The circuit is a simple circuit that can be an example in the field of medical electronics, medical electronics, based on the LM2904 op-amp integrated circuit. Heartbeat and pulse detection is done with the LTM1550-01 photo sensor, sound is given with the buzzer on the circuit and light warning is given with the LED.
4 AA batteries can be used as a power source. When you put your fingertip on the sensor, it detects the pulse and reports the heartbeat lightly and audibly. There is a PCB drawing and parts list in the image format of the project.
Heartbeat Pulse Circuit
Heartbeat Pulse Detection Circuit Diagram
Published: 2010/06/13 Tags: analog circuits projects
PIC16F877 Car Wiper Control Circuit
In this article, a system used in cars which will give information on the wiper control. I made the second one PWM circuit simulation engine will run the servo motor and water spray relay is located. Circuit PIC16F877 microcontroller based on the engine version was used in the IRL530N MOSFETs.
Wiper Control