Telephone control automatic lamp circuit 1

Posted on Mar 28, 2007

Automatic light is introduced by the telephone block system, the phone rang that night and asked the owner to pick up the handset or pull L, the lamp will light up; the phone s

Telephone control automatic lamp circuit 1

Click here to download the full size of the above Circuit.

topped (if no contact) or hang up after the delay l0-40s, lamp white line will be put out off. With this automatic lights at night to call people to ur convenience. In addition, dredging is also provided a light touch of a button, get up at night when the owner, just click keys. It can also lit handsome s. Automatic telephone lamp circuit lhl ~ 23-1, ignored the dotted line in the right part of the general lighting circuit, S for the light switch, closing 1. After s, the lights - this El} U riding small by ILi then screwed system; open S. Lights off, lights on the control by the telephone r. The imaginary line of the left portion of the telephone control section. VD7 a diode and a thyristor VT2 ~ VD10 composition control switch calling road, blocking diode VD6, regulator vs, capacitors (; constitute a simple resistor drop Ju Wensheng line, output of about 2 -IV blind galvanic twist for electrical control circuit. optocoupler 4N25, i photosensitive electrical resistor RI. and transistor VT1 composition telephone and electric light control path. a, b-side in series with the telephone line, when the series is not necessary to distinguish the positive and negative polarity, when hes not talking, among .h no current flows through the built-in light emitting diode emitting small 1N2 5, which corresponds photodiodes off, thats 4N20, feet off fairly small rise. VT1 deadline. goods ah tube VT2 off electric lamp E small light. at this time the circuit is in a standstill state, power consumption is minimal, less than found by imA, does not consume electricity that the town can. when a call button or enter the phone is off-hook dialing ah ask a current flow, stack light emitting diode within 4N2j, corresponding to the photodiode chip is turned on, pedicle pin output high. if during the day, quiet RI. irradiated with light low drought resistance, and wide cattle on low voltage (with respect to the product stare accounting), not enough to make VT] is turned on, so during the day, although a call, the lamp will not light up, only at night, RI. showed high resistance, high voltage share dichotoma above, it makes VT1 conduction, C storage of application, the Netherlands on by v ri, VD5 rapidly charge the f, cz charge to make the right voltage of about 20V celery Meanwhile, f;. also by R, to the inter-VT2 J cathode discharge, VT2 rapidly outside passage, lamp E lights up after the call is finished hang .al, no current flows between the cut-off but the South to resume .VT1 C. stored charge can lock continued through may. to VT2 provide f J current. therefore, VT2 still holding or pass state lamp still lights up to be so junction beam .VI, losing trigger current when the air flow through the electrical zero that is shut off, turn off the lights. SB button to turn on the lights to move, when you press the SB, ( j stored charge on the adoption of SB, R: to c charge electric and VI 2 pass, E lamp lights up which is similar to the ordinary principles of delay light phase and it is not room. inner light intensity control, you can always access key lights. VT2 should be 21/6i 6 5 to M ( RiOO-S deletion and other smaller one-way thyristor trigger current .RI. for the MG45 photosensitive resistor requires light resistance and dark resistance difference between the bigger the better, Note that when you install Yong let it receives natural light into the room, but not by its own direct exposure to light, otherwise the call will be turn on and off flicker, change the value of R can dig heir festival light sensitivity figure C, capacity achieve greater (] .U ~ eF) its date is that it has both double filtering and energy storage function, because the next phone call, VT2 or pass, VT2 drop voltage across that grid is no longer possible control circuitry, then rely on f. the slow release of the charging circuit can be maintained on as normal.

Leave Comment

characters left:

New Circuits

Zero consumption Anti-theft High power Code Switch for E-Bike Batteries

This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
Ultrasonic distance finder circuit

The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Simple Metal detector circuit with CD4030

Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Fully automatic watering circuit for flower pots

Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
Simple deep searching metal detector circuit

The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
Sub-Harmonic Bass Converter for Electric Guitars

The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
Echo Depth Sounding Sonar for Boats

In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
100W HiFi Audio Amplifier Circuit

This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
Plant-Pot Water Level Indicator Circuit

A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....

Create NOW your QR MENU for your Restaurant / Hotel / Bar / Caffe,

Comprehensive ordering/paying features. fully personalized to suit your Business.

Update Anytime! Easy and Simple!

Popular Circuits

Flashing LED unit

The circuit given here is designed as an LED flasher which produces a rotating effect when the...

Analog Filters for Data Conversion

the input signal is processed with an electronic low-pass filter to remove all frequencies above...

NiMH Charger For Up To Six Cells

The circuit presented here is intended for charging NiMH batteries. The MAX712 IC used here...

Interior lights

Interior lights come on when I enter the car, and most of the time do not go out while driving....

VLF Whistler Reception

Natural Radio" is simply radio noise with natural origins, mainly lightning, but also clouds of...

Single-chip audio power amplifier circuit

Burr-Brown OPA541 chip is produced by a power amplifier, which can by a maximum of 40V power...

Induction Balance Gold Metal Detector Circuit

This circuit really is the simplest inducer balancing metal detector (IB, Inductlon Balance) that...