Train Horn

Train Horn Circuit Diagram based IC NE556. The circuit is quite simple and easy to built, also it is inexpensive. With this circuit design, it will not give high output power, so you need to add audio amplifier to make this train horn circuit louder. Imagine for a moment that you are driving down the road in your truck and it has been a long and d
Train Horn - schematic

ifficult day. All you want now is to make it home and get to sleep. As you are traveling down the highway you notice a car that is swerving for a moment and inside. This is an easy, low cost and easy built circuit of an electronic horn which is designed close to quadruple op-amp IC LM3900 (IC1). IC LM3900 has four independent operational-amplifiers (A1 through A4) having a large output voltage swing. It is able to operate at up to 32V DC. The 1st op-amp (A1) is designed. The following diagram is the schematic diagram fo Car Horn, you may try this circuit for your car modification. :) Components List: R1 = 68K R2 = 2K2 R3 = 56K R4 = 3K3 R5, R6 = 4K7 R7 = 10K Pot/trimpot C1, C2 = 22nF C3, C5 = 100nF C4 = 1nF C6 = 220 µF/25V IC1, IC2 =. Here the simple audio mic pre amplifier circuit based on single IC LM358. The circuit is very simple, inexpensive and easy to built. Component Parts List: R1, R3, R4 = 10K R2 = 1K R5 = 100K-1M Potensiometer C1 = 0. 1uF C2 = 4. 7uF/16V IC1 = LM358 dual op-amp single supply Mic = Electret Microphone. Below is a 80W amplifier circuit is constructed by using a power IC TDA7295. With a very simple design, makes this circuit very easy to build. TDA7295 has many features to support your audio system, the most important is that the IC has very low distortion and very low noise feature. Schematic diagram: PCB Layout:. This is the schematic diagram of DC motor speed controller circuit. The circuit...

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