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I only want it to go every 20 seconds. How would I make that work?
All it is, is a Key Holder that Beeps every 20 seconds if the Key is removed.
Glue Some magnets to the Tags, and use Magnetic switches attached behind the holder. Key is removed, the thing beeps at 20 second intervals.
Would like it to Plug in to AC outlet.
I would like it to be nice and sturdy.
Anyone have any ideas of where I can get this made for me? Anyone want to make it. Ill pay for it of coarse.
Employees have a bad habbit of taking keys to use them, then setting them down somewhere, or putting them in their pocket. This beeping would prevent that from happening.
Let me know if yall have any ideas.Keep in mind, It will get heavy use and should be built really sturdy.
In general, in engineering: The first one is always expensive -- then you can do work to make 10,000 ones very cheaply :-)
Power adapter is fine. Battery powered is fine even if its a big deal. I can replace a 9 volt battery every now and then.
Cost: Honestly, I wasnt thinking it would be much at all. I was thinking $50 in parts from Radio shack, and some money for the build.
I guess I would be happy to pay up to $400 total for the item. I cant tell you how much of a hastle it is to deal with the keys missing.
You're really way out of synch with reality, estimating as you did - please leave the engineering estimates to engineers
I want the Key Holder to Beep. Not the Keys.
If it's not the key part that beeps, how would it prevent an employee from pocketing the key?
unsigned long keyLastSeen[NUM_KEYS];unsigned long lastBeepTime;setup() { set each of the digital inputs to input set the buzzer output to digital output initialize all "key last seen" values to current time set lastBeepTime to current time}loop() { unsigned long longestAbsence = 0; for each key index { if (key present) set keyLastSeen[index] to current time longestAbsence = max(longestAbsence, current time - keyLastSeen[index]); } if (longestAbsence < INITIAL_MISSING_TIME) { turn beep pin off lastBeepTime = current time; } else if (current time - lastBeepTime < BEEP_TIME) { turn beep pin on; } else if (current time - lastBeepTime < BEEP_INTERVAL) { turn beep pin off; } else { lastBeepTime = current time; }}
I live and work in the silicon valley.
Designing and building this thing with beeping keys for less than $3k is unlikely to happen here.
Lucky you to live in a cheaper part of the world :-)
I am good with a Soldering Iron and Can assemble things. If I know exactly what to get and have instructions, I can put it together.
The Rack int he link is Fine. 8 Keys Tags is enough. I can hang the rack on a wall, so I have plenty of room.
For option 3, what kind of Price are you thinking?
Au contraire I'm afraid. Denmark is one of the (if not the) most expensive countries in the world.
You would need around 5,541.78$ (31,323.82kr) in San Francisco, CA to maintain the same standard of life that you can have with 31,000.00kr in Copenhagen
If I cant find a watch to trade, how much would you want to program the board and deliver it with instructions and a parts list.?