treez
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Yesterday, 23:07treez replied to a thread LTspice...splitting LT1243 output into two separate pulse streams in PCB Routing Schematic Layout software and SimulationThanks yes thats right......but i can put a ramp into the Current sense input from the clock pin....and thus do it in voltage mode.....with some...9 replies | 211 view(s) -
Yesterday, 19:05treez replied to a thread LTspice...splitting LT1243 output into two separate pulse streams in PCB Routing Schematic Layout software and SimulationThanks , this is purely for sim purposes to look at checking sims for the transformer turns checking. Thankyou Klaus you are a genius as...9 replies | 211 view(s)
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Yesterday, 16:44treez replied to a thread LTspice...splitting LT1243 output into two separate pulse streams in PCB Routing Schematic Layout software and SimulationThanks, yes, i have to get "-1" because the switch only responds to "+1" and "-1" for "ON" and "OFF" respectively Yes i think i need a delay to...9 replies | 211 view(s)
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Yesterday, 16:02treez replied to a thread LTspice...splitting LT1243 output into two separate pulse streams in PCB Routing Schematic Layout software and SimulationThanks, this is purely sim and we wish to use the LT1243 as its so quik and eazy to use. The attached (LTspice and schem) shows how it can be...9 replies | 211 view(s)
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Yesterday, 14:14treez started a thread LTspice...splitting LT1243 output into two separate pulse streams in PCB Routing Schematic Layout software and SimulationHi, I wish to simulate a Half Bridge SMPS in LTspice, but using the LT1243 adapted to control it. I need to split the gate drive in to two separate...9 replies | 211 view(s)
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Yesterday, 12:47treez replied to a thread PFC controller datasheets do not tell you that they need to damp LC filter ringing? in Power Electronics…thanks, it may well be that, but if it is, then that means it isn’t possible to do a PFC’d Buck converter without getting this ringing…because they...2 replies | 305 view(s)
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Yesterday, 12:32treez replied to a thread Grid tied inverters will result in high mains voltages above 300VAC..do you agree? in Elementary Electronic QuestionsThanks, I actually wonder where the threshold is set for turn OFF of an inverter….i mean, “normal” mains voltage is permitted to go up to 265VAC...5 replies | 190 view(s)
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Yesterday, 12:24woops sorry..here it is10 replies | 385 view(s)
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Yesterday, 00:54treez replied to a thread Grid tied inverters will result in high mains voltages above 300VAC..do you agree? in Elementary Electronic QuestionsI believe the overvoltages would be more common over short time ranges of up to 10 milliseconds or so.....because the GTIs would quickly sense the...5 replies | 190 view(s)
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8th December 2019, 22:50treez started a thread Grid tied inverters will result in high mains voltages above 300VAC..do you agree? in Elementary Electronic QuestionsWhen a grid tied inverter (from a solar fed battery) is connected to the mains, it senses the mains voltage and disconnects if the mains voltage...5 replies | 190 view(s)
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8th December 2019, 18:02Please read the attached6 replies | 414 view(s)
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8th December 2019, 12:06here is some help with layout, which you also requested10 replies | 385 view(s)
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8th December 2019, 02:26treez started a thread PFC controller datasheets do not tell you that they need to damp LC filter ringing? in Power ElectronicsHi Why is it that PFC controller datasheets don’t tell you that they all have a facility to damp the LC filter ringing near the mains zero...2 replies | 305 view(s)
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8th December 2019, 01:24treez started a thread Flyback SMPS constant off time controller with PIC micro? in MicrocontrollersHi, We wish to program the PIC16F176X micro to be a constant off time controller for a Current mode Flyback SMPS. Please could you say if this is...0 replies | 97 view(s)
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30th November 2019, 17:23treez replied to a thread Opamp buffer with 400nF output capacitance going unstable? in Elementary Electronic QuestionsThanks, yes I believe there is a real threat of instability here. Please could you check if the following would be unstable? (schematic attached) I...15 replies | 813 view(s)
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29th November 2019, 13:39treez replied to a thread Opamp buffer with 400nF output capacitance going unstable? in Elementary Electronic QuestionsJust to note, I’ve just actually wired in 51.7uF of capacitance in parallel with C2, and its still not gone unstable. (11 pieces of 4u7, 0805,...15 replies | 813 view(s)
