Electronic grasshopper

Electronics / Sound and Acoustics

Added 10 comments

The grasshopper chirping simulator proposed by the author of Instructables under the nickname payam_sbr is made on two microcircuits: 556 and 555. The first of them is two 555 timers (KR1006VI1) in one case, so you can run homemade and on three single chips, only the board will have to be redone.

The master draws up a diagram consisting of three multivibrators that differ from each other in the values of the components. Each previous multivibrator controls the next, if you count them from the bottom up. The first sets the frequency of repetition of the packs, the second sets the frequency of repetition of tonal messages in a packet, and the third sets the tone frequency of these packages. The first multivibrator is connected to the second through an inverter on the transistor, the second to the third directly. The signal from the third multivibrator goes to the key power amplifier, and from it to the dynamic head. The key and dynamic head can be replaced with a ready-made module for Arduinocontaining the same components.

The signal generated by the simulator is shown schematically in the graph:

The wizard assembles the circuit on a breadboard type breadboard. Also suitable perfboard, volumetric, surface mounting, depending on your preferences and capabilities.

Then the master performs the same simulator of grasshopper sounds on a printed circuit board. First, design the board itself (source - here):

Then he makes a visualization with components, and most importantly - jumpers, so that when repeating it was clear where they are located:

And without them:

The master does not give a photo of the finished second version of the simulator.

In this video, the simulator in the first version (i.e., on the breadboard) is not configured correctly: the tonal sendings are too long, which makes it look not so much like a grasshopper as an alarm clock. It is easy to guess that reconfiguration requires the second of three generators.

August 4, 2019 10:13 +1

Reply To quote A complaint

he also received the cat's meow and nightingale trills, the grasshopper's chirping, helicopter propellers, and much more.

In childhood I went to the radio club. And then, somehow, I sat there and collected the "electronic nightingale", the circuit of which I found in the magazine. (Tolley Radio, or something like that ...) And it was necessary that at the moment when I, having collected all the elements for a fee, went to the LBP, a commission from RayONO came into the office, led by crimson from excitement school principal. She immediately started with me - here, they say, our excellent student, he goes to many circles (lied)))) Just two))). They asked what I collect, I replied that the "nightingale". After that, they began to ask the others ...
And I connected the power ...))))
... The wild cry of Tarzan, who tried to imitate a baboon drunk in a hollow, was replaced by the hoot of an owl, which was performed by a hoarse chicken! ))))
... Everyone turned to me ... "What is this?" ... I answer "This is a nightingale!"
“And what is it with him?” ... I answer “I don’t know. I caught a cold, probably!”))))
Laughing for a long time ....)))))
(It was in the early 80s ... In the Union. Later, when I was an adult, I worked for a year on the production of radio components, so I saw how they are distributed by quality: OTC divided them into three groups: Top grade - “for defense” , a little worse - "for export", and the slag itself - "the Union will go!")))). And so, what was given to the radio mugs and so on ... You understand yourself .. The error in the characteristics is / + half.))))). And therefore, it was necessary to configure everything for a very long time ...)))

August 4, 2019 07:42 AM +1

The idea of controlling one generator second, third ... the good thing is that you can get very real sounds. In childhood, on the basis of 3 multivibrators on transistors with different pulse frequencies and RC circuits between them, I also got cat meowing and nightingale trills, grasshopper chirping, helicopter screws, a lot of things. A special output amplifier was not required. An audio output transformer from the receiver and a speaker were connected to the collector of one of the multivibrators. The disadvantage of such sound simulators is the difficulty of tuning and how to repeat successful settings.

August 3, 2019 9:35 p.m. Author 0

He looked into the internal circuit 555. Indeed, an external resistor to pin 4 is not needed. You can just like that for a plus.

August 3, 2019 8:38 p.m. 0

We are not considering an abstract case of base control, but a specific IS NE555. Why do I need a resistor at pin 4?

August 3, 2019 2:11 p.m. Author 0

Base current limit.

August 2, 2019 11:14 p.m. 0

Why?

August 2, 2019 11:00 p.m. Author +1

If the base is in the air, pull up through the resistor.

August 2, 2019 10:40 PM 0

Just the fact that the base of the transistor there is "in the air" hangs. Standardly, if there is no control on the reset, it should be on the plus side of the power supply.

August 2, 2019 10:08 PM Author 0

Indeed, it is not a fact that it is pulled up from the inside up, it is better to be pulled up from the outside.

August 2, 2019 9:08 p.m. +2

For complete happiness on IC1, you need to pin 4 to power.

Electronic grasshopper

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