Hi,
I'm looking for the cheapest and simplest possible design to flash a led. It is for an academic exercise unrelated to electronics but related to how to organize processes.
We were using the LM3909 before but it is too expensive now and we need to buy hundreds of components. We have tested an alternative design with a 555 that is cheaper but is too complex for our purposes. The idea is to organize the process to assemble as many flashers as possible in the least possible time (on breadboards). Our design with the 555 has two resistors and it takes a lot of time to assemble.
Does anyone know of a simpler design (e.g. involving no resistors at all) with a chip that is cheaper than the LM3909? No concerns about energy efficiency, elegance and so on, the point is just how to design a process that allows to assemble as many kits as possible.
Thanks a lot!
I'm looking for the cheapest and simplest possible design to flash a led. It is for an academic exercise unrelated to electronics but related to how to organize processes.
We were using the LM3909 before but it is too expensive now and we need to buy hundreds of components. We have tested an alternative design with a 555 that is cheaper but is too complex for our purposes. The idea is to organize the process to assemble as many flashers as possible in the least possible time (on breadboards). Our design with the 555 has two resistors and it takes a lot of time to assemble.
Does anyone know of a simpler design (e.g. involving no resistors at all) with a chip that is cheaper than the LM3909? No concerns about energy efficiency, elegance and so on, the point is just how to design a process that allows to assemble as many kits as possible.
Thanks a lot!