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Electronics question- SCR gate won't trip.
JasonV
Member Posts: 2,482 ✭✭✭
Because in the past this forum always has someone who knows
Some scumbag is stealing my lunch at work. I have a large Stanley metal lunchbox and am putting a motion activated alarm on/in it.
I have small plastic box about 2'x3" with the motion switch, alarm and 9 volt battery mounted inside.
I had a couple SCRs laying around from a project years ago but can't get them to work. I bought a random one so I have a new one and it won't switch on.
So my question is what SCR do I need to power this little DC piezo alarm from the 9 volt battery. The battery runs the alarm fine I just need to know what SCR will have a gate that is tripped by the 9 volt battery.
formerly known as warpig883
Comments
Forget the SCR, whatever that is,,and make your lunch guest some cookies. A good ol batch of 'Ex-Lax' chocolate chips. Just leave them with your lunch like always,say nothing. You'll find your thief.
Or a dye pack like they use in banks....😝😲
Ex-lax will be just the ticket.
Silicon Controled Rectifier - one of the most important inventions of recent times. An electrical switch with no moving parts.
Get yourself some bunny poop pellets. Chocolate coat them. 🤣😋😂
Kinda makes you wonder how many he will eat before he realizes "them ain't peanuts!!"
Jasonv.......
SCR's are used for controlling A.C. circuits.
A properly biased medium power NPN or PNP transistor should work well for you, in this D.C. circuit.
Hope this helps.
Can of cat food pate some cheese salt pepper lettuce .mighty fine eating right there
When I was in high school, we had a bully that would take pretty much whatever he wanted from pretty much anyone he wanted. He got me for lunch, gum, cash, etc.
One day we had math class across the hall from each other and knowing I was one of his preferred victims, I had a plan, bought a box of Chiclets chewing gum, emptied it and replaced the gum with Ex-Lax chewing gum (they look identical), put the box in my shirt pocked so as to dangle the lure. Sure to form, he spotted the gum and ripped me off, put a handful in his mouth and commenced chewing and went into class, just before the classes ended I saw him running out the door and head for the boys room.
Turns out he crapped his pants big time in class and left a trail down the hall to the bathroom. Was a great day for all that knew him, I was so damn proud of myself I could explode but could never claim victory out of fear of retaliation . Dumb * never made the connection (thank goodness) and was not so cocky from then on. Wonderful what a little humility will do for one's attitude.
We had a thief on the midnight shift who would eat whatever he found in the fridge. A nice baloney samich with hot Chinese mustard laced with cayenne pepper got his attention.
If you mess with him, the retaliation could be worse. Set up a hidden camera, and catch them. Play it in public to expose the thief, then maybe he will move on. If not, call Don.
Had a problem with either 2nd or 3rd shift folks stealing my leftovers out of the fridge . Bought some Dave's Insanity Hot Sauce,precursor to carolina reapers. Loaded down a pizza . Came into work next morning and supervisor told me you got him good ! No more problems from then on .
When I worked at the university we had a painter that would always steal doughnuts from this one guy, he knew it was the painter but just couldn't prove it. One day he brought in cream filled doughnuts and sucked the filling out of one of them and filled it with white latex caulking, put it back in the box and went about his morning. The painter later came in from the shop choking and spitting and was actually pizzed off that someone would do this, he went as far as trying to file a complaint but got laughed out of the directors office ......................... all doughnuts were safe after that.
Hard to file a complaint when you're stealing your coworker's food.
..
When you find the perp (and it looks like based on the excellent suggestions above that you will) be sure to torture him/her with this:
Have ZERO mercy.
And fiery auto crashes
Some will die in hot pursuit
While sifting through my ashes
Some will fall in love with life
And drink it from a fountain
That is pouring like an avalanche
Coming down the mountain
Isn't this a guns / hunting forum?
This is a perfect application for a motion detecting game trail camera.
Thanks for the NPN or PNP tip. I will try it.
So here is what I have going on.
Cameras or laxatives or anything in the food will get me fired so they are out. I am a trapper and believe me when I say I have stinky stuff but I can't use it.
I really wish I could use the camera. I have a borescope that bluetooths video to my phone. The lens is the size of a pencil eraser and would be perfect to be inside the lunchbox recording. I triple checked with HR and they flat out told me I would get fired.
I bought some of the purple dye theft detection powder and used about a teaspoon of it in the lunchbox. The powder gets worse with water and won't wash off. Alcohol/hand sanitizer is needed to remove it.
