betwixt
Super Moderator
Home Page
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 4th July 2009
- Last Activity
- Today 00:51
- Blog Entries
- 0
- Avatar
1 Groups
Join Groups 0 Permission Groups
betwixt is not a member of any public groups
Awards
2nd Helpful MemberAchievements
7 years registeredRecent Visitors
- ads-ee,
- joshuacp,
- lhrz788,
- peeyushsigma,
- RAHUL_KUMAR,
- removebackgroundcolor,
- swaroopadi,
- thomasx,
- Wajiduddaim,
- wondrous
- Tab Content
- betwixt's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
Yesterday, 22:39I would remove everything from the ISR except resetting the interrupt bit, capturing the received character to a variable and setting a flag to say...4 replies | 86 view(s)
-
Yesterday, 12:05betwixt replied to a thread How can you tell if big quantities of a component will be immediately available? in Elementary Electronic QuestionsAsk the manufacturer or distributor. They all have stock control limits and knowledge of 'end of life' periods. For a specific part that isn't used...3 replies | 144 view(s)
-
Yesterday, 11:5624V AC solenoids is a whole different ball game to 1.6V DC LEDS. I can't see any method using the switches alone and it seems all digital...10 replies | 246 view(s)
-
16th January 2019, 15:28betwixt replied to a thread Is there a safe way to fix this scratch on the hot side of PSU? in Power ElectronicsDell PSUs are no better or worse than every other make. Top picture: not much you can do to restore the original copper, I think I would run a...4 replies | 160 view(s)
-
16th January 2019, 15:18HardwareChap - can you give us more information please. Are the two coils part of a single inductor (magnetically coupled) or are they independent...3 replies | 104 view(s)
-
16th January 2019, 11:22betwixt replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsAgreed - and what are the 'J' references to? Brian.8 replies | 161 view(s)
-
16th January 2019, 11:151. remove R4 and R6 they serve no purpose, link the PIC directly to the '164. 2. read the HC164 data sheet, the input is clocked on the low to high...4 replies | 149 view(s)
-
16th January 2019, 11:01Circuit A will only work when the diodes are Zener types. Remember a Zener works like a normal diode in forward direction so the clamp voltage is...3 replies | 104 view(s)
-
16th January 2019, 09:41betwixt replied to a thread "IR based" relay driving problem in Hobby Circuits and Small Projects ProblemsNice idea but I doubt it will ever work. LDRs are sensitive to a far wider spectrum of light than you want and are also slow to react. A simple...6 replies | 140 view(s)
-
15th January 2019, 22:39I'm not laughing - honest. If kavin_eees will allow an analog solution it is very simple: add a series resistor to the whole feed to all the LEDs....10 replies | 246 view(s)
-
15th January 2019, 16:44I agree a NE555 would struggle to produce timing as long as that but the CMOS version might be able to. The timing would be very imprecise and...9 replies | 193 view(s)
-
15th January 2019, 16:34The LED logic is: 1. switch open, LED has no voltage across it, 2. switch closed, 10mA bypasses the LED so there may not be enough current. ...8 replies | 178 view(s)
-
15th January 2019, 16:25A further question: Do you want to do this using logic or an analog solution. If all the LEDs draw the same current there is a very simple way to...10 replies | 246 view(s)
-
15th January 2019, 10:44Only showing my age on the outside - I'm still a teenager inside :-D Brian.7 replies | 454 view(s)
-
15th January 2019, 10:39betwixt replied to a thread 230Vac pump drive with a microprocessor in Elementary Electronic QuestionsR44 isn't necessary and R3 may need a slightly lower value but otherwise it should work. Note that it may be advisable to add a snubber (33 Ohms and...1 replies | 86 view(s)
-
15th January 2019, 10:26betwixt replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsSo you propose something like the bottom image but made from two of the top image back-to-back with your own plastic insulator. Sounds...8 replies | 161 view(s)
-
14th January 2019, 22:43... I think that was just to detect zero crossing. However, using PIC PWM module usually implies a relatively fast PWM rate so unless this is a...10 replies | 321 view(s)
-
14th January 2019, 22:38betwixt replied to a thread MCPCB which is double sided and with plated through vias in Power ElectronicsQuestion: are you using double sided MCPCB (assuming that having a core means there is layer each side of it) or are you proposing two single sided...8 replies | 161 view(s)
-
14th January 2019, 15:07Typically, the pyro detector produces a small signal that is amplified and filtered by one or more op-amp stages then fed to a comparator. There will...6 replies | 167 view(s)
-
13th January 2019, 16:44betwixt replied to a thread Common mode noise and earth connections in offline SMPS in Power ElectronicsThe situation is similar to your crystal set thread where it is aptly described as like a one handed clap. A noise generator has to be between two...4 replies | 190 view(s)
