This Simple touch switch using transistor is the touch switch is updated from the original version. Which use IC to control the operation cause difficult for the electronics beginner. So this circuit is thought to are suitable because uses TR purely. When was broken also a simple repair. and More cost-effective equipment. But The application is easy namely when we want to relay connected A and B contract. But when we want to relay release We also touch on the B and C. The working principle When we touch at point A and B will be has some current from …
When we say to the an astable multivibrator circuit, Many people will think to Many people think of as the most IC-555. But this time, it is recommended circuit in Figure 1. Which use IC-4047 CMOS as Simple astable multivibrator circuit with ability of this nature as well. And the advantage is, That output will be a square wave, which has three forms are: First at pin 13 of IC1 will be basic frequency, Second is pin 11 will be Is half that of basic frequencies, And thirdly at pin 10 is half the frequency of basic frequency. but will …
This is Simple emergency light circuit with charger that light on 30 minutes after the power outage, so use normal transistor as base of circuit. At the time of power failure. Especially during the night. Many people do not like the dark. Emergency lighting systems on the market, it has expensive. We make a emergency lights with a simple electronic circuit. But it is enough to use it to some degree. This circuit makes light bulbs for nearly 30 minutes after the power outage. As Figure 1 First of circuit that use to drive the lamp, which consists of a …
This time delay relay circuit can be used to time delay for the load, To be connected to the relay output to run after a specified time. Which during this time. Can be adjusted by changing the R1 and / or C1. The current of circuit is limited by type of relay that use. Figure 1 Time delay for relay using CD4011 Calculate the discharge time delay Can be calculated by the equation T = R1 x C1 x 0.85 By that: T is the period of the delay is in seconds. R1 is the resistance in ohms. C1 is …