hi i am completely new to Electronics i need to create a motor circuit that will have a 10 sec delay before the motor starts running when the circuit is close.

i tried to do some google on this and it says a 555 IC and RC circuit will do the job , some says 555 is not needed. but im totally new and i dun understand the sample circuit.

is it really as easy as putting a resistor and capacitor on a series circuit ? using the formula T = R * C to calculate the time delay?

If the answer is no , may someone please show me how it is done. thanks a lot

Hello Electronicaguys,

im looking for perfboard? anyone knw where to get one of this stuff?

Thank you in advance

Does anyone know where I can buy robotics in LYN? XD Your help is very much appreciated

Quite rare here in Malaysia, unless you come across those that have been programming industrial automation machines, remote control devices, alarm systems, tracking devices, etc.. 

There are plenty of tutorials on the web on how to debnouce switches (the most common is using resistor and capacitor in combination with schmitt trigger, or using a pair of NAND gates). What is the switch type and/or circuit? Is it a normally open SPST (push to make), normally closed SPST (push to break), or non-latching SPDT switch? Is it using pull-up or pull down?

Simplest solution is to add a capacitor in parallel to the pull down resistor. The moment you press, the capacitor charges up quickly thus maintains the voltage for a while (thus spurious impulses will be smoothed out), until the pull down resistor discharges it at a slower rate. The values of the capacitor and pull down resistor will depends on your requirements (e.g. the minimum pulse time when the switch is pushed temporarily).

You can find lots of tutorial on capacitor discharge calculations on the web. Usually the usual V=Vo*e^(-t/(R*C))