At 13:26 19.02.97 +0500, you wrote:
>hello piclisters,
>        i want to make a 20-300v power supply using PIC. the scheme i've
>thought upon relies on a SCR bridge, where the trigerring pulses for
>scrs will be generated by the PIC. the PIC should also communicate with
>Master processor over the I2C bus and accordingly adjust the timing so as to
>give the voltage (at the output of the bridge) as requested by the master.
>        can anybody help me in this regard ??
>thanx for your time.
>vishram.
>
Hi Vishram,

it sounds, that you should use a PIC16C74:
  a) hardware for pulse width modulation
  b) analog-to-digital converter for sensing
  c) I2C slave hardware for communication

regards

Wolfram



+-----------------------------------------------------+
| Wolfram Liebchen                                    |
| Forschungsinstitut fŸr Optik, TŸbingen, Deutschland |
| mailto:liebchen@ffo.fgan.de                         |
+-----------------------------------------------------+