Hi, I'm looking for some ideas on building an anti-tamper circuit for an 08M based device. The 08M would be on a circuit board in a dark plastic project box. The idea is to disable the circuit if the box is opened with power applied or not. Several ideas come to mind: 1 - use a photo-transistor to drive a fet/transistor and blow a fuse so the 08M will no longer turn on. 2 - Use a photo-transistor to trip a latching relay to disconnect power to the 08M. 3 - Use a variation of the circuit with a momentary push button to power on the 08M and a light sensor/transistor to turn it off.
The 08M would have an external (to the box) power source. I would like to be able to disable the 08M (ie interrupt it's power path) even if it is not powered at the time. Suitable means might be an internal battery, a super capacitor, or perhaps something I haven't thought of yet. The purpose is primarily to annoy snooping users...
I'd also like the circuit to be less than obvious to an un-trained eye. A mini-fuse painted to look like a resistor or a mis-labeled IC or relay would be sufficient.
Does anyone have any ideas, similar devices, or advice?
Thanks,
Paul
The 08M would have an external (to the box) power source. I would like to be able to disable the 08M (ie interrupt it's power path) even if it is not powered at the time. Suitable means might be an internal battery, a super capacitor, or perhaps something I haven't thought of yet. The purpose is primarily to annoy snooping users...
I'd also like the circuit to be less than obvious to an un-trained eye. A mini-fuse painted to look like a resistor or a mis-labeled IC or relay would be sufficient.
Does anyone have any ideas, similar devices, or advice?
Thanks,
Paul