It only takes a tiny speck of a dot of it to turn both my hands bright purple, a teaspoon would do my whole body from head to toe. I just touched it with the tip of my pinky so there was a bit of dust and a few minutes later my hands were purple, I had purple on my face the stuff just gets everything.
Monday morning at 730 I put it in the fridge. At 10am the lunchbox was good but at 11am the thief had hit. It always happens between 10 and 11.
There was purple all over the break room. On the table, on the shelves in the fridge, on the fridge handle. ZERO purple in the sink or trash can so I knew the thief must have went to the bathroom to try and clean up. Nothing in the bathroom. Got my co-worker to check the woman's bathroom and bingo- like a purple bomb went off in the bathroom. Starts at the sink then in a stall and it is all over. Like they started to wash at the sink then hid in the stall to try and figure out what to do. Even purple footprints on the tile floor.
I found purple in a few hallway door knobs but no office doors. I have co workers watching shoes and the creases in people fingernails for purple. The ladies are all over the shoe thing- it's like they are obsessed with shoes like we are guns. Seriously my best best to catch the person is the other ladies trying to identify the shoes by the shoe print.
I really like the idea of offering a reward. Will have to run it by my HR, they have some weird rules.
I have already planted the seed that someone is messing with lunches and the food may not be safe to eat so people want the person caught. People using the break room are getting pissed because of the residual powder that is turning them purple and I just tell them to catch the thief and they will have the guilty party.
So what is next?
Your HR is messed up. Can't put laxative in your own food, of which is being stolen
But they're ok with the purple dye all over the break room,and in the ladies room??
I think the gal in HR is your thief.
You're going way too high tech. Make yourself a great big sandwich. Lettuce, tomatoes, big slices of cheese and high quality lunch meat. Before you make it, put about 3 tablespoons of mayo in a container on the counter for 4-5 days and use it for your sandwich. Salmonella is the best revenge for food thieves. I'll never steal another sandwich! 🙄
That was exactly my thought too. It's HR. Good luck. You'll definitely want to plant that random beep generator as payback.
And fiery auto crashes
Some will die in hot pursuit
While sifting through my ashes
Some will fall in love with life
And drink it from a fountain
That is pouring like an avalanche
Coming down the mountain
If you have dyed your suspect as you said, my bet is that the thievery is over (unless she/he is stupid).
Don't know where you work but I don't understand why with the dye why you haven't been able to ID the thief.
Any chance they are coming from another dept in another building or something like that.
Harbor Freight sells a driveway alert that is motion operated , put the transmitter in the lunch box and it will sound as soon as the lid is opened.
I really think that the thief will stop now that they are on your radar
So who's the thief ??? @JasonV
I hope you find who it is
JMHO honestly the HR group should be setting up the camera or secretly watching but I am sure they too big of cowards to confront or take the chance of invasion of privacy
to bad we have to so dang PC
a very large capacitor would be fun
one of the construction jobs I was on . we had POS that would seek into the tool / lunch trailer before lunch not every day but often and with it being a tool trailer a lot of people in and out
who ever it was would take a bite of sandwiches or a apple or banana never caught him .
most all the guys would go ahead and eat there sandwich with a bite out of it not a lot of choices it would have been a long day with out eating . I would hate to have been the person and got caught it would not have been pretty , messing with a mans food is not a good idea
I had someone stealing my lunch. I made a sandwich with a powerful laxative mixed in with the mayo. Worked on the first night, the thief crapped himself all the way to his car. I changed lunch boxes the next day.
You know, the more I think about this the more I hate that your food is being stolen. There's little that's worse than a thief. I say stop with the tricks for a while and just lay low. Then in about a week, add some nice edibles or peyote to some of the food. Get that m'fer high as a kite and fired for being a thief and using drugs while at work. That is their just desserts.
And fiery auto crashes
Some will die in hot pursuit
While sifting through my ashes
Some will fall in love with life
And drink it from a fountain
That is pouring like an avalanche
Coming down the mountain
Don't know. Over 1,000 people work there and only a few break rooms so it could be about anyone.
99% sure it is a female and someone that comes to the break room between 10am and 11am. I am too busy to babysit and see who is coming and going.
Pretty sure the person figured out right away that hand sanitizer removes the dye and they got cleaned up. There is hand sanitizer on every desk and table. The way the purple was in that bathroom stall we are thinking she sat in there with a bottle of hand sanitizer out of her purse and cleaned up.
wish you could've got her to identify her. Hope at least this puts a stop to it. Good luck Jason