Tag: analog circuits projects

Analog electronic Analog electronic projects application schematics

LM3915 80 LED Audio Spectrum Analyzer Circuit

| 2021/09/30

LM3915 The connection stands and falls with analog amplification and filtering of audio signals using operational amplifiers. The audio signal is first amplified and impedance separated by connection with the operational amplifier IC9 TL071. Negative feedback (and thus signal amplification) is affected by the TR1 680k trimmer. You can calculate how many times IC9 will…

Microphone Vu Meter Circuit Strip Led

| 2021/09/20

The microphone vu meter circuit was normally a classic design with 10, I just rearranged it as a single channel strip led vu meter by using the microphone preamp stage and increasing the output power with 50N06 mosfet IRFZ44, IRF3205 and similar N-channel mosfets can be used instead of 50N06 mosfets used in the LM358…

Speaker Protection Circuit

| 2021/09/20

One of the reasons why the speakers fail is that the amplifier fails and gives DC voltage to the output. The speaker protection circuit detects the DC voltage at the amplifier output and disconnects the speaker. The DC voltage detection level of the protection circuit is very low (0.7…1V) so that the speaker is protected…

Galvanic Isolation Logic Analyzer 8 Channels

| 2021/09/20

Galvanic isolation for a logic analyzer with 8 channels. Galvanic isolation for Logic Analyzer with 8 channels. Suitable for use up to 2MBit with 2V level and a little faster at higher levels. As always, everything is freely available, including a circuit diagram, board, etching mask and even a Reichelt shopping basket. I have purchased…

CNC Motor Driver Tester

| 2021/09/19

The purpose of the Motor Driver Test card is to check any of the motor drivers used especially in CNC machines. The tester is connected directly to the motor driver board instead of the interface. The tester has 4 switches that determine the state of Direction Signals (change direction of rotation), Enable (drive enable), Step…

Water Level Control Automatic Tank Filling

| 2021/09/19

Simple 555 circuit. The water tank filling circuit is based on the NE555 timer IC. By measuring the water level in the tank, it automatically starts the water pump motor at low water level and stops the water motor when the water in the tank reaches the specified level. The circuit can be used for…

Heat Sensitive Fan Speed Control Circuit

| 2021/01/12

A circuit PCB design that adjusts the fan speed according to the temperature was made as small as possible, most of the components are SMD, in addition to the fan control circuit I share in the PCB drawing I prepared for DIP components. Fan control circuit; Amplifier, power supply circuits etc. The fan control circuit,…

OBD II Socket Adapter PCB

| 2020/07/02

The project is an external OBDII socket interface that allows easy access to the CAN bus and other transmission lines used by vehicle manufacturers using a diagnostic tester. Recommendations: the project is designed for car services and workshops dealing with electronics and diagnostics. All electronic modules are connected in parallel to a 2-wire twisted pair.…

Automatic Polarity Stabilizer Simple Relay Circuit

| 2020/07/02

Simple circuit with relay that directs output at the correct polarity when DC input is reversed. In reverse polarity protection, there is no output in the wrong connection. With this circuit, it gives output in all kinds of connections. In this connection there is a circuit that is inserted between the power supply and the…

Adjustable Delay Circuit

| 2020/04/27

An uncomplicated layout that will perfectly test sift wherever necessary delay the application of any device. Delay time it can be adjusted from about 2 to 120 seconds. It may find use on for example, in a car, in the role of a system delaying the application of any receiver, e.g. The main element The…