Post Created date
water level conductive test
I once prototyped a capacitive sensor -- worked OK, but I couldn't use it because the actual application ( auto coolant level in the overflow tank)as the tank was too deeply...
Sunday, 6 September 2020 - 04:53
Suggest a good scope?
Me too, I've used several of the Rigol digital scopes, nice units, it did take me a while to get used to the trigger being in the middle of the screen  All this time I...
Sunday, 6 September 2020 - 04:25
Do RFID tags wear out?
Years ago I worked on projects with RF tags and later rfid TAGS.   RF tags were made up of a coil and capacitor -- you could detect that a tag or tags was in the detection...
Sunday, 7 June 2020 - 05:12
key fob batteries
Couldn't finish the vid - soldering was too painful. Even I can do better. Probably would have cut the leads and used a solder sucker or just tapped them out.   Don't know...
Sunday, 24 May 2020 - 05:02
Efficiencies in Radio Amateur (2)
trying to unsubscribe   hj
Tuesday, 3 March 2020 - 17:41
Efficiencies in Radio Amateur (2)
I had a couple of crystal sets as a boy -- they sold them as toys at the time. We had a local station with their antenna about 10 miles from the house -- picked them up well --...
Sunday, 9 February 2020 - 06:17
suppress surge at the source on 120 vac house circuit ?
Could be something as simple as a crappy connection or breaker upstram from the light and printer circuits. Best test would be to do a voltage and current check diring startup --...
Sunday, 6 October 2019 - 04:39
Old Scopes Linger
Not saying you're wrong avrc -- but you might be. Sometimes the devil is in the details. The products may look the same, but be vastly different. For instance, the switches and...
Sunday, 14 July 2019 - 04:50
Measuring EC for hydroponics
Is that a metric bagel? hj
Sunday, 14 July 2019 - 04:16
Can you tap USB comm
OK, but how about this -- I just want serial data.   Could I take 4 USB to serial cables?  - Cables  1 and 2 connect together betrween my USB devices - Cable 3...
Sunday, 2 June 2019 - 04:43
better way to do this?
Thanks for the plethora of comments. I apologize for the poor post.  A coworker once referred to me as a dyslexic typist -- and it's pretty true.   foo ( not its real...
Friday, 31 May 2019 - 04:32
Solved: Can SN74HC595N replace TC74HC595AP?
Well, you can't be too careful, but generally digital ICs with the same generic part number have the same specs. The extra letters/numbers  spec things like package type and...
Sunday, 14 April 2019 - 04:53