the battery attains full charge. The charger uses a 24 volt solar panel as input.The circuit uses a variable voltage regulator IC LM 317 to set the output voltage steady around 16 [...]

The below Simple Timer with Transistor Circuit Diagram is a simple timer that uses only two Darlington transistors and a capacitor base to generate a delay. When SW1 is pressed, the timer starts, the time setting is set by VR1. The duration of the timer is given by the values ​​of the potentiometer VR1 and the capacitor C1 that this circuit is 220 [...]

Here is a project for locking and unlocking with a tilt sensor by tilting it in a defined sequence. It uses an accelerometer module to detect the tilt motion. If the sequence matches with the predefined motion sequence, the lock opens. You can build this lock for a briefcase, ballot box, portable cashbox or even as a door-lock using suitable mechanical [...]

TDA7384 - 4 x 22W car power amplifierIf connect to car battery where operating voltage is about 13.2V, then each channel can give 22W(4Ω) – what is more than enough for me. This amplifier I probably will use to test audio processor TDA7313 which is stil in development phase.I didn’t find much information about this chip on the internet so I decided [...]

Doubler Digital Frequency circuit includes a simple and easy to understand. Digital Frequency Doubler circuit application contained in the system electronics such as audio-producing organ, or keyboard. The function of this series Digital Frequency Doubler for multiplying two input frequencies.The process of multiplying 2 on scales in an organ in principle [...]

Hi Friends, Here i want share with you a tutorial on how to establish Communication between Mitsubishi FX3U PLC and Elipse SCADA via RS485 BD  The required Items for the setup is as follows Sr. no. Material 1 PLC Type : FX Series 2 CPU      : FX3U 3 Module   : FX3U RS485BD 4 SCADA Make : Elipse 5 SCADA [...]

Wow this is nice intregated amplifier circuit , because this IC can be power output up to 60 Watt . With minimum require voltage 8 V , and maximum voltage 35 V . But this circuit is'nt so good to working on car , because output sound is very loud but not smooth. Amplifier so good working on full range , with speaker full range 100W and impedance 8 [...]

 A fluorescent lamp or else fluorescent tube is a gab-discharge lamp with the aim of uses electricity to excite mercury vapor. The excited mercury atoms bring into being squat-wave ultraviolet light to facilitate subsequently causes a phosphor to fluoresce, producing visible light. The following schematic shows a easy 6V Fluorescent Light Circuit [...]

35W 4-Channel Amplifier for car audioDatasheet for AN7555NZ: Downl [...]

MP3 Car Amplifier Schematic Circuits 150W These accessories are low cost, aerial speed, bifold JFET ascribe operational amplifiers with an internally akin ascribe account voltage (BI-FET II technology). They crave low accumulation accepted yet advance a ample accretion bandage amplitude artefact and fast bulk rate. In addition, able-bodied akin aerial [...]

This solar LED lantern can be used as an emergency light. Its 6V battery can be charged either from 230V, 50Hz AC mains or a 12V, 10W solar panel. Two LED indicators have been provided—red LED (LED1) indicates battery charging and green LED (LED2) indicates fully-charged battery.Solar LED Lantern Circuit DiagramYou can choose to charge the battery [...]

How do you decide which auto sound system is best for you? This is a question that many consumers ask in the U. S. each and every day. The truth is that only you can decide what kind of sound you find enjoyable and what you are seeking in the sound system you will ultimately purchase. A good sound system will greatly improve how you feel about not [...]

20 Watts Power Amplifier circuit can be made ​​with an IC power amplifier LM1875. IC LM1875 is a single chip power amplifier from National. 20 watts audio amplifier with LM1875 is a low power amplifier with good quality to the room. To assemble the amplifier 20 watts with IC LM1875 component is not needed much support. 20 watts power amplifier using [...]

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This circuit was designed to ‘baby-sit’ SLA (sealed lead-acid or ‘gel’) batteries using freely available solar power. SLA batteries suffer from relatively high internal energy loss which is not normally a problem until you go on holidays and disconnect them from their trickle current charger. In some cases, the absence of trickle charging current may [...]

zBot :10-A Power Stage for DC Motor Circuit Diagram . If you look at the chassis of the zBot vehicle1, you’ll find two parts requiring intelligent control: the steering servo and the DC motor. The so called H-bridge is the normal circuit for electronic control of revolution speed and direction. The DC motor of a Tamiya car is powerful enough to propel [...]

Today we're going to do a quick run through of how to make a guitar cable. It’s a pretty simple procedure, but if you’ve never made one before, it can be a little bit daunting at first.To make a cable, you will need to following items:Some cable Two ¼” jack plugsAnd the following tools:A soldering iron and some solderWire cutters/strippers/pliers Here’s [...]