Relay Circuits
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This project is developed to control up to 50 solid state relays individually. The project is good learning material for students who which to expand the input output lines of microcontroller and want to control many devices. 2. The ON or OFF status of each.... -
Half of RL1 and RL2 manipulate the switching and the other is connected to an application. Relays are 200 ohms above ground and at one point are referenced to positive that turns them off. RL1 (which is off) applies plus voltage from its armature and latches.... -
This mains AC Relay module uses a 5V relays that can run straight off the Arduino and switch 230V, following the circuit on the arduino website here: relays. pdf I`ve built my own (very simple) evergy monitoring and control system (using Arduino 2009), using.... -
This SCADA controller is designed for use with distribution (13. 2kV/4. 8kV) substation transformer breaker positions where an automatic throw-over is present. The RTU voltage is 24V. DC. The breaker status and Lockout relays operate at 48V. DC... -
This is a simple ambit which I congenital to one of my audio amplifier projects to ascendancy the apostle achievement relay. The purpose of this ambit is to ascendancy the broadcast which turns on the apostle achievement broadcast in the audio amplifier. The.... -
This value can change due to the switching frequency, environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load. The upper limit of the ambient temperature is the maximum temperature that can.... -
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This circuit provides a visual 9 second delay using 10 LEDs before closing a 12 volt relay. When the displace about-face is closed, the 4017 decade adverse will be displace to the 0 calculation which illuminates the LED apprenticed from pin 3. The 555 timer.... -
Normally, home appliances are controlled by means of switches, sensors, etc. However, physical contact with switches may be dangerous if there is any shorting. The circuit described here requires no physical contact for operating the appliance. You just need.... -
This circuit will energize and de-energize a relay at the push of a button. Any type of momentary action push-to-make switch can be used. Pushing the button once - will energize the relay. And pushing it a second time - will de-energize the relay I`ve drawn.... -
We have modified the schematic diagram above with the addition of a 220uF smoothing capacitor between the base of transistor Q1 and ground. Without this capacitor, the relay chatter (relay switching on and off many times per second) was terrible around the.... -
Build the tiny stripboard relay shield for Arduino. View the circuit diagram and download the software. Control two relays from your PC and use your PC to switch things on and off.... -
This is same circuit as above with the addition of a photo resistor to trigger the flip flop instead of a push button. The bias resistor in series with photo resistor was chosen so that sufficient voltage is present at the base of the 2N3904 to supply.... -
This simple circuit shown int the schematic diagram actives the switch using sound. We can use this circuit for various applications, such as automatic (sound-controlled) disco light or car`s LED light show. The Q1 amplify the audio from mic. The R1 is used.... -
A photo or slightly activated relay normally open relay in the closed circuit / contact with the light. In this circuit, a photodiode is used to sense light. The photodiode has a high resistance in the absence of light strikes. The photodiode is connected to.... -
Today we would like to offers solutions for a set time for take control relay and take NO. / NC. contact to apply to control other devices. such as disable or enable the device. function of this circuit is using IC555 to determine the pulse and a resistor R1.... -
A relay is an isolated switch, there is no connection between the switching device and the connection. Relay is often used when controlling high voltage devices so that the intricate low voltage devices will not be damaged. There are many types of relays but.... -
Many integrated circuits have undocumented features or abilities. This is one of them. The TLC555 output (pin 3) can sink a 100mA load to 1. 28V. The open drain transistor reset (pin 7) can sink 100mA to 1V. Tying both lines together is permissible because.... -
A circuit that allows you to control a relay in response to sound from a non-amplified sound source (computer, CD player, or my Digital Sound Recorder board). This circuit accepts audio input from any non-amplified sound source and when the volume reaches a.... -
The 555 will activate a relay. When pins 2 and 6 are connected as an input, the chip requires only about 1uA to activate the output. This is equivalent to a gain of about 200, 000, 000 (200 million) and represents about 4 stages of amplification via.... -
This article means to utilize your old PC to be come a simple controller. Many old PC like 8088 type, 8086, 80286, 80386, or even 80486 already become an obsolete systems. This board using 8-bits of LPT printer parallel data port (DP) to activate the relays.....
New Circuits
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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.... -
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.... -
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.... -
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.... -
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.... -
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,.... -
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.... -
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.... -
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.....
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