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Wireless alarm - long range
You can sometimes find Family Radio Service walkie talkies for a reasonable price. They SHOULD have the range you're interested in. I started a hack to do something similar (...
Sunday, 8 August 2021 - 04:15
Does my device needs an EFT test ?
Jim, when did EFT start. I retired in 06 and never heard of it. We did do the ESD stuff. There was a specified voltage and series R to use. Nastiest part of that one was that if...
Sunday, 1 August 2021 - 03:46
IR TV remote
I once built a arduino remote using a library from a fellow named Ken Shiriff. I'm not suggesting that you do that. But, maybe his code will give you some insight. https://github....
Sunday, 30 May 2021 - 04:24
US 3G EOL delayed
At my location, I'm bleeping lucky to get 1G :)   hj
Sunday, 14 March 2021 - 06:09
water heater energy logger
I'm sure that the OP will be thinking safety for this project. I don't know what the situation is in his location ( which somebody said was Canada), but I'm sure that there are...
Sunday, 7 March 2021 - 06:13
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

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