Simple Schematic Collection

DIY Auto Burglary Alarm Circuit Diagram Using Reed Switch

noreply@blogger.com (prox) — Wed, 08 Nov 2017 09:28:00 +0000

Security alarms for your home, car and other properties is needed to protect and boost your property investment and a value for your insurance security.
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DIY Car Vehicle Security System Design Circuit Diagram

noreply@blogger.com (prox) — Sat, 04 Nov 2017 04:26:00 +0000

Protecting your vehicle, car stereo and other belongings inside the car are all excellent reasons to design and build your own basic vehicle security system.

DIY Home Security Monitor System Circuit Diagram

noreply@blogger.com (prox) — Fri, 03 Nov 2017 15:09:00 +0000

Home security systems is an idea basic principle of securing entry points, like doors and windows, computers, jewelery, dangerous item and others luxury collections as keeping it safe and secure is a top priority of many homeowners.

Converter circuit 12Vdc to 24Vdc

noreply@blogger.com (Anonymous) — Fri, 21 Apr 2017 21:34:00 +0000

This converter circuit shows a DC-DC converter that converting up 12Vdc source to a 24Vdc. It can be used to run radios, small lights, relays, horns and other 24V accessories from a 12V vehicle with a maximum draw of about 800mA.

12 volt NiCd battery charger design circuit diagram for your DIY

noreply@blogger.com (prox) — Fri, 17 Feb 2017 03:52:00 +0000

12 volt NiCd battery charger circuit diagram
This simple schematic shows how to design a 12 V Nicad (nickel cadmium) battery charger circuit by using 555 timer and 78L05 voltage regulator circuit.
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Circuit Diagram Automatic Headlight Schematic Board

noreply@blogger.com (prox) — Sun, 12 Feb 2017 09:48:00 +0000

Circuit Diagram Automatic Headlight Schematic Board

This circuit shows the timing capacitor C1 charges to 12 V and turns on transistor Q1, which drives power transistor Q2 into conduction.

555 Timer Circuit Diagram Police Siren

noreply@blogger.com (prox) — Mon, 06 Feb 2017 17:38:00 +0000

555 Timer Circuit Diagram Police Siren

This 555 timer police siren schematic diagram use 2 555 timer to produce an up-down wailing sound.

The first 555 is wired as a low-frequency oscillator to control the VOLTAGE CONTROL pin 5 of the second 555. The voltage shift on pin 5 causes the frequency of the second oscillator to rise and fall.

24 volt dc power supply circuit diagram schematic

noreply@blogger.com (prox) — Sat, 04 Feb 2017 14:26:00 +0000

24 volt dc power supply circuit diagram schematic

This circuit shows how to build your own 24 vdc power supply with 2 A (ampere) current. The transformer of TR1 lowering the voltage of 230V with 24V secondary voltage on a transformer.

Schematic - Simple Mini stereo amplifier circuit diagram

noreply@blogger.com (prox) — Sat, 04 Feb 2017 06:11:00 +0000

Schematic - Simple Mini stereo amplifier circuit diagram
This circuit shown a simple build up schematic for basic mini stereo amplifier circuit which is based on MC1458 dual op amp and LM378 dual audio 4-watt amplifier.

Datasheet: Transistor Family Electronics Component

noreply@blogger.com (prox) — Sat, 04 Feb 2017 05:40:00 +0000

Datasheet: Transistor Family Electronics Component Read more »

Video Amplifier Simple Circuit Diagram with op-amp

noreply@blogger.com (prox) — Fri, 20 Jan 2017 09:19:00 +0000

Video Amplifier Simple Circuit Diagram with op-amp

Audio (power amp) and video amplifier in an electronic amplifier that strengthens low-power signal to a desired level for many audio video electronic devices.

Simple Oscillator schematic Basic Transistor Circuit Diagram

noreply@blogger.com (prox) — Wed, 04 Jan 2017 04:08:00 +0000

Simple Oscillator schematic Basic Transistor Circuit Diagram

This circuit diagram shows a basic diagram of an oscillator that operates by using two transistors.

H Bridge Theory Design Application Basic Concept

noreply@blogger.com (prox) — Sat, 17 Dec 2016 09:22:00 +0000

H Bridge Theory Design Application Basic Concept

An H- bridge is an electronic circuit schematic that are often used in robotics, machine, cnc, factory, automotive industry and other applications to allow DC motors to run backwards or foward and controlled the motor.

The structure of the h-bridge will enables a voltage to be applied across a load in bi-direction ways and it’s very usefull to be used with a microcontroller project circuit.

Most of H-bridge are used in power electronics circuit, DC-to-DC push–pull converter, AC to AC converters, DC-to-AC converters, motor controllers, and power inverters.

Bipolar stepper motor is also driven by a motor controller containing with two H bridges.

PWM Pulse Width Modulation Simple Circuits Diagram

noreply@blogger.com (prox) — Thu, 15 Dec 2016 16:31:00 +0000

PWM Controller Pulse Width Modulation Simple Circuits Diagram

This circuit shows a PWM Controller schematic diagram.

Complementary half-H peripheral drivers SN75603 and SN75604 with outputs rated at 40 V and 2.0 A. Capacitor C1 is charged linearly with a constant current of 1 mA from the 1N5297, which is an FET current-regulator diode.

