This is the circuit diagram of the simplest single chip AM radio. The circuit is designed around the IC ZN414Z which is a ten transistor tuned radio frequency receiver. The IC has only three leads and is available in the TO92 package. All necessary circuits required for an AM receiver (RF amplifier, detector and AGC are incorporated inside the IC)
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. In the circuit given below, capacitor C1 and resistor R1 forms the tank circuit which is essential for tuning. Capacitor C4 decouples DC from the output of the IC and C1 bye-passes the noise. Transistor Q1 and associated components forms a classic driver stage for the headphone. Head phone is connected across the resistor R5 and R4 gives necessary biasing for the transistor Q1. Just like in your Am receiver circuit, where you used a speaker as your out put. How do i replace that speaker with a relay so that i can you the circuit for another purpose EstarGa muy agradecido de ustedes si me hicieran el grande favor de informarme donde puedo conseguir en Colombia el Circuito Integrado: zn414z, quien lo distribuye, o en donde puedo encontrar esta informaciG²n, ya que estoy interezado en este circuito. Typing ZN414 radio or MK484 even TA7642 IC One can easily reach a source to buy two of above latter one`s via Google. Visiting my homepage and links list reflected on related pages above will direct You to a reliable eBay source that provides TA7642 at a very very reasonable cost. As already mentioned the receiver covers the AM/Medium Wave and LW Long Wave only. Although some try the Short Waves/SW possibly the 49 meter band. As the IC has a top working frequency of 3 MHz. Tha above or similar circuits will work fine with different number of turns according to the variable capacitor value. The coil can be prepared at home need...
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....
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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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