Hi,
I'm attempting to build a bench power supply for myself since I do not have one and I thought I'd build one of those before I try some more complicated projects. I'll be using an LM350T with a DP rotary switch to change the voltages (3.3, 5V, 9V, and 12V).
On the power supply end of things. I hear it is good common practice to use bleeder resistors after the main filter caps. I have never actually done so...but for something like this, I thought it might be a good place to try to implement them.
I've tried some calculators that have the time constant and voltage change etc. BUT, I'm not quite sure what these calculators accomplish. Is the value critical? My low electronics knowledge tells me that I should get a resistor with the least resistance, to avoid wasting too much power, but to get one with a high enough wattage rating so it can dissipate lots of stored power.
I believe I am going to use a 4700uF 25V bulk cap. Would a 0.22Ohm 5W work? I'm sorry I don't know how else to explain it, but I would appreciate any input.
Thanks.
I'm attempting to build a bench power supply for myself since I do not have one and I thought I'd build one of those before I try some more complicated projects. I'll be using an LM350T with a DP rotary switch to change the voltages (3.3, 5V, 9V, and 12V).
On the power supply end of things. I hear it is good common practice to use bleeder resistors after the main filter caps. I have never actually done so...but for something like this, I thought it might be a good place to try to implement them.
I've tried some calculators that have the time constant and voltage change etc. BUT, I'm not quite sure what these calculators accomplish. Is the value critical? My low electronics knowledge tells me that I should get a resistor with the least resistance, to avoid wasting too much power, but to get one with a high enough wattage rating so it can dissipate lots of stored power.
I believe I am going to use a 4700uF 25V bulk cap. Would a 0.22Ohm 5W work? I'm sorry I don't know how else to explain it, but I would appreciate any input.
Thanks.