These drivers has the ability to provide bidirectional control which will place the motor in a full-bridge configuration. Motor speed is controlled by feeding a dc voltage of 0 to 10 V to control input pin 5 of U2. As the control voltage increases, the width of the output pulse pin 3 also increases. These pulses control the on/off time of the two motor drivers.

Timer U1 operates in the astable mode at a frequency of 80 Hz. The 100-Ω discharge resistor results in an 8-μs trigger pulse which is coupm led to the trigger input of timer U2. Timer U2 serves as the PWM generator. The trigger pulse width of timer U1 limits the minimum possible duty cycle from U2.

Auto Switching Power Supply Circuits Schematic

noreply@blogger.com (prox) — Thu, 08 Dec 2016 04:55:00 +0000

Auto Switching Power Supply Circuits Schematic

This video shows a schematic of self switching power supply to be used as a part of schematic design.This power supply schematic gives a switches off in no load condition and a variable regulated supply.

BC548 NPN Datasheet and Specifications

noreply@blogger.com (prox) — Mon, 28 Nov 2016 18:38:00 +0000

The BC548 is a NPN bipolar junction transistor general-purpose commonly used in designs in hobby electronics magazines where a general-purpose transistor is required.

It is low in cost and widely available.

DOWNLOAD DATASHEET BC548

Simple circuit of Flashing Dancing LED Light Citcuit Diagram

noreply@blogger.com (prox) — Mon, 28 Nov 2016 17:58:00 +0000

Simple circuit of Flashing Dancing LED Light Citcuit Diagram
This schematic shows a simple flashing dancing led circuit for multipurpose use such as decoration, signboard or aplication indicator.
The speed of LEDs can be adjusted and various dancing patterns of lights can be formed.

The circuit consists of two astable multivibrators which is one multivibrator is formed by transistors T1 and T2 while the other astable multivibrator is formed by T3 and T4. Duty cycle of each multivibrator can be varied by changing RC time constant by using potentiometers VR1 and VR2 to produce different dancing pattern of LEDs.
Flashing LED Circuit Main Component
T1 – T4 = BC548
R1 – R4 = 100ohm
R5 – R8 = 33kohm

Simple Circuit Peak Audio Level Meter Diagram

noreply@blogger.com (prox) — Mon, 28 Nov 2016 05:38:00 +0000

This simple schematic diagram shows how to build a circuit that will indicate peak audio response on an analogue meter, similar to a tape recorders meter.

This peak level reading audio meter circuit diagram will only work with a MOSFET type op-amp, bipolar types i.e. 741 and J-FET. The LF351 op-amps will not work in this circuit.
The circuit also has a slow decay time and fast response time to indicate peak of the meter readings. The 1N4148 diode provides half wave rectification of the input signal, the dc output being smoothed by the 22u capacitor.
The capacitor will charge to the peak value of the input waveform, and then discharge via the meter and 18k resistor.

Simple alkaline battery charger schematic circuit

noreply@blogger.com (prox) — Thu, 10 Nov 2016 14:40:00 +0000

Simple alkaline battery charger schematic circuit

This simple schematic circuit was designed by Domenico Di Mario from Italy. It’s specifically designed to recharge an alkaline cells.

This circuit schematic diagram can be used with all types of alkaline cells. For AA cell it can take up to one day discharged can be recharged: it will take 1 day for a discharged AA cell or 9 V battery and up to several days for a large D type cell.

The orange LED will blink for around 5 times a second for a 1.37 V cell.

For a totally discharged cell, the blinking is faster but it will decrease until it will come to a stop when the cell is charged

To use high beta transistors such as BC337-25 or better BC337-40.

Pre Amp Schematic Hi Fi Circuit Diagram

noreply@blogger.com (prox) — Mon, 05 Sep 2016 12:10:00 +0000

Pre Amp Schematic Hi Fi Circuit Diagram

Circuit Schematic Diagram Door Phone Intercom

noreply@blogger.com (prox) — Mon, 29 Aug 2016 07:50:00 +0000

Circuit Schematic Diagram Door Phone Intercom

This schematic shows a doorphone circuit diagram

Schematic Circuit for Microphone Computer

noreply@blogger.com (prox) — Mon, 29 Aug 2016 07:38:00 +0000

Schematic Circuit for Microphone Computer

This circuit schematic was designed by Lazar Pancic from Yugoslavia.

Schematic circuit diagram for 6 Input Mixer

noreply@blogger.com (prox) — Sun, 28 Aug 2016 08:24:00 +0000

Schematic circuit diagram for 6 Input Mixer

This schematic circuit diagram shows the mixer circuit that has 3 line inputs and 3 mic inputs.

Schematic Circuit Diagram Audio Notch Meter

noreply@blogger.com (prox) — Sun, 28 Aug 2016 06:51:00 +0000

Schematic Circuit Diagram Audio Notch Meter

This schematic circuit diagram shows a notch meter for your audio device.

Schematic Circuits for 8 Watt Amplifier

noreply@blogger.com (prox) — Sat, 27 Aug 2016 01:13:00 +0000

Schematic Circuits for 8 Watt Amplifier

In this 8 watt amplifier circuits,