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Third push of the switch the LED goes off? You need a counter chip, to count the number of pushes of the button. Its outputs then either fire up the blink circuit or the glow circuit or the off circuit.
I assume you dont have microcontroller on your borad.
you need a simple toggle circuit which can generate a 0V or 5V based in pressed switch. Then you need a clock cicuit to generate a low frequency pulse to make LED blink. Now to select between blink and constant ON you can use a SPDT switch with inputs to be (5V & bufferred clock) and samling input to be the output of toggle circuit. If you have a diffculty finiding a toggle circuit then I can share some of them with you. it will be simple transistor based.
yes, I am not using any Micro-controller in my board. This type of circuit basically i want to use in my mic preamp ckt.
When MIC is mute LED blink and MIC is in use LED continuous glow.
Any opamp based LED toggle ckt is appreciated.
You can try with 555 timer
1) Configure the 555 timer in Astable mode.
2) Connect the switch between vcc and pin4. connect the resistor of 10k between pin4 to gnd.
3) Now LED in negative logic... i.e cathode goes to pin3 and anode goes to Vcc.
When mute switch is not pressed, pin3 goes low, LED glows.
When switch is pressed, oscillation begins LED starts blinking.
Hope this helps...
You can construct Oscillator for Flashing LED using NAND gates, R,C components. Then use SPDT type of push button to switch between oscillator and +5V for flashing and continuous LED glow respectively!
If other than cheapest possible way is there, then share here!