Party is a lot of fun. Alcohol makes us happy. And. we should make an alcohol tester. Why? We do not need sad about it, right? Imagine your friends who live in California, USA. He said that he likes to party with friends. With alcoholic beverages and the need to drive a car. He does … Read more
The Dynamic Microphone Preamplifier circuit. So low noise signal,use three transistor (2SC945, or 2C1815 or 2SC828) is transistor amplifier with a low noise […] Read more
Can we build the switching dc power supply circuit with 2 transistor? This may be a good choice for you. Read more
This automatic night light circuit to controls power on-off in home. If daytime stop working circuit. But at night will working electrical AC 220 volts. […] Read more
This small RF remote control or Radio Control (RC) circuit. can install it a toy or automobile, 6-12 volts supply. RF receivers in car will control motor. Read more