Hello Forum,
I am not an electronics expert but I know some and I need some help with a problem I am having. I have a transformer tap of about 35 vac and after rectification I am getting about 46 vdc or so. I am trying to bring this down to somewhere between 30 and 33 vdc for a 7824 40vdc max. in voltage regulator. I have tried diodes-not much help, a couple of zeners-not much help and a dropping resistor not much help-only because the more the resistance climbs, the more the voltage climbs as well. BTW, I am trying to find the best way to do this on the test bench without frying my equipment or at least the 7824 ic. *Side note and engineer from the transformer company suggested that 3 or 4 1N4003's or a couple of 5w 5v zener diodes in series before the 7824 to bring it down to safe range but again, I am trying this on the test bench ahead of time BUT I don't know the total circuit resistance of the +24vdc circuit to recreate so I can test the engineers suggestion. I am lost and a little frustrated. Any help would be greatly appreciated.
Thanks in advance!
I am not an electronics expert but I know some and I need some help with a problem I am having. I have a transformer tap of about 35 vac and after rectification I am getting about 46 vdc or so. I am trying to bring this down to somewhere between 30 and 33 vdc for a 7824 40vdc max. in voltage regulator. I have tried diodes-not much help, a couple of zeners-not much help and a dropping resistor not much help-only because the more the resistance climbs, the more the voltage climbs as well. BTW, I am trying to find the best way to do this on the test bench without frying my equipment or at least the 7824 ic. *Side note and engineer from the transformer company suggested that 3 or 4 1N4003's or a couple of 5w 5v zener diodes in series before the 7824 to bring it down to safe range but again, I am trying this on the test bench ahead of time BUT I don't know the total circuit resistance of the +24vdc circuit to recreate so I can test the engineers suggestion. I am lost and a little frustrated. Any help would be greatly appreciated.
Thanks in advance!