Welcome to electroschematics.com, the weblog where we discuss about electronic circuits schematics, printed circuit board diagrams and electronics projects diagrams. Discover electronic circuit designs, basic electronics ideas, circuit wiring, kits and new ways to practice your hobby. A huge collection of electronic schematics: audio amplifiers, radio and IR transmitters, antennas, diy kits and more.
This is a multifunction RJ45 network cable tester. It is the design of the network cable (RJ45) test, and telephone (RJ11). It is cheap and easy to use. It works for network, telephone, cable with RJ45 half “Registered Jack” plug immediately indicate whether a crossover network cable or straight, flashing a yellow or green LED. If something is broken or if you press the button, the tester is in line with the wire test.
With the help of a simple ceramic piezo-electric detector it is possible to assemble an interesting and useful Impact sensor unit,which can be used to detect impact and vibration on doors, showcases, windows etc. The shock sensor (Ceramic piezo-electric detector) uses a “unimorph” diaphram, which consists of a piezo-electric ceramic disk laminated to a metal disk. The sensor supplies a voltage proportional to the acceleration of the impact or vibration, for example 40mV/G ie output is near 2V for 60G impact.
This is a very interesting a.c. voltage stabilizer that uses a LDR or photoresistor to stabilize an alternating current (AC).
This variable Zener diode circuit acts like a Zener diode with a breakdown voltage adjustable in a vast domain. The current through the voltage divider R1 and R2 must be higher current through the voltage divider should be higher compared with that of the transistors base. It depends only by R1 and has been set to 8 mA.
