betwixt
Super Moderator
Home Page
Find latest posts
View Articles
View Blog EntriesMini Statistics
- Join Date
- 4th July 2009
- Last Activity
- Today 21:12
- 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
- abil10,
- ads-ee,
- akh_power,
- lhrz788,
- mantisYeYe,
- peeyushsigma,
- Simmiz,
- SunnySkyguy,
- thomasx,
- wondrous
- Tab Content
- betwixt's Activity
- About Me
- Friends
- Experience
-
Older Activity
-
Today, 21:12betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersTo be honest, I'm not sure what MUX_E1 is supposed to do. There is no need to disable all the CS signals, only to enable the one being used before...78 replies | 2056 view(s)
-
Today, 20:37betwixt replied to a thread Increasing oscillator output to almost rail to rail? in RF, Microwave, Antennas and OpticsDiode clipping just removes the top and/or bottom of the waveform, it doesn't increase the rise or fall time of the waveform. Your problem is simply...11 replies | 186 view(s)
-
Yesterday, 21:39betwixt replied to a thread Increasing oscillator output to almost rail to rail? in RF, Microwave, Antennas and OpticsI would doubt that solution would work - the diodes may well stop the oscillator running and in any case would clip the amplitude to ~0.5V when it...11 replies | 186 view(s)
-
Yesterday, 11:24betwixt replied to a thread Increasing oscillator output to almost rail to rail? in RF, Microwave, Antennas and OpticsIt won't work - the circuit uses C9/R2 to create a short 'spike' to clock the '165. It isn't the voltage levels that matter, it is the speed the...11 replies | 186 view(s)
-
Yesterday, 09:49betwixt replied to a thread Open collector output arduino with led with PLC inputs problem in Hobby Circuits and Small Projects ProblemsThose parts should be OK but you can use a smaller Schottky diode if you like, it will only carry a few mA at most so a signal type rather than power...5 replies | 289 view(s)
-
Yesterday, 09:43betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersThey are optional but I would fit them if possible. They should be as close to the Wroom as possible and be SMD or short wire through hole parts....78 replies | 2056 view(s)
-
20th February 2019, 09:36Well spotted Klaus - it should indeed by half a cycle, the next zero crossing when the triac turns off is only half the period I quoted. Brian.22 replies | 1463 view(s)
-
19th February 2019, 15:57betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersThe MAXIM data sheet explains the interface, it is basically SPI with no data input pin as the device is read only. The SCK is always an input to...78 replies | 2056 view(s)
-
19th February 2019, 12:06betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersYou only need one pull-up on each shared line. I'm not sure why you use the 74HC151 like that, to me it would make more sense to use a 3 to 8...78 replies | 2056 view(s)
-
19th February 2019, 09:38More information needed: Those motors only need sufficient AC voltage to make them turn, as long as you are using a reasonable frequency (50Hz or...3 replies | 134 view(s)
-
18th February 2019, 23:04betwixt replied to a thread Can anyone help with this Tesla coil? in Hobby Circuits and Small Projects ProblemsJust swap the connections to the thick black primary coil. Take the white wire and the green wire and connect them to the opposite ends of the black...3 replies | 150 view(s)
-
18th February 2019, 17:42betwixt replied to a thread Can anyone help with this Tesla coil? in Hobby Circuits and Small Projects ProblemsMost likely you have the primary winding the wrong way around. Try reversing the connections to the primary (transistor collector) side and see if...3 replies | 150 view(s)
-
18th February 2019, 09:22betwixt replied to a thread RF Transmitter - Pulsing sinusoidal wave @ 10.5K Hz. Pulsed every 36ms in RF, Microwave, Antennas and OpticsThat looks good. You have the wrong symbol for the MOSFET but we can see what you mean and the transistor I recommended is a 2N2222 not 2N222 but...7 replies | 301 view(s)
-
17th February 2019, 23:15betwixt replied to a thread RF Transmitter - Pulsing sinusoidal wave @ 10.5K Hz. Pulsed every 36ms in RF, Microwave, Antennas and OpticsThat is almost right. You need two more components, a resistor (10K will do) from the collector of 'SST' to +5V and a capacitor of about 1uF (not...7 replies | 301 view(s)
-
17th February 2019, 18:28betwixt replied to a thread RF Detector not detecting cellular phones in RF, Microwave, Antennas and OpticsMy apologies, it wasn't meant to be condescending. The point I was making is that at high frequencies, because the wavelength is shorter, the...24 replies | 811 view(s)
-
17th February 2019, 15:39betwixt replied to a thread RF Detector not detecting cellular phones in RF, Microwave, Antennas and OpticsFrom an RF point of view, that is a complete disaster. You really need to understand the concept of wavelengths then closely look at the tracks...24 replies | 811 view(s)
-
17th February 2019, 15:25We need to see the full code to be sure but as a guess I would say you have the watchdog timer enabled and are not resetting it. The result would be...4 replies | 165 view(s)
-
17th February 2019, 10:19I think the more important question is where does the 580V come from? But yes, it should be suitable otherwise. With the exception of thermal...2 replies | 143 view(s)
-
