| ??? 02/04/07 12:24 Read: times |
#131969 - Part of photoflash circuit Responding to: ???'s previous message |
Hi everyone!
The 2200uF is a photoflash capacitor which is conneced across a flash tube. This capacitor is discharged through the flash tube. The voltage across the capacitor is sampled by a microcontroller which controls the charge developed across the capacitor. For example, for a low light output the capacitor would be charged till only 60V (say) and for a high flash output it would be charged to peak voltage (340V). The microcontroller would be controlling the on-time of the SCR. So now that you know that I am not into 'explosives' (:-),any feedback on the practical working of this circuirt woudl be welcome (especially the inductor, its value and 'is it essential?')(Isn't 4.6 mH, with a current rating of about 4 Amps going to be too big?) Rishi |
| Topic | Author | Date |
| Value and relevance of inductor | 01/01/70 00:00 | |
| What are you planning to do? | 01/01/70 00:00 | |
| Part of photoflash circuit | 01/01/70 00:00 | |
| On time ? | 01/01/70 00:00 | |
The reversal in voltage (AC) turns it off | 01/01/70 00:00 |