Passive tone control circuit | Loudness Control
The Passive tone control circuit, to adjust bass-treble with no the expansion, use equipment R and C only, to filter frequency,easy without power supply! […] Read more
10 sec to 30 min transistor time delay circuit
This is a transistor time delay circuit based on learning the discharge and charge of the C and transistor. or we called Capacitor Time Constant This can be used as a timer circuit and applied to OFF electrical appliances. The application has also put relay instead of LED can be enabled. This circuit is working … Read more
555 audio simple ohmmeter circuit
This is 555 audio simple ohmmeter circuit. Some times, we need to measure roughly resistances only. we can know resistances by audio also fast check. […] Read more
Simple Frequency Divider using one transistor BC549
If you looking for simple frequency divider circuit. This may be suitable for you. It will divide a frequency of input signal into just half to output. Read more
Three bounceless switch circuit using digital IC
The simple bounceless switch circuit. It is one kind of electronic switches, high quality, and low noise. They are suitable for the digital circuits. Why? Read more