Looking for some analog circuits to make i got this circuit of laser based audio transmitter on efy website. Giving it a try I decided to build one from the parts lying around. It uses a common 741 and LM386 ICs. Only schematic is available so created a layout for both transmitter and receiver. i have used signal from mobile jack instead of using microphone. Continue reading “Laser Audio Transmitter”
Tag: Circuit
Arduino UNO based fingerprint sensor interface
Arduino helps in simple interfacing for different modules. Here is an implementation of fingerprint sensor interface with Arduino Uno board. Four push buttons are used for input. The menu on LCD guides the enrollment and scanning process. The connections for hardware are described in image. Continue reading “Arduino UNO based fingerprint sensor interface”
DIY PCB
Making electronics projects and finally watching them work is very interesting. But assembling components on a general purpose PCB is very cumbersome. It’s is a very time consuming task and sometimes the circuit mess up so much that it becomes irritating to work. It will be a great if one can fabricate PCB (Printed Circuit Board) for electronics projects at home. It is an interesting task for any electronics hobbyist. It saves time to complete a project and also increases the reliability of project. Continue reading “DIY PCB”