Today's Update:
Today I Completed the kit and testing was done. At first start it did not go well, I really got depressed, only the True DIY'ers who built right from developing PCB board to assembly can understand this feeling of depression...(the thoughts in mind, like let it be a small problem....kaash yeh mehanet doobara na karni pade) sorry for those Hindi words.
Then made a quick check & found i had reversed the polarity of 47uf Cap & told myself let this be the alone problem other then wrong tracks.. So I quickly change the Polarity & the pcb was on the test bench again & this time it was Success.
On testing i found the Green LED flicker rate was too fast, so i searched again in diyaudio forum & found the solution (i changed the 470 Ohms resistor to 2.7K & increased the value of Capacitors from 2.2uf to 10uf) now the flicker rate was visible. With addition to this I also found the DC cut off Voltage rating for this PCB, It was about 9 Volts. 9VDC in my opinion will be too Big Value for Home Use so reading further i found the Resistor values which Operates the Relays at 3VDC and i thought this value will be good for setting the DC voltage. (here i changed the 27k resistors to 18k)
Now after above modifications i did a quick DC test by using the Motor Speed Controller, there is POT, which on rotating increases the DC Voltage. At about 2.5 to 2.8 V the Relays were steady, at 3 volts to 4.5 volts the relays operated (but took about a half sec or so, above 4.5 VDC i think the relays operated within or close to 10 to 15 milli sec, I Dont have an Idea about acceptable time limit within which the realys should operate.
Below is the Photo of PCB Powered on:
Regards,
Sadik