Electronic circuit kits

Today I want to introduce many electronic circuit Kits.Because I understand that sometimes you’re looking for a good electronic project easy creation and effective look below.

Cricket voice with buzzer using LM324

This is a cricket voice circuit which is an another Sound effects generator byLM324 op-amp and emit by a buzzer. And they have sound similarly the crickets are singing a couple we’ve ever heard. In circuit we don’t use any microcontroller ICs so you can build easily them and also cheaper. Technical information – Use power supply of 9 Vdc. – Maximum consumption current about 30 mA – PCB size : 2.25 x 1.57 in …

The 4 sound effect using UM3561

Here is a 4 sound effect that use one IC-UM3561 and a few parts only. It can make siren, Ambulance sirens, Police car sirens, Fire truck siren and Space Machine Gun Sound effect How it does works As Figure 1 is the circuit diagram. To begin with R1 is connected to pin 7 and pin 8 of IC1. Which are the OSC1 and OSC2 pins will controls frequency of the oscillator circuit inside IC1. If value of R1 lower will …

AM simplify radio with earphone

This AM simplify radio with earphone is a saving version that use a few parts, cheap , easy to build and Suitable to be assembled to study. Technical information Use power supply of 3 Vdc. Maximum consumption current about 45 mA PCB size : 2.38 x 1.24 inch. How does it work. A circuit diagram that shown in Figure 1 IC1 MK484 acts as receiver system by have variable capacitor and OSC coil as frequency adjust …

High power 6 LED Flashlight for 1.5V AA battery.

This circuit look like a torch by use on 1.5V battery only so it can be used. Since small so Easy to carry in various places. And also very bright as well. The technical information Power supply : one 1.5V AA battery. Maximum current used 200mA Uses 6 white LED. Small size PCB. How it works As usual, the LED light when voltage is 1.8V or 2V, We need a way to increase the voltage to rise,by the switching sup …

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LM386 audio amplifier circuit

This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW.
Which is sufficient to expand the sound from a sound about or the CD Walk Man out to the small speakers clearly.
When entering the power supply 9-volt circuit IC1 number LM386 amplifier IC size is 300-800 mW, Depending on the power supply circuit with,This is from 4-15 volts.

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50W Amplifier OCL with TIP33,TIP34

This is the power amplifier hifi ocl 50 watt, that I made with an all transistors. Because can reduce a noise signal very good, Natures sounds was helps to relax when listens for a long time and economical. Because the number of transistors old, inexpensive and easy to buy.
However, it also has some disadvantages that make it difficult when compared to the use of IC products.
From the circuit below. When we use a power supply +40 V and-40V will be about 50 watts RMS into 8-ohm speaker loads.

You can use the number of transistors used as BD249C, TIP33C, MJE3055, 2N3055 and BD250C, TIP34C, MJE2955, MJ2955 or a or Equivalent number.

This simple audio power amplifier was originally designed for a circuit board workshop, conducted by the OSU IEEE Student Group. At the workshop, 20 participants each constructed this amplifier, by etching and drilling the single sided circuit board, soldering all components, and attaching a pre-built heatsink assembly with the output transistors. Three workshops were held between 1995 to 1996. Though the design is simple, these amplifiers have impressive performance, with a frequency response to approx 40 kHz, very low noise, reasonably fast slew rate, and approx 50 watts (true RMS power) with the proper +/- 40 volt unregulated power supply.

Note: You can see other circuits about 50 watts amplifier below:

+ Power Amplifier OCL 50W by Mosfet (K1058 + J162)

+ Power Amplifier OCL 40W by 2N3055+MJ2955

+ The cheap 100 watt transistor power amplifier project

+ The main amplifier 50 watt OCL by LF351-2N3055-MJ2955 with PCB

Simple preamplifier circuits by transistors

If we want good quality sound system,the first thing to consider is that a good pre-amp.
Some people say that’s not necessary. But when the low-level audio source.
We may need to adjust the sound too high will cause distortion.
so should have the preamplifier to amplify a signal up before to the our power amplifier.

And I use transistors to build as small pre-amps because.

1. I am familiar with it than other devices. Even though the quality is good.
2. There are many to choose from build circuits.
3. Lower noise. Compared with ICs.
4. Cheap, easy to find accessories.
Seeing these advantages. Let’s consider circuits different example, I would suggest the following.

Read more and see circuits at source :www.eleccircuit.com/simple-preamplifier-circuits-by-transistors/

Musical Fidelity V-DAC MKII

The V-DAC is a sensational state-of-the-art DAC. By any measurement its performance is way beyond so-called state-of-the-art competition. In fact overall the technical performance of the V-DAC is probably about the best in the world regardless of price. There is no trickery here. It’s simply that we use state-of-the-art digital components (these are very expensive) and implement them with state-of-the-art circuitry and layout. The secret is simple; there’s no ridiculous packaging, and absolutely no wastage on anything. The V-DAC is rather like an F1 racing car. It is completely funcitonal with no excess flab or wastage anywhere. Read more