17th February 2019, 10:12betwixt replied to a thread Need to boost 10.5KHz RF transmission distance from 4" to ~25+' in RF, Microwave, Antennas and OpticsThe instructables design will never work efficiently because the current in the loop will be very small. Using whatever method you want to generate...1 replies | 156 view(s)
-
17th February 2019, 10:03betwixt replied to a thread RF Transmitter - Pulsing sinusoidal wave @ 10.5K Hz. Pulsed every 36ms in RF, Microwave, Antennas and OpticsPIC10F200 is the device number, it is an 8-pin microcontroller (or 6-pin in SMD package) and the smallest and simplest of all the Microchip MCU...7 replies | 301 view(s)
-
17th February 2019, 00:00betwixt replied to a thread ESD problem solved by using aluminium covered floor tiles? in Elementary Electronic QuestionsYour workbench is supposed to be grounded via 1M already. ...17 replies | 283 view(s)
-
16th February 2019, 22:50betwixt replied to a thread Turn on/off hall light with presence detection in Elementary Electronic QuestionsRFID fits all the requirements. All RFID tags have unique serial numbers which you can read so including or excluding a tag at point of entry is just...3 replies | 147 view(s)
-
16th February 2019, 22:37betwixt replied to a thread ESD problem solved by using aluminium covered floor tiles? in Elementary Electronic QuestionsLook at it this way: You make an all metal conductive floor and charge it up to 100KV, on it you place a workbench and on the workbench you place...17 replies | 283 view(s)
-
16th February 2019, 14:56betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersI'm not sure about the flash, you would have to look closely at the ESP8266 data sheet to see if the timing and page layout is compatible. The one on...78 replies | 2056 view(s)
-
16th February 2019, 10:12betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersBeing practical, I would first try some pre-assembled ESP8266 boards at high temperature. Yes, that crystal will work but the chances are one very...78 replies | 2056 view(s)
-
15th February 2019, 16:51betwixt replied to a thread [SOLVED] Thermal sensor of a FAN cooler: Needed to identify in Service Manuals, Requests, Repair TipsThe web site is http://www.tayao.com.tw but I can't see that exact model listed. Their catalog is a 17Mb download which would take ages here on my...2 replies | 338 view(s)
-
15th February 2019, 15:45betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersTrimmers are relatively expensive and require manual adjustment using a DVM to monitor the voltage. If it is necessary to cater for both batteries...78 replies | 2056 view(s)
-
15th February 2019, 10:25betwixt replied to a thread Embedded project needs devices which can work continuously at +125 degree C in MicrocontrollersYou probably don't need the potentiometers, the values are predictable so you should be able to use fixed resistors. I note you have no over-current...78 replies | 2056 view(s)
-
15th February 2019, 10:15It is quite likely the same device but pre-loaded in the factory with a specific program for Yamaha. Microchip provide a service where they provide...3 replies | 272 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
- 12,554
- Posts Per Day
- 3.57
General Information
- Last Activity
- Today 21:12
- Join Date
- 4th July 2009
- Home Page
- http://www.atv-projects.com
Helpful Postings
- Has Rated
- 6
- Post Rated
- Rated helpful 4170 out of 4170 times
Experience
Points
- Points
- 76,769
- Level
- 67
Level up completed
- Level up completed
- 58%
- Points required
- 981
Activity
- Activity
- 99.7%
- Activity last 30 days
- 99.7%
- Activity last 7 days
- 99.7%
Points
All Points for user
- Points for User
- 16,157
- Points for Reputation
- 12,528
- Points for every day since registration
- 3,623
- Points for Friends
- 6
All Points for threads
- Points for threads
- 2,382
- Points for Threads
- 99
- Points for Social Group Discussions
- 6
- Points for tagging threads
- 2,021
- Points for replies
- 256
All Points for posts
- Points for Posts
- 58,209
- Points for Posts
- 37,298
- Points for Social Group Messages
- 6
- Points for uploading Attachments
- 40
- Average Posts per Day
- 3.00
- Helpful Answers
- 20,865
All Points for miscellaneous
- Points for Misc
- 20
- Points for posting Calendar Event
- 20
Activities
22nd February 2019
- 03:06 betwixt has earned 4 Points for User points
- 03:06 betwixt has earned 22 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
21st February 2019
- 03:06 betwixt has earned 8 Points for Posts points
- 03:06 betwixt has earned 3 Points for User points
20th February 2019
- 03:06 betwixt has earned 6 Points for User points
- 03:06 betwixt has earned 24 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
19th February 2019
- 03:06 betwixt has earned 9 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
- 03:06 betwixt has earned 1 Points for User points
18th February 2019
- 03:05 betwixt has earned 4 Points for threads points
- 03:05 betwixt has earned 4 Points for User points
- 03:05 betwixt has earned 31 Points for Posts points
17th February 2019
- 03:06 betwixt has earned 7 Points for User points
- 03:06 betwixt has earned 30 Points for Posts points
- 03:06 betwixt has earned 1 Points for threads points
16th February 2019
- 03:06 betwixt has earned 20 Points for Posts points
- 03:06 betwixt has earned 2 Points for threads points
- 03:06 betwixt has earned 2 Points for User points
Show Activities from all Users