100w Inverter circuit 12V to 220V using Transistor
This is inverter 12V to 220V that 100W output using all BC557 PNP and 2N3055 transistors so easy to build and cheaper, we use 12V 10Ah and transformer 5A up. […] Read more
3000 watts Dimmer for Inductive Load
This is the 3,000 watts Dimmer for inductor load example: the Electric Fan, AC motor, Electric drill, etc. But most general dimmers are used for resistors load only such as a lamp, soldering iron, heating coil, etc. Why our project can do? The normal dimmer cannot use for inductor load, because of the phase of … Read more
How do protect Reverse polarity switch and alert
This circuit is an automatic reverse polarity switch. If we apply DC voltage to any electronic circuits in the wrong polarity. It can be caused by too much current. You must waste time to reverse the new terminal. If your circuit is important, let’s build this project to your life will better. Automatic Reverse polarity … Read more
6 ranges AC millivoltmeter circuit
Sometimes, we need to measure a too tiny AC voltage level. And high frequency too. Ohh… We cannot use general multimeter. I recommend you try watching the AC millivoltmeter circuit. It includes the 6 ranges. Lowest is 15mV only. Also, it uses an analog meter form. So, you can watch easily a slow changing of … Read more