Telephone Ringtone Generator
This is really a very simple home telephone ring tone generator circuit which is built with applying only several electronic…
Automatic Switching-on Emergency Light
Automatic Switching-on Emergency Light The schematic diagram shown right here is the automatic switching-on emergency light circuit which is controlled…
DC Motor Speed Controller
This is the schematic diagram of DC motor speed controller circuit. The circuit applies two oscillators/timers which are connected as…
Multitone Siren Alarm
Here the simple schematic of multitone siren alarm circuit. This multitone siren is effective for reverse horns, burlgar alarms, and…
Pyroelectric Fire Alarm System
This is definitely an ultra-sensitive fire sensor that exploits the direct piezoelectric property of an ordinary piezo component to recognize…
Report: DC/AC Pure Sine Wave Inverter
Here the project report of DC/AC pure sine wave inverter. This report focuses on DC to AC electrical power inverters,…
Car Cigar Lighter to USB Power Socket
Here is the schematic design of car cigar lighter to USB power port. Nowadays, almost all computer systems have logic…
Adjustable Analog Timer
This is a very simple adjustable analog timer circuit diagram. You can build this circuit just for fun, for newbie…
6 Transistor Tilden’s H-Bridge
This diagram is certainly the 6 transistor Tilden H-bridge circuit; while not as old as the original "basic H-bridge," this…