reed switch in circular motion detection
reed switch in circular motion detection
(OP)
I am having a problem with a very simple schematic. Basically the object is a reed switch tracks rotational motion, sending 12V pulses into a simple square to triangle circuit (integrator, rc circuit)driving an led. The problem is the reed doesnt like the cap. When I bypass the cap, circuit works fine as a simple on/off scheme. With the cap in the circuit, the reed switch locks up and has to be smacked a few times to operate. If I remove the reed switch and use a simple spst switch, circuit works how it is supposed to, converting a pulse into a triangle wave. I attempted using diodes in different arrays to isolate the reed switch to no avail.... not sure if it is recieving a drain voltage ect? any help please? I have included the schematic in case needed
or a link to the schem. <a href="ht tp://n0009 1.myspace. com/00091/ 69/28/9187 8296_m.gif">Square to Tri</a>
or a link to the schem. <a href="ht




RE: reed switch in circular motion detection
The problem for the reed switch is that the cap appears to the reed switch as a dead short everytime it closes! This is welding the reed switch shut. Your regular switch is capable of conducting this surge without welding. Or it may be welding too, but you directly act on the contacts when you flip it.
You need to use either an op amp circuit to do this or a logic chip like a HC14, that is switched by the reed. Use the gate's output for your integrator.
RE: reed switch in circular motion detection
RE: reed switch in circular motion detection
RE: reed switch in circular motion detection