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27th November 2019, 21:42treez replied to a thread Opamp buffer with 400nF output capacitance going unstable? in Elementary Electronic QuestionsThanks, I will read about “in loop compensation” etc, it sounds good. Today I actually addressed our contractor, and tried to talk him out of the...15 replies | 813 view(s)
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27th November 2019, 07:25treez replied to a thread Opamp buffer with 400nF output capacitance going unstable? in Elementary Electronic QuestionsThanks, actually there is some requirement for the opamp to sink current some of the time. 15mA was just an average figure. What would you say is...15 replies | 813 view(s)
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26th November 2019, 21:43treez started a thread Opamp buffer with 400nF output capacitance going unstable? in Elementary Electronic QuestionsHi We wish to have this 8V3 Regulator. (attached) Do you think the amount of output capacitance will make the MIC6211 opamp go unstable? MIC6211...15 replies | 813 view(s)
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25th November 2019, 21:01treez replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power ElectronicsThanks, yes you are right, controlling temperature by controlling the flow rate appears to be the main method....but it is a poor method....just...28 replies | 1276 view(s)
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24th November 2019, 20:47treez started a thread Do you know the efficiency vs output load for this dcdc module? in Miscellaneous Engineeringhttps://www.cui.com/product/resource/pds1-m.pdf ..the datasheet doesnt say. It only says "up to 82%" Its the PDS1-S12-D15-M one ...1 replies | 559 view(s)
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24th November 2019, 19:52treez replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power ElectronicsHaving re-looked at the shower of post #21, I now agree with your words. It’s the flow rate that is being adjusted to give a wide range of...28 replies | 1276 view(s)
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24th November 2019, 14:50treez replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power ElectronicsThanks, I also read the manual. There are three flow settings. Then there’s the temperature dial for you to increase/decrease temperature with...28 replies | 1276 view(s)
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24th November 2019, 14:10treez replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power Electronicssorry Betwixt, i should have made clear that i am only speaking of "electric showers" here.....you are kindly referring to whats known in shower...28 replies | 1276 view(s)
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24th November 2019, 11:52treez replied to a thread Regulating temperature of mains connected heating element: Skipping mains half cycles in Power ElectronicsInterestingly, The following electric shower.. https://www.mirashowers.co.uk/showers/electric-showers/mira-decor-dual-108kw/ ..has an extremely...28 replies | 1276 view(s)
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23rd November 2019, 21:28treez replied to a thread PIC1F1508 with four PWM outputs operating at different frequency? in MicrocontrollersThanks, oh no, we need some to be slower than others, thats why i was hoping that one of the pwm streams can have like a software flip flop put with...4 replies | 340 view(s)
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23rd November 2019, 16:46treez started a thread PIC1F1508 with four PWM outputs operating at different frequency? in MicrocontrollersPage 252 of the PIC16F1508 datasheet suggests that the four PWM outputs of the PIC16F1508 must all be the same frequency. However, is their some way...4 replies | 340 view(s)
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20th November 2019, 07:25treez replied to a thread Mains harmonic emissions for dimmable offline LED drivers. in Power ElectronicsThanks i see what you mean and agree. This does appear to be a mistake in the regulations though.......i mean, the customer may only need 25W at a...15 replies | 853 view(s)
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19th November 2019, 20:43treez replied to a thread Mains harmonic emissions for dimmable offline LED drivers. in Power ElectronicsAs discussed, the Class C regulations require conformance all the way down to 25W. However, as I have remarked, its not economically feasible to ...15 replies | 853 view(s)
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19th November 2019, 07:31treez replied to a thread Mains harmonic emissions for dimmable offline LED drivers. in Power ElectronicsOK thanks, ill look into adapting it for opto-isolated feedback.15 replies | 853 view(s)
About treez
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- April 5, 1982 (37)
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- cyclist
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