Menic -10V

[Jindrich Vidensky]

Toto zapojenie som kdesi vyhrabal, nemam odskusane.
Treba to samozrejme pozriet s neproporcionalnym fontom.


S pozdravom
Jindrich Vidensky
vidensky@klimakonzult.sk


          +V 
           ^ 
           | 
   +-------+---+ 
   |       |   |                  -V Output 
  R1       |8  |4        +----+---> 
   |    7 -------        |    |            Parts List: 
   +-----|       |      D2    |            IC1 = 555 
   |  +--|       |  +    |    |             R1 = 1.5K 
  R2  | 6|  IC1  |---C1--+    |             R2 = 10K 
   |  |  |       |3      |    |             C1 = 150uF,16V         (10 uF) 
   +--+--|       |      D1   C2             C2 = 1uF,16V           (22 uF) 
   |    2|       |       |    |+            C3 = 3300pF            (1500pF) 
   |      -------        |    |             D1,D2 = 1N4154 diodes  (1N4001) 
  C3         |1          |    | 
   |         |           |    | 
   +---------+-----------+----+            * green parts were changed from the original (that are HERE) 
                                            for my configuration 
             | 
            === 
           (GND) 

Note: In the above "diagram", both diodes point down (the anodes are at the top). Also, watch the polarity
of C1 & C3. 

The circuit is set up to oscillate at about 45kHz, with a duty cycle pretty close to 50%.
None of the values of any of the parts are terribly critical, so if the capacitors 
or resistors are "in the ballpark", it should still work okay.