This article describes a simple voltage presence detector network 230 v/50 Hz.
Сигнализатор выполнен на двух генераторах (см. рисунок). Первый – генератор одиночных импульсов, второй – генератор звуковой частоты.
When applying the supply voltage happens charge con densatora C1. Through integrative chain R2S2 will talk, which will cause the voltage to rise to the level of open gas thyratron Bani TR1. As a result of the detachment of the tion thyratron charged capacitor C2 connection turns out to be received to rezistoru R5, which will form a pulse of voltage.
However, Kon densatora C1 through R3 at stour Resi VT1 move em the tension that will lead to the launch of the Rathor sound frequency. Pulse resistors through the resistor R4 and Mr VS1 goes to the base transistor VT1 that will lead to a breakdown in working those sound frequency generator.
Application of dinistora VS1 is because after passing through him digit current pulse capacitors satora C6 R6 formed a short time impulse which will establish clear boundaries in the run and disrupting who buzhdenija audio frequency generator.
In alarm deliberately used parts, have contained the majority of electricians-practitioners.
Так, динистор VS1 и конденсатор С1 взяты из схемы балласта ЛДС. Пьезоэлемент – трёхпроводный, из схемы звонка китайского телефона. Стабилитрон – любой маломощный на напряжение 24…36 В. Транзистор VT1 можно заменить любым n-p-n с максимально допустимым напряжением коллектор-эмиттер 50 О. Не рекомендуется приклеивать пьезоэлемент рабочей поверхностью к плате. Его следует закрепить по краям, не создавая механических преград для его работы.
Resistor R2, you can change the interval between Flash Kami thyratron and pauses in the audio signal, and frequency of sound signal based audio you can change the selection of the resistor R6.
Because there are high-impedance diagram elements for sustainable operation of generators, we recommend careful ducting wash with alcohol and dry charge after mounting elements.
Attention! Because the elements are galvanically connected with the detector 230 network 6/50 Hz, you must follow the safety regulations.
Author: Paul Gurovich, Beersheba
