Here is a simple ANTI-THEFT ALARM AND HORN. It generates a loud alarm when there is an attempt of theft. When the intruder opens the door, the circuit senses the attempt of theft and after 2 minutes, the alarm will be activated. The time delay is provided to help the user to leave after arming...
Voltage On Bargraph Display
The LM3914 is a truly versatile component. Besides LEDs, only a few other components are needed to make the ‘bidirectional’ bargraph voltmeter shown here. The circuit is similar to a conventional bar display, but it offers a possibility to change the direction in which the LEDs are switched on....
Infra red Remote Control Tester
As I was developing my IR Extender Circuit, I needed to find a way of measuring the relative intensities of different Infra red light sources. This circuit is the result of my research. I have used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode...
DANCING FLOWER
This circuit was taken from a dancing flower. A motor at the bottom of the flower had a shaft up the stem and when the microphone detected music, the bent shaft created the flower wiggle and move. The circuit can reply to a whistle, music or noise....
Hydrophone Booster Amplifier HA2
The HP series Hydrophone Booster Amplifier (HA2) amplifies low-level hydrophone signals over a wide range of frequencies. It has a minimum gain of 25dB and an input and output impedance of 50Ω. The HA2 is designed for use with either Precision Acoustics membrane hydrophone or Precision Acoustics...
Railway Points Sequencer
Dedicated variation rail fanatics using sophisticated train and points controllers regularly have the drawback that as their formats get greater and more advanced, the transformer offering power to the points does not have sufficient present to change a couple of points at the comparable time....
Baud Rate Generator
In this text, an RC oscillator is used as a baud fee generator. If that you can be able to calibrate the frequency of such a circuit adequately competently (within a few percent) utilizing a frequency meter, it goes to work very neatly. However, it should smartly drift slightly after some time,...
4 Bit Analogue to Digital Converter
The operation of the converter is based on the weighted adding and transferring of the analogue input levels and the digital output levels. It consists of comparators and resistors. In theory, the number of bits is unlimited, but each bit needs a comparator and several coupling resistors. The diagram...
Battery Juicer
More and extra digital devices are portable and run off batteries. It is no surprise, then, that so many flat batteries find their way into the bin and frequently a lengthy way too early. When a collection of batteries can no longer run some tool as an example, a flashgun the cells will no lengthyer...
IC 555 Design Note
The popular Timer IC 555 is extensively used in short duration timing applications. IC 555 is a highly stable integrated circuit functioning as an accurate time delay generator and free running multivibrator. But one of the serious problem in 555 timer design is the false triggering of the...
10 W Audio Amplifier Rise
The energy provide vital for is eight - 18V DC at one Amp or more. Maximum output energy will only be got with a energy supply of better than 1A at sixteenV DC, and the usage of two ohm audio system (or two by means of four ohm audio system in parallel). However about 4W RMS can also be received with...
Smart Chocolate Block Schematic Diagram
What will additionally be completed, when two gentle bulbs in one gentle becoming are to be changeed one after the different, but only one swap circuit is available? Simple: construct a ‘smart chocolate block’ into the ceiling rose! The circuit is constructed from discrete parts and with a little bit...
Electrical Isolation For I2C Bus
When the SDA (Serial DAta) strains on both the left and right lines are 1, the circuit is quiescent and optoisolators IC1 and IC2 are typically not actuated. When the SDA line on the left change intos zero, current wafts throughout the LED in IC1 by means of R2. The SDA line on the proper is then...
Cranial Electrotherapy Stimulator
Current generated flows through clips placed on the earlobes Output current adjustable from 80 to 600 microAmperesOwing to the recent launching in Europe of Cranial Electrotherapy Stimulation (CES) portable sets, we have been "Electronically Stimulated" in designing a similar circuit for the...
1998 Gmc Jimmy Wiring Diagram
1998 Gmc Jimmy Wiring Diagram(click for full size image)The Part of 1998 Gmc Jimmy Wiring Diagram: power distribution, crankcase ground, sensor signal, tachometer, yellow wire, spark plugs, coll wire, distributor, coil assembly, elect spark, ignition positive voltasge, vehicle control module, IC control,...
Tuned Radio Frequency TRF Receiver
Superheterodyne receivers have been mass-produced since around 1924,
but for reasons of cost did not become successful until the 1930s.
Before the second world war other, simpler receiver technologies such as
the TRF receiver and the regenerative receiver were still widespread.
The circuit...
Timer Thermostat Circuit
Where Do The Rcd Timer Thermostat Go On The Circuit.Home Thermostat 1 Jpg.106 Honeywell Thermostat China 106 Honeywell Thermostat.Honeywell Pro 3000 4000 Thermostat.Wiring Diagram Plasterers Forum.Wiring Diagram And Other Informations For Example Thermostat Wiring.Wiring Diagram Thr 10 Thermostat...
Pump Controller For Solar Hot Water System
This circuit optimises the operation of a solar hot water system. When the water in the solar collector is hotter than the storage tank, the pump runs. The circuit comprises two LM335Z temperature sensors, a comparator and Mosfet. Sensor 1 connects to the solar collector panel while Sensor 2 connects...
