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 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…
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…
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…
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,…
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.…
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…
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…
There are alternatives on the market with 4 TR2516T1 ultrasonic transmitter plow transmitter 25kHz 16mm dimensions, the output of which is installed on the CD4093A integrated circuit of the ultrasonic dog repellent circuit, powered by BSS88 mosfets. Output peak voltage can rise up to 85-90V, frequency adjustment can be made with R1 trimpot. In the…
The circuit diagram you see in the picture works as a dark switch with the LDR on it. The circuit consists of four resistors, a 741 opamp, two potentiometers (optional trimpot available), an LDR, a switching TIP122 transistor and a lamp. In the circuit, the value of the resistor R1 is directly proportional to the…