Hello, as part of a project I require a countdown timer with led display.
It seems that the only or best way to achieve this is to use a programmable chip.
Looking at other posts on here I don't think I have the time or brains to carry out the programming
What I require is 'relatively simple' I guess but to me the programming looks daunting.
This is what I require A countdown timer 120 seconds to 0 seconds
The countdown to be displayed on three 7 segment led displays
After the countdown has reached 0 I would like to be able to reset it to 120 by a single simple operation .
( I can buy ready made count down/up counters quite cheaply , it's the reseting to 120 seconds that's the problem)
I will supply the 1 second pulses to operate the countdown.
If I bought a Picaxe kit do you think I could program it easily ,by numbers so to speak or would it entail weeks of practice ?
Can I find a circuit anywhere of the project I described ?
Can anyone program say half a dozen of the chips for me at a reasonable cost and supply a circuit to show connections etc for driving the 3 x 7 segment leds ( I'm in the UK )
I can solder, design simple circuits but my amateur training dates back to the eighties.
Any help much appreciated.
It seems that the only or best way to achieve this is to use a programmable chip.
Looking at other posts on here I don't think I have the time or brains to carry out the programming
What I require is 'relatively simple' I guess but to me the programming looks daunting.
This is what I require A countdown timer 120 seconds to 0 seconds
The countdown to be displayed on three 7 segment led displays
After the countdown has reached 0 I would like to be able to reset it to 120 by a single simple operation .
( I can buy ready made count down/up counters quite cheaply , it's the reseting to 120 seconds that's the problem)
I will supply the 1 second pulses to operate the countdown.
If I bought a Picaxe kit do you think I could program it easily ,by numbers so to speak or would it entail weeks of practice ?
Can I find a circuit anywhere of the project I described ?
Can anyone program say half a dozen of the chips for me at a reasonable cost and supply a circuit to show connections etc for driving the 3 x 7 segment leds ( I'm in the UK )
I can solder, design simple circuits but my amateur training dates back to the eighties.
Any help much appreciated.