21,164 reputation
12257
bio website n/a
location Toronto, Canada
age 40
visits member for 3 years, 11 months
seen 14 hours ago

c programmer, embedded dabbler, power supply tinkerer. (also loser of three consecutive moderator elections on EE.SE.)

[formerly known as 'madmanguruman' but shed that identity after a nice conversation with Olin Lathrop at Microchip MASTERS 2014.]

almost 15 years experience with switching power supplies at two different companies in the greater toronto area. worked my way from production technician to sustaining engineering, then product development (electrical and embedded). also fluent in vba and labview. currently studying project management theory while working as a power supply designer.


Aug
18
awarded  Nice Answer
Aug
14
revised PIC16F72 Unable to use all pins of PORTC
deleted 24 characters in body
Aug
14
comment PIC16F72 Unable to use all pins of PORTC
First, post your code and configuration bit settings. Obviously if the demo program is working there isn't a hardware issue - perhaps your configuration bit settings aren't disabling the Timer1 functions of the PORTC pins.
Aug
14
answered Inductor selection for a switching regulator
Aug
8
comment Linear Regulator: MOSFET vs BJT
Sounds like you don't use appropriate compensation - BTW snubbers are used for suppressing high-frequency switching noise, not in regulator control loops. There's nothing inherently wrong with using a MOSFET as a regulator.
Aug
8
comment Linear Regulator: MOSFET vs BJT
Anything with a feedback loop can oscillate very easily. Also please update your question if you specifically want to consider PMOS / PNP.
Aug
8
comment Linear Regulator: MOSFET vs BJT
Please elaborate on 'much more difficult to deal with them'. To me, controlling a series-pass MOSFET gate voltage is trivially easy with an op-amp.
Jul
30
reviewed Approve suggested edit on Neophyte question about AC vs. DC (especially for powering a home)
Jul
25
awarded  Popular Question
Jul
21
comment Why is it important for mains power supplies to be isolated?
I still would try a new question. This one is several years old and won't garner much attention.
Jul
21
comment Why is it important for mains power supplies to be isolated?
Grounding does not always imply earthing. My point talks about earthing, your question is about grounding. If you want to ask about grounding, pose a different question.
Jul
21
comment Why is it important for mains power supplies to be isolated?
Don't ask questions in comments - post them as new questions.
Jul
16
awarded  mosfet
Jul
6
comment Are more expensive parts worth it?
Field application engineer. Updated the answer.
Jul
6
revised Are more expensive parts worth it?
added 32 characters in body
Jun
23
awarded  Nice Answer
Jun
22
answered Are more expensive parts worth it?
Jun
22
revised Bootstrap Capacitor Selection with IR2110/3
edited body
Jun
19
comment Compensation of leakage reactance in high frequency transformer
I can't imagine you getting good coupling on a toroid with such a turns ratio. Please elaborate a little more on the application - what is the nature of the signal you're intending to transform (it is sinusoidal AC, chopped DC, etc.)
Jun
10
comment How to make a step down DC-DC converter fail safe?
@DaveTweed Seconded. Digitally controlled power is not a theoretical impossibility, it's effectively implemented already in hundreds of thousands (if not millions) of units already out there in the world, and can be easily implemented with a micro with good ADC and PWM resolutions. Furthermore, reasonable protection against a single-point failure for a step-down converter should be part of any rational design (just ask those people who do safety certifications for a living) and a series-pass element short is certainly a valid test condition.