|
|
|
Stroboscope |
|
|
 |
|
The 220v supply is rectified
and then used to charge the two 3µ* capacitors. The 1µ
capacitor also charges (more slowly) through the 150k
resistor and 1M variable resistor. When the voltage across
the 1µ capacitor is high enough to cause the diacs to
conduct, the thyristor is triggered. This produces a high
voltage "pulse" at the secondary of the transformer. This
pulse causes the tube to conduct and a flash of light is
produced. |
|
Printed circuit board
: Component Side |
|
 |
|
Printed circuit board
: Copper Side |
|
 |
|
|
| N.B. |
|
|
| |
Resistance
powers: |
220 ohms 10
watts |
| |
|
12 ohms 1 watt |
| |
|
150k 1 watt
... |
| |
Capacitor
voltages: |
3µ 350v
|
| |
|
1µ 100v |
| |
*For the 3µ capacitors, use three 1µ capacitors in
parallel (as shown in the
component
side diagram). |
|
Acknowledgements : The stroboscope was taken from an excellent
French electronics magazine (sadly, no longer published) called
"Elex".
Top of the Page |
© David Hoult 2009
|
The
Open Door Web Site