| ??? 12/17/11 10:44 Modified: 12/17/11 11:26 Read: times |
#185135 - cost Responding to: ???'s previous message |
Jeckson, I believe that when Richard or Andy ask for a number, they're asking about cost per unit, not projected sales volume. How much (or how little) do you want to spend on each alarm sensor?
with MCUs,It's only 2 US$(AT89S51/52 or MSP430) include "thief sensor". For ATmega perhaps only 4-7 US$.Depends with kind of ATmega's with NXP LPC..I'm still looking the tables price of NXP. The simplest solution would simply be to mount a micro-switch on the rack that is contacted by the case. If the case is removed (even a fraction of an inch) the contacts trigger an alarm, but as long as the case is securely mounted to the rack the circuit will be completely insensitive to shock induced false alarms. As we knew that simple switch maybe very-very cheap--->the knob that appears from boxes(maybe below). But that way only at "hard base" and "weight of Box" related to switch operation(ON/OFF). What about soft base?like placing at above bed. Shake the box? without pull from base.. http://www.facebook.com/photo.php...472&type=3 Let that for "portable" equipments. Thank you Jeckson S Ben |
| Topic | Author | Date |
| Freeze..thief protection | 01/01/70 00:00 | |
| Alarm Sensors | 01/01/70 00:00 | |
| Earth magnetic field sensor | 01/01/70 00:00 | |
| inexpensive solid state magnetic field | 01/01/70 00:00 | |
| It means.. | 01/01/70 00:00 | |
| ??? | 01/01/70 00:00 | |
same | 01/01/70 00:00 | |
| Too vague! | 01/01/70 00:00 | |
| Cost - and what type of protection/detection | 01/01/70 00:00 | |
| How low is "low" cost? | 01/01/70 00:00 | |
| OK..great..maybe Links | 01/01/70 00:00 | |
| Still no idea what you actually want | 01/01/70 00:00 | |
| What exactly? | 01/01/70 00:00 | |
| Bounce | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| If it's networked | 01/01/70 00:00 | |
| hard to handle | 01/01/70 00:00 | |
| Come on ... it requires a number | 01/01/70 00:00 | |
| numbers | 01/01/70 00:00 | |
| cost and reliability | 01/01/70 00:00 | |
| cost | 01/01/70 00:00 | |
| Does that mean you don't know what your price target it? | 01/01/70 00:00 | |
| soft base | 01/01/70 00:00 | |
| manufacture products | 01/01/70 00:00 | |
| shock sensors | 01/01/70 00:00 | |
| advice | 01/01/70 00:00 | |
| Capacitive solutions can be projective | 01/01/70 00:00 | |
| metal.. | 01/01/70 00:00 |