Re: non-SMD alternative to a ESD5Z3.3T1G
No 3 phase service here
120v AC: +120v AC -> ground
240v AC: +120v AC -> -120v AC
evilkitty
Badcaps Veteran
Last Activity: 09-10-2023, 08:18 AM
Joined: 11-20-2017
Location: VA
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Re: Any idea what happened (wifi acted up)
have not opened it, IIRC it has security torx screws, i do have a ifixit manta kit so i should have whatever it is, but the hardware is still in service on switch duty, for all i know the wall wort is degrading and can no longer handle the power demand for wifi
multiple clients were affected (all of them) it is not a adapter issueLeave a comment:
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Re: non-SMD alternative to a ESD5Z3.3T1G
if that circuit is not so great what would you suggest? i can start from scratch at this point no problemLeave a comment:
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Re: Any idea what happened (wifi acted up)
same fw i installed the week it came out in 2015, affected all clients, some more resilient than others
the only thing i guess is the router's wifi failed in some horrible manor, i just turned the wireless off on it, now it is just acting as a 5 port gigabit switchLeave a comment:
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Any idea what happened (wifi acted up)
I have 2 access points, one a U6-LR and WZR-300HP running DD-WRT v3.0-r28444 (has had stable wifi since 2015)
and i am trying to work on my PICO W and it suddenly would not connect and my computer had a very hard time connecting and my dad had been complained about his phone connecting
so i ran a wifi scan script on the pico and it just hang for several seconds and found nothing, normally it would spit out every AP in under a second (both of mine and some neighbors)
What i did was just install a U6-Lite that i had not gotten around to installing to replace... -
non-SMD alternative to a ESD5Z3.3T1G
SMD part: [url]https://www.digikey.com/en/products/detail/onsemi/ESD5Z3-3T1G/1476607[/url]
i can't find anything with a 3.3v V VWM that is through hole (would prefer digikey cause i would like to also get some more/spare/test PICOs and combine shipping)
i would like to attach a variety of [URL="https://www.ebay.com/itm/154574442317"]current clamps[/URL] to a raspberry PICO via a ADS1115 to measure 15, 20, 30, and 100 A circuits
i found this schematic showing the part i want to replicate (the jack area on the left)
[url]https://docs.openenergymonitor.org/_images/schematic.png[/url]... -
Re: What resistors should i use for this circuit
yea only 8 wires for gpio as rather limiting... not sure if a mux IC would work with a variety of I/O types (also some of my stuff will be on different cores, and a everything on the mux chip would need to be on the same core)
my other 7 pins are allocated for use (fan, photocell, DHT22 data, DHT22 power, D18B20, LED, button)
[LIST][*]my DHT22s seem to glitch up and need to be power cycled[/LIST]
i could use hold times on the button for this... but i have interface preferences, and the MC-38...Last edited by evilkitty; 04-28-2023, 11:27 AM.Leave a comment:
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Re: What resistors should i use for this circuit
did you look how my override circuit works? that circut works by jumping the base to ground before the diode, that would be max current draw, if it gets to the transistor it would be lower, but at 1k ohm that is not a concern
anyway this is how my 2n2222a shows up on my tester, useful?
is there a way i can test for the hFE? figuring out the hFE is the part i do not understand in the base formula...Leave a comment:
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Re: What resistors should i use for this circuit
when a switch pulls the transistor base down it will 3.3v GPIO -> resistor -> ground that would be max current draw...Last edited by evilkitty; 04-28-2023, 08:08 AM.Leave a comment:
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Re: What resistors should i use for this circuit
Thanks, 27.5mA on the gpio pin... I'll go with a TIP120Leave a comment:
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What resistors should i use for this circuit
I have 2N2222A and TIP120 on hand, assuming my 2N2222As i got on ebay are complaint with the spec they should be fine for this having a max of 0.5A sustained and i have a [URL="https://www.onsemi.com/download/data-sheet/pdf/1n5817-d.pdf"]1n5817[/URL] forward voltage should be 0.32v
This circuit is for me light strip i use for my keyboard, where my PICO will control the light based on a photocell and my magnetic switch MC-38 will pull the base of the transistor to 0v if my keyboard tray is pushed in all the way, meanwhile i have my override switch, the switch has 6 pins i...Last edited by evilkitty; 04-27-2023, 10:37 AM. -
Re: Any recommended thermal epoxy?