-
13th January 2019, 16:21Could do with a clue here - is 'ENABLE' an input to this circuit or an output from it? Are you perhaps trying to gate the signal on RC0 so it only...17 replies | 421 view(s)
-
13th January 2019, 16:13I'm pretty sure I've got some NE-2 here in my box of ever ageing junk. Yes, I do remember them in counters and I think there was a commercial...7 replies | 454 view(s)
-
13th January 2019, 12:36Klaus, CCP1 is one of the capture or PWM output pins depending on configuration. In PWM mode it is an output, in CCP mode it effectively becomes a...10 replies | 321 view(s)
-
12th January 2019, 20:36betwixt replied to a thread Common mode noise and earth connections in offline SMPS in Power ElectronicsI think that would be the preferred way. However, you have to think of the unit as a whole, it may generate noise but how does it get out. If you...4 replies | 190 view(s)
-
12th January 2019, 20:30betwixt replied to a thread TO247 FET mounted in "SMD" fashion and pressurized against heatsink with "foam" in Thermal ManagementI disagree with both of you! It should be thermally insulating since it is only intended to put pressure against the tab, if it was conductive, and...6 replies | 383 view(s)
-
12th January 2019, 20:23betwixt replied to a thread "Crystal set" radio works only when connected to earth in Elementary Electronic QuestionsThink of the circuit as a 'floating' receiver, it doesn't care where it's signal comes from as long as it's there. What you did was attach an antenna...5 replies | 235 view(s)
-
12th January 2019, 10:33The same applies to all PICs, the pins can be inputs, outputs or tri-stated. If you are using any as an output and drive it high or low, it will have...18 replies | 739 view(s)
-
11th January 2019, 23:04... but beware that if you tri-state the pin (TRISx register) it is disconnected from the driver circuit inside the PIC so it will no longer pull the...18 replies | 739 view(s)
-
11th January 2019, 22:58Somewhat reminds me of a 'beeper' I can across a few months ago. It was a tone at about 1KHz pulsing at about 2Hz rate with apparently no active...7 replies | 454 view(s)
-
10th January 2019, 21:05Not quite. The voltage is brought within the range of the microcontroller by the potential divider R6/R8 and R7/R9, the amplifier is configured as a...4 replies | 460 view(s)
About betwixt
Basic Information
Optional Info
- Location:
- Aberdyfi, West Wales, UK
- Interests:
- Electronic design, TV production, photography, web site design
- Occupation:
- Retired senior engineer for a test equipment company but still very busy!
Signature
PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.
It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.
Contact
Statistics
Total Posts
- Total Posts
- 12,442
- Posts Per Day
- 3.57
General Information
- Last Activity
- Today 00:51
- Join Date
- 4th July 2009
- Home Page
- http://www.atv-projects.com
Helpful Postings
- Has Rated
- 6
- Post Rated
- Rated helpful 4129 out of 4129 times
Experience
Points
- Points
- 76,098
- Level
- 67
Level up completed
- Level up completed
- 29%
- Points required
- 1,652
Activity
- Activity
- 99.8%
- Activity last 30 days
- 99.8%
- Activity last 7 days
- 99.8%
Points
All Points for user
- Points for User
- 16,058
- Points for Reputation
- 12,446
- Points for every day since registration
- 3,606
- Points for Friends
- 6
All Points for threads
- Points for threads
- 2,334
- Points for Threads
- 99
- Points for Social Group Discussions
- 6
- Points for tagging threads
- 1,972
- Points for replies
- 256
All Points for posts
- Points for Posts
- 57,686
- Points for Posts
- 36,980
- Points for Social Group Messages
- 6
- Points for uploading Attachments
- 40
- Average Posts per Day
- 3.00
- Helpful Answers
- 20,660
All Points for miscellaneous
- Points for Misc
- 20
- Points for posting Calendar Event
- 20
Activities
18th January 2019
- 03:06 betwixt has earned 3 Points for User points
- 03:06 betwixt has earned 2 Points for threads points
- 03:06 betwixt has earned 14 Points for Posts points
17th January 2019
- 03:05 betwixt has earned 4 Points for User points
- 03:05 betwixt has earned 3 Points for threads points
- 03:05 betwixt has earned 28 Points for Posts points
16th January 2019
- 03:06 betwixt has earned 5 Points for User points
- 03:06 betwixt has earned 31 Points for Posts points
- 03:06 betwixt has earned 3 Points for threads points
15th January 2019
- 03:06 betwixt has earned 9 Points for Posts points
- 03:06 betwixt has earned 2 Points for threads points
14th January 2019
- 03:06 betwixt has earned 5 Points for User points
- 03:06 betwixt has earned 22 Points for Posts points
- 03:06 betwixt has earned 2 Points for threads points
13th January 2019
- 03:06 betwixt has earned 8 Points for User points
- 03:06 betwixt has earned 32 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
12th January 2019
- 03:06 betwixt has earned 5 Points for User points
- 03:06 betwixt has earned 16 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
Show Activities from all Users