How to make a homemade counter with resistor, capacitor, inductor, transistor, digital tube

<> this is a simple discrete component counter, but the output is not an LED digital tube, this is a glow digital tube, if you have a little electronic circuit foundation you can change it to LED, if you don't use a digital tube directly on the output end of 0 9 LED can also be displayed, which LED is bright is which number.

The circuit principle is very simple, that is, the triode bistable circuit is used to record the binary digits, and then the diode is used to decode to obtain the decimal number.

It's not impossible to assemble with these discrete components, but I'll tell you that if you make it with the kinds of components you mentioned, the board of this register would probably be the size of a bed, which is too cumbersome and completely unnecessary. To achieve the counting function, it can be done with a digital chip or with a microcontroller. If you don't know how to use a single-chip microcomputer, use a few digital integrated blocks to do addition counting, and output it to a digital tube decoder such as 74LS48 in the form of BCD code, and drive the digital tube.

It is simpler to use single-chip microcomputer counting circuit, and it can also easily realize the dynamic scanning display of multi-bit digital tubes, depending on how the program of single-chip microcomputer is designed.

Save on snacks! If you have a little bit of digital circuit foundation, you will understand that at least two transistors and other components are needed to store a binary 0 or 1 alone, and counters need a lot of data storage, decoding, and calculation, and at least tens of thousands or hundreds of thousands of resistors, capacitors, and inductance transistors. Modern technology can integrate these tens of thousands or hundreds of thousands of resistors, capacitors, and inductance transistors into a large-scale integrated circuit, only the size of a nail rod.

Hello: Digital tube counting needs to be designed with a counter, depending on what type you need to make.

The simplest pulse counting, you can use the common counter 74LS161 74LS series counter chip, after configuring the level of each pin, a pulse will be counted once, and then use the digital tube decoder to convert the binary data into the display data of the digital tube is OK.

It can be very complicated and troublesome, that is, to build a gate circuit

It's too hard, and the rewards aren't attractive enough.

Relying on resistors, capacitors, and inductors alone, you need at least tens of thousands to make them.

N transistors and other components of n inverters can be basically realized, it is recommended to use the SMD can reduce the volume, I hope to see your work in two years!

The resistor is R, the capacitance is C, the inductance is L, and the diode is D.

Printed circuit boards, also known as printed circuit boards, are providers of electrical connections for electronic components. It has been developed for more than 100 years; Its design is mainly layout design; The main advantage of using circuit boards is that they greatly reduce wiring and assembly errors, improve the level of automation and production labor rate.

According to the number of layers of the circuit board, it can be divided into single-sided, double-sided, four-layer board, six-layer board and other multi-layer circuit boards.

Since the printed circuit board is not a general end product, the definition of the name is slightly confusing, for example, the motherboard for personal computers is called the motherboard, but it cannot be directly called the circuit board, although the motherboard exists, but it is not the same, so the two are related to the same when evaluating the industry. Another example:

Because there are integrated circuit parts loaded on the circuit board, the news** calls it an IC board, but in essence it is not the same as a printed circuit board. When we talk about printed circuit boards, we usually mean bare boards – i.e., boards with no upper components.

Resistance r, capacitance c, inductance l, diode v

Resistance r

Capacitance c inductance l

Diodes v are commonly found in:

GND Grounding MIC MOSFET l Inductance r Resistance BS should be a model V voltage.

d is the diode.

A few more below:

R (resistor) FS (fuse).

RTH (Thermistor).

CY (Y capacitor: high voltage ceramic capacitor, safety specification).

CX (X capacitor: high voltage film capacitor, safety).

d (diode).

C (capacitor) Q (transistor).

ZD (Voltage Regulator Diode).

t (transformer).

U (IC chip).

J (jumper) VR (adjustable resistor).

Single-letter text symbol indicates:

1》Resistance (R).

2》Capacitance (c).

3》Inductance (L).

4》Diode (v).

5》Transistor (V).

Resistance (R) Capacitance (C).

Inductance (l) diode (d).

Transistor (Q).

RAM, ROM and other memories are used to store information, and information can be stored simply with resistors, capacitors, and inductors.

That's what it's like in integrated circuits.

Look at the colors and characters.

The middle part of the resistor is black with numbers printed on it (e.g., 102 is k, 473 is 47k, 391 is 390 ohms).

The capacitor is brown or beige gray with no words on it.

Most of the inductors are also black and parameterized.

Generally, the resistance is black, the capacitance is orange or gray, the inductance is a black head, and the color can be measured with a multimeter, and the resistance is blocked with a buzzer, and the resistance is the resistance, and the inductance is turned on (some resistances also sound, depending on whether there is a resistance value), and the resistance value is 1, which is the capacitor.

It is the most basic component of electronic circuits.