Difference between revisions of "tilt switch"
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| Line 9: | Line 9: | ||
+---*-->|---*----/\/\/---+ | +---*-->|---*----/\/\/---+ | ||
| ** ** | | | ** ** | | ||
| − | SW1 \ ***** ******* | + | SW1 \ ***** ******* Q1 |
\ ** . ** | \ ** . ** | ||
| * | | * | | * | | * | ||
| Line 30: | Line 30: | ||
SW1 : tilt switch, ball or mercury | SW1 : tilt switch, ball or mercury | ||
LED1: high brightness white LED | LED1: high brightness white LED | ||
| − | + | Q1 : 2N7000 or BS170 | |
</pre> | </pre> | ||
Latest revision as of 12:43, 24 February 2016
This is a tilt switch for an LED flashlight or other moderate load. The BS170 is preferred to the 2N7000 because it can handle twice the power.
+V LED1
| *****
| ** ** R1
+---*-->|---*----/\/\/---+
| ** ** |
SW1 \ ***** ******* Q1
\ ** . **
| * | | *
+-----------------*.---| *
| * | | *
| ** . **
| *******
| C1 |
+--------)|--------------+
| |
| R2 |
+-------/\/\/------------+
|
-----
--- GND
-
R1 : 300 Ohm
R2 : 1M Ohm
C1 : 1000 uF, electrolytic or tantalum, polarized
SW1 : tilt switch, ball or mercury
LED1: high brightness white LED
Q1 : 2N7000 or BS170
