Technická dokumentace https://wiki.spoje.net/ 2026-04-30T18:13:00+00:00 https://wiki.spoje.net/ https://wiki.spoje.net/lib/exe/fetch.php/wiki/dokuwiki.svg text/html 2016-04-07T15:37:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/1-wire?rev=1460043423&do=diff 1-Wire MicroLAN Sensor Network Prevodniky DS9490R lsusb: ID 04fa:2490 Dallas Semiconductor DS1490F 2-in-1 Fob, 1-Wire adapter RS232 <http://www.root.cz/clanky/internetovy-termostat-stavba-site-teplotnich-cidel-na-1-wire-sbernici/> Sensory DS18B20 How to tell fake DS18B20 from original Test Original chinese fake note Diode test text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/active_softstart?rev=1477775108&do=diff Active Softstart