Suppose, you want to use the 5Vdc power supply levels up to 100mA, But there is only one single AA 1.5V battery. This working we need to use The DC to DC converter step up voltage. but will choose which is better circuit well, to create simple and small. I try to was looking on … Read more
This is FM receiver circuit using sex transistors that very small size and cheap, The trimer capacitor To control the frequency from 87MHz to 108 MHz. Read more
These are the wideband active antenna circuits for the SW/MW/FM radio receiver. We can try to test it with many brands of radios. Why should we use this circuit? In normal, we short-wave radio receiver. We need to use a long antenna. But with the helping of this circuit, we can use the only 18-inch … Read more
If you want to check the peak voltage of the signal to change at any time. Measuring with a multimeter will not do it. We recommend this circuit. It may help you. Precision Peak voltage detector with a long memory time We use this circuit The op-amp IC number CA3140 is the main equipment, acts … Read more
We have many ways to make the function generator. Using NE566/LM566 is a good choice. Because it easy to use. It looks like a NE555 timer. And we often use the NE566 as Voltage controlled oscillator or VCO circuit. It is a type of oscillator. We can control the frequency of the output with the … Read more