Elderly lost alarm circuit


Posted on Nov 10, 2015

11A by the component and other components RMIB multivibrator, when the old man lost not more than a certain distance, the receiver output pin output low, the time-base integrat


Elderly lost alarm circuit
Click here to download the full size of the above Circuit.

ed circuit NE555 multivibrator composed of its reset terminal low level circuit not oscillate, the speaker does not sound. When between the transmitter and receiver distance exceeds the pick when closed Fan trouble, RCMIB of feet high output, multi-harmonic oscillator start-up, the speaker sound newspaper blind, elderly explanation beyond a set distance. This circuit simply adjust the RP, the speaker make different sounds. The circuit is also suitable for children, mentally handicapped people. The circuit elements less, only a few dollars can be.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Transistor Voltage buffer Follower
Variable Square wave oscilator with 555 circuit
Pwm-servo-amplifier
Rlc-oscillator
Low-power inverter using LM555 Timer IC
Heat Sensor
Fuzzy Urn
PIC16F630 14 Pin FLASH Based 8 Bit CMOS Microcontrollers
1999 S10 2.2L Fuse Box Quesion. There are two (what appear
PWM power controller
MEM 800
Magnetic Apogee Detection Sensor
Dual power switch circuit diagram consisting of a single control button CD4069
CF8865 module using dedicated switching power supply circuit diagram
Vented 2a3p 2a3pp-15w Tube Amplifier circuit diagram



Top