Reply to "want to make my own flasher circuit to replace 154C"

@JohnGaltLine posted:

The "Go to" device for crossing flashers for quite some time has been the LM555 timer.  This is a simple 8 pin integrated circuit chip, and is cheap and fairly easy to use.  The output of this timer chip can then be connected to transistors or relays to deliver the needed current to drive lightbulbs.  

Here is a basic circuit using LED lights:

You're looking at less than a dollar in parts here if you buy through online suppliers.