The tube of stuff that came with my arctic mono plus was a single tube and the stuff is white, there was no branding on the tube itself
if you get the stuff a bit below freezing you can USUALLY break it off without ripping ICs off the PCB, dried stripes if you scrape them off are flexible
maybe this is the same stuff? [url]https://www.amazon.com/dp/B072MSXHJD[/url]Re: Any recommended thermal epoxy?<b..., there was noLast edited by evilkitty; 02-04-2023, 09:38 AM.Leave a comment:
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Re: Any recommended thermal epoxy?
[url]https://www.ebay.com/itm/234485591632[/url]
is this stuff any good?
looking for something i can get is less than 2 weeks (preferably less than 1)Re: Any recommended thermal epoxy?<b...y less than 1)Re: Any recommended thermal epoxy?
[url]https://www.ebay.com/itm/234485591632[/url]
is this stuff any good?
Leave a comment:
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Any recommended thermal epoxy?
What is something that is decent for gluing a heat sink to a IC's package (vram chip in this case)
by decent i mean a good price/performance ratio, not extremely expensive or horrible performance -
Re: resistor values for 2n2222a w/ SSR
I am using 2 relays, one is SPDT one is SPST (same model relay, but 1 pin is not used)
for the SPDT relay high is run and low is off, if you switch the slide switch the logic is inverted and the unit will change from being a heating unit to being a cooler, or vise versa
i am using the physical slide switch on the stock panel to set heat/cool/em. heat/off (also have a software off, but that will results in inf run time if the slide switch is set wrong)
the stock controller used mercury tubes, i used mechanical...Leave a comment:
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Re: resistor values for 2n2222a w/ SSR
the SPDT is NOT for my 120v mains bulb, that is for use in my thermostat (for the next time the relay fails), i only need SPST for the light bulb
my dad hates 3 way switches so i can't use them, the solution is to add a new light controlled via a relay, all i need to do it get my controller setup for that to be working, i got the bulb, fuse, and relay all wired, just need to program the pico, solder my transistor/resistor in place (and hook up my data inputs/sensors)
i was trying to think of a way to make it take longer...Leave a comment:
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Re: resistor values for 2n2222a w/ SSR
the relays are replacing the mercury tubes, the only job of the tubes is tell the unit if the temp is above/below the temperature it is set for, i would expect the unit to have any safeties it would need for when someone changes the temp settings at some random time, the only part of the thermostat i have modified is the temperature sensorLeave a comment:
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Re: resistor values for 2n2222a w/ SSR
just 5v songle relays i got for ~0.25 each
Are you talking about the board in the HVAC unit? if you are talking about inside my thermostat, i have VERY dumb (actually quite a clever design) but it was designed to not need any electronics[list][*][url]https://github.com/GM-Script-Writer-62850/Raspberry_Pi_Thermostat/blob/master/html/notes/Photo_DSCI0050.JPG[/url][/list]
my dad was complained saying the tubes were 'sticking' guessing there is some metal fatigue going on and it is not as accurate as it used...Last edited by evilkitty; 11-29-2022, 08:28 AM.Leave a comment:
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Re: resistor values for 2n2222a w/ SSR
This should work in theory, still not sure about about the resistor values, but there are some issues
[LIST][*]debug led has 1.95 fV, maybe i should just put 1 led in the 3.3v logic (or the 5v logic), with a mechanical relay i could just put it in parallel with the relay, but with a SSR i would only expect the device with a lowest forward voltage to turn on[*] not sure about resistor values[*]when logic goes high i think both relays will be on for a ~250ns[LIST][*]off-off is fine[*]on-on could be a issue, not sure if my HVAC cares but...Last edited by evilkitty; 11-28-2022, 12:56 PM.Leave a comment:
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Re: resistor values for 2n2222a w/ SSR
did not know that was a thing... well i have the relay installed and wired at this point and i can make the smartest auto light you have ever seen on my pico now (photocell, door sesnors/switch input as well as buttons at each door)
i want to make a SPDT out of 2 SSR relays for my thermostat that has had a few of those mechanical cheap blue relays die (so when the next one fails i can permanently fix it)
all i needed to know for the light switch problem was the base resistor value (Thanks redwire)...Leave a comment:
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