Using a tilt sensor with NPN transistor

Question

i'm making a fall prevent circuit and i want to make sure that this circuit is correct which i made

I would like to check because I don't have enough budget and time to buy many other parts

and this is my tilt sensor datasheet

this is my questions

i put the C2, C3 Electrolytic capacitors (as the datasheet says)

can i replace C2, C3 to ceramic capacitors? (smd type 0608 size)
do I need to add electrolytic capacitors or ceramic capacitors to the buzzer for the life of the buzzer

How does it prevent "falls" --> i'm making a fall prevent circuit <-- do you mean an excess tilt angle warning system? Where do bat_in and bat_out connect? Should there be connectors for the input power and the bat connections? What's an ADW11? — Andy aka, Commented Jan 15, 2023 at 16:24
rated current of tilt sensor is 2 mA MAX. Current Ib =~ 5 mA ... and buzzer current = ~ 8 mA ... Some things to check. — Antonio51, Commented Jan 15, 2023 at 16:31
do you mean an excess tilt angle warning system? - yes, sorry i'm not good at english rated current of tilt sensor is 2 mA MAX - yes, for using buzzer i think i have to add another transister — KimJiHoon, Commented Jan 16, 2023 at 0:19
i found a new tilt sensor SW-520D 12V / 20mA i think i can use this — KimJiHoon, Commented Jan 16, 2023 at 0:55

Antonio51 · Accepted Answer · 2023-01-17 08:52:19Z

0

Something like this could be used ...
The capacitor is used at the start (24V effectively applied to the relay for working).

answered Jan 17, 2023 at 8:52

Antonio51

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\$\begingroup\$ thank you! i'll try that and i added 470u/16V capacitor between transistor's base-ground because the output voltage very unstable(shakes) when the tilt sensor is almost horizontal. \$\endgroup\$
– KimJiHoon
Commented Jan 17, 2023 at 10:11
\$\begingroup\$ Do it ticking "right" answer ... \$\endgroup\$
– Antonio51
Commented Jan 17, 2023 at 12:55

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