16 keys keyboard encoder circuit using 74C922N
It may be difficult. In the design of the BCD signal generator circuit by pressing a key. Here is how you make a keyboard encoder circuit for 16 keypads. Read more
18V DC power supply circuit using LM7818
When I need to use DC regulator power supply 18V 1A for the transistors pre tone control circuits. Read more
Audio peak limiter circuit to improve input signal
The simple audio signal overload protection circuit. Why use it? it will protect input of power amplifier away high amplitude, more than1Vrms. Easy circuit! Read more
3 Sound activated switch and Detector Circuit with PCB
This is Sound switch circuit,using IC-1458 and SCR-C106D It will work only if the loud is overdue,for player cameras, can apply to a Burglar alarm circuit Read more
Monostable multivibrator using 555 timer
These are many Monostable multivibrator using 555 timer. We use it as timer for control a load, LEDs,driver relay. Which trigger them using a normal switch. […] Read more