Siren light from running light
The siren light use that general use motor help in the whirl lamp or refect go to around, which weigh very and when be usable go to for a long time will cause the wearing out. but if we modify light running pretend siren make get siren that weigh light and can be usable for a long time go up. The work of the circuit will divide the work goes out to are 3 the part, be origin frequency part will compose IC1 555 numbers will perform frequency origin. which fix get with the value of R1, R2 and C1. …
4 Touch Switch circuits
These are 4 simple touch switch circuits. We can build them easily because use basic components. We just touch the sensor lightly. Our bodies have resistance. It makes the current flow through the circuit is changed. The circuit will recognize and then turn off the electrical appliances. We have 4 circuits below. You can choose the one you want. Touch switch circuit using 555 timer This is Touch Switch ON-OFF circuit used a part compares with voltage 2 group , within the integrated circuit timer LM555 or NE555. For perform wait for catch the change of voltage , which be …