Electronics > Beginners
How does an electronic safe use a 9v battery to power a solenoid?
austfox:
I’ve used quite a number of these safes (shop safes, smaller ATMs etc) and the 9V battery easily lasts a year or two. Therefore I assume they work via a combination of electrical (solenoid latching a pin out of the way to allow the handle to turn and move the locking bolt to the unlock position), and mechanical (once the handle is turned back to normal position it mechanically disengages the latch of the pin and the lock bolt returns to the locked position).
If you briefly apply power to the solenoid does it allow you to open the safe after the power has been removed?
flyingblindonarocketcycle:
Thanks for all the knowledge. My safe is now operational with its new brain and a 9V bat. The mechanics work exactly as austfox described.
Cheers
FBOARC
eugenenine:
Something that tutorial misses is solenoids have a pull in current and a hold in current. If your going to hold the solenoid energized for more than a half of a second you can reduce the power to it to save more battery life.
james_s:
--- Quote from: flyingblindonarocketcycle on December 30, 2019, 12:36:43 pm ---Thanks for all the knowledge. My safe is now operational with its new brain and a 9V bat. The mechanics work exactly as austfox described.
Cheers
FBOARC
--- End quote ---
Nice job. I always like getting a followup on threads like this so we know what happened.
tebbybabes:
Really interesting read! Thanks!
Navigation
[0] Message Index
[*] Previous page
Go to full version