From: burrynulnulfour@ppllaanneett.nnll   
      
   On 18.05.19 19:50, AK wrote:   
   > On Saturday, May 18, 2019 at 12:18:45 PM UTC-5, default wrote:   
   >> On Sat, 18 May 2019 09:52:29 -0700 (PDT), AK   
   >>  wrote:   
   >>   
   >>> I am trying to find info about what a low leakage capacitor is.   
   >>>   
   >>> I read that aluminum electrolytic caps have a higher leakage rate than   
   most other types.   
   >>>   
   >>> How do you determine if a capacitor is low leakage?   
   >>   
   >> How fast does it lose it's charge just sitting there?   
   >>>   
   >>> I was looking at this one.   
   >>>   
   >>> 0.1礔 250 Volt 10% Metallized Film Capacitor Axial   
   >>> Specifications   
   >>>   
   >>>     Capacitance: 100000 pF / 100 nF / 0.1礔   
   >>>     Voltage rating: 250 VDC   
   >>>     Tolerance: �   
   >>>     Size: 14mm x 8.5mm x 4.5mm (W x H x D)   
   >>>     Axial leads   
   >>   
   >> Metal film caps are all low leakage compared to electrolytics. There's   
   >> something else call "dissipation factor" that only comes into play at   
   >> some AC frequencies (how much power the dielectric wastes as heat).   
   >>   
   >> What you are doing is low frequency and the capacitors aren't   
   >> critical.   
   >   
   > Ok.   
   >   
   > Thanks. I field tested my circuit on my patio.   
   >   
   > Without the laser, ambient light is enough to keep buzzer off.   
   >   
   > I passed my hand over the LDR from about a foot away and it sounded.   
   >   
   > But it won't work from about 6 feet away which is about the range I need.   
   >   
   > So it looks like even with a laser shining and someone breaks the beam, it   
   may not sound if the light level is high enough.   
   >   
   >   
   >   
   Put the LDR in a 1 inch plastic tube,20 inch long and paint the tube inside   
   with black flat paint(used for school boards).   
   That will keep the ambient light out, and does not inhibit the laser   
   beam.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)