Automatic garden light circuit with LDR

Automatic garden light circuit scheme of an awful lot of his model, the source of power to the circuits there is a DC, there are AC and DC and there are enough of the AC source only. I discuss this because there was a friend who said that the garden lights that use a DC power source using the stone much less battery life is extremely inefficient. Because if the battery runs out rock circuit will not work again normally aliases stopped working because the resources run out. If you want to work again so we have to buy a new battery so adding jobs. Well this time I will discuss about Automatic garden light with LDR using FIR 3D and its resources only from AC current without any help of the battery. This circuit is quite popular and works very well.

 

A lot of people who like this circuit as it is so simply and cost are pretty cheap and the components are easily obtained. I think this tool is very useful to be used or applied in your home. And this circuit can save electricity in your home because you likely forgot to turn off the lights of the garden during the day or as you leave the House for a long time. Of course this tool is very helpful in saving your work as well. Happy coding!

LED light circuits with 220V AC without diodes

In previous posts I have given the scheme a series of Led lights with AC, now I give back with a series of simpler again. This series without wearing a rectifier at all just wear a current limiting resistor and a capacitor i.e., however it can work normally even very popular among lovers of electronics. In addition the price is inexpensive and long-lived, Led lights take just a small voltage. An awful lot of young people who are interested in this series and was trying to make. This circuit uses 24 Leds or about 15 Watt power supply with approximately 220 volts. The circuit is quite immune to the surge voltage so that it is reasonably safe when there is a change in voltage. The following is its schema:

 

 

To wear the white color Leds Super Bright so that the light is brighter. This led light sets can be made for indoor lighting, reading lights, lamps and other lighting use of pointers. The cost is cheaper than buying your Led lights already so that cost can be somewhat expensive. Happy work!

LED light circuits 220V AC

Generally a series of LED lamps using DC as the source, but this time I want to give a series of LED lights with AC as a source of energy. This series has not had a chance I alluded in previous postings, and this posting as well as a response from friends of friends who would love to know a series of LED lights by using air conditioning or electrical current flow directly without using a transformer. So the circuit more efficient and does not require much simpler components. Here is a picture of the series:
Basically this series still use DC current so his AC nonetheless must be made direct in advance. As the rectifier Diodes required in this D1 and capacitor C2. To reduce the current flow then the current delimiter is required in this case R1 as the limiting current of AC and DC currents delimiters as R2. To get maximum light output try using super bright LED lights.

List Of Components:
R1................ 110 K
R2................. 56 Ohm/2 Watt
C1................. 1uF 400V/Poly
C2................. 680uF/50V
D1................. 4 x IN4007
D2-D13 ... ... ... LEDS Super Bright

A series of LED lights it can disable you for example to Light sleep, reading lamps, lamps Lighting the room and could also be developed as a light hint: OPEN, Cashier, lamps home number, store name and others. Happy work!

Two Tones Siren Circuit

This Two Tones Siren Circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or Fire-brigade cars is generated, by the oscillation of IC1A and IC1B gates. With SW1 set to the other position, the old siren sound increasing in frequency and then slowly decreasing is reproduced, by pushing on P1 that starts oscillation in IC1C and IC1D. 

The loudspeaker, driven by Q1, should be of reasonable dimensions and well encased, in order to obtain a more realistic and louder output. Tone and period of the sound oscillations can be varied by changing the values of C1, C2, C5, C6 and/or associated resistors. No power switch is required: leave SW1 in the low position (old-type siren) and the circuit consumption will be negligible.

Two Tones Siren Circuit here:

Two Tones Siren Circuit figure

 

Parts of Two Tones Siren Circuit:

R1,R3___470K   1/4W Resistors
R2______680K   1/4W Resistor
R4_______82K   1/4W Resistor
R5______330K   1/4W Resistor
R6_______10K   1/4W Resistor
R7_______33K   1/4W Resistor
R8________3M3  1/4W Resistor

C1,C5_____10µF  25V Electrolytic Capacitors
C2,C6_____10nF  63V Polyester Capacitors
C3_______100nF  63V Polyester Capacitor
C4_______100µF  25V Electrolytic Capacitor

D1-D3___1N4148  75V 150mA Diodes

IC1_____4093   Quad 2 input Schmitt NAND Gate IC

Q1______BC337   45V 800mA NPN Transistor

P1______SPST Pushbutton

SW1_____DPDT Switch

SPKR____8 Ohm Loudspeaker

B1______6V Battery (4 AA 1.5V Cells in series)

Electronic Siren Circuits

An electronic siren made from discrete components. A push button switch is used to create the sound, which rises in pitch when the switch is pressed, and falls in pitch when the switch is released.

The Electronic Siren Circuits sound produced imitates the rise and fall of an American police siren. When first switched on the 10u capacitors is discharged and both transistors are off. When the push button switch is pressed to 10u capacitor will charge via the 22k resistor. This voltage is applied to the base of the BC108B which will turn on slowly. When the switch is released the capacitor will discharge via the 100k and 47k base resistors and the transistor will slowly turn off. The change in voltage alters the frequency of the siren. 

Electronic Siren Circuits Oscillators action is as follows. As the BC108B transistor switches on its collector voltage falls and so the 2N3702 transistor is switched on. This happens very quickly ( less than 1us). The 22n capacitor will charge very quickly as well. As this capacitor is connected between the collector of the 2N3702 and the base of the BC108B, it soon reaches almost full supply voltage. The charging current for the capacitor is then much reduced and the collector emitter voltage of the 2N3072 is therefore increased; the collector potential will fall. This change in voltage is passed through the 22n capacitor to the base of the BC108B causing it to come out of saturation slightly. Electronic Siren Circuits as this happens its collector voltage will rise and turn off the 2N3072 transistor more. This continues until both transistors are off. The 22n capacitor will then discharge via the 100k, 22k resistor, the closed push button switch, 9V battery, the speaker and 56 ohm resistor. The discharge time takes around 5-6msec. As soon as the 22n capacitor is discharged, the BC108B transistor will switch on again and the cycle repeats. The difference in voltage at the collector of the BC108B (caused by the charging 10u capacitor) causes the tone of the siren to change. As the 10u capacitor is charged, the tone of the siren will rise, and as it is discharged, it will fall. A 64 ohm loudspeaker may be used in place of the 8 ohm and 56 resistor, and the values of components may be altered to produce different sound effects.

Electronic Siren Circuits current drain is fairly high in this circuit so a suitable power supply is required. The duration the tone takes to rise and fall is determined by the 10u and 22k resistor. These values may be varied for different effects of Electronic Siren Circuits.

Electronic Siren Circuits  

 

Electronic Siren Circuits Figure