In two Circuit diagram below,just use 2 transistor,2 resistors and one transformer only. They can convert 12VDC from battery to 220VAC or 120VAC to apply small light bulbs or lamps max 10 watts. Read more
This is Electronic Stethoscope circuits. Usually the stethoscope is a medical device that listens to the heartbeat. Which we can make it with the least amount of electronic equipment so easy to make. Read more
For learn about MOSFET. I recommend Time Delay circuit easy to make and long time and a few parts than normal transistor Read more
The 1.5v led flashlight circuit which also use single AA 1.5V battery. But few parts. Such as we use one transistor only. And all other parts of 5 pcs only […] Read more
Here are simple electronic siren circuits using transistors suitable for a beginner learning electronics. It only requires 6V to 12V power. Read more