mata_haze
Well-known member
Hi everbody,
I have just stuffed mnats board with passive components (so no transistors FET or ICs) apart from the voltage regulator (7824) and the Zener diode.
I am using a 24-0-24 transformer (30VA) and I am getting good regulation out of the 7824 (around 30V) but I am not getting anything close enough to -10V on the zener output (iam actually getting 8.3V).
I am not using (for now as I am waiting for it to be delivered) tha suggested zener diode (which as far as I know is low impedance) but I am using a common BZX10C zener diode instead.
I have checked the resistors (R85-R86-R87-R88) although I have matched them using my multimeter and they all seem fine.
would that be the case where the zener is JUST NOT RIGHT or shall I start looking for something more detailed?
any suggestion will be more than welcome!
Many thanks,
Mattia.
I have just stuffed mnats board with passive components (so no transistors FET or ICs) apart from the voltage regulator (7824) and the Zener diode.
I am using a 24-0-24 transformer (30VA) and I am getting good regulation out of the 7824 (around 30V) but I am not getting anything close enough to -10V on the zener output (iam actually getting 8.3V).
I am not using (for now as I am waiting for it to be delivered) tha suggested zener diode (which as far as I know is low impedance) but I am using a common BZX10C zener diode instead.
I have checked the resistors (R85-R86-R87-R88) although I have matched them using my multimeter and they all seem fine.
would that be the case where the zener is JUST NOT RIGHT or shall I start looking for something more detailed?
any suggestion will be more than welcome!
Many thanks,
Mattia.