念慈菴

Multi-waveform generator made using LMV324 and 74HC74D

Overview

This is a multi-waveform generator made using LMV324 and 74HC74D. It can output high-frequency and low-frequency square waves, triangle waves, and sine waves. Project function: After the circuit is powered on the left DC interface or USB interface, the pins will output high respectively. Frequency square wave, low frequency square wave, triangle wave, sine wave signal. At this time, the frequency, integration speed, triangle wave DC component size and sine wave amplitude can be adjusted respectively through the four precision potentiometers on the board. Among them, the high frequency square wave The wave is obtained by the operational amplifier hysteresis comparator. The low-frequency square wave is obtained by dividing the high-frequency square wave by four by 74HC74. The triangular wave is obtained by the integrating circuit composed of the LMV324 operational amplifier. The sine wave is obtained by the second-order infinite gain multi-channel feedback composed of the operational amplifier. The filter is obtained by filtering the triangle wave. The on-board capacitor filters the power supply, resulting in a stable and pure waveform.

Demo video: https://www.bilibili.com/video/av75716766/

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-18 23:14:30

I have a question about Zebra.
How should I understand the following macro definition? What does it do? #define DEFUN(funcname, cmdname, cmdstr, helpstr) \ int funcname (struct cmd_element *, struct vty *, int, char **); \ struct c
Help the novice analyze this CNC voltage regulator circuit
The following are some unclear points: 1. What is the function of LM358? Amplification? Comparison? How are its pins connected? 2. It is said that this is an open-loop application... What is an open-l
Please advise!
Please advise! How to change the LM358 dual op amp to a single power supply?
A Brief Analysis of Power Management in Windows 2000
Windows 2000 is a new generation of operating system based on NT core. Win2000 is favored by everyone for its reliable and stable performance, powerful network functions and other advantages. Win2000
How to determine the short circuit location when the power supply and ground of the circuit board are short-circuited
A FPGA circuit board was working fine before, but then the 7805 burned out, so I replaced it with a new one. Then VCC and GND were shorted. The integrated blocks on the board were tested and found to
CPLD and CPU communication problem
I need to use a CPLD from Altera to expand IO and communicate with the CPU. The internal logic of the CPLD is relatively simple, basically combinational logic. The question now is how to determine the

Datasheet More

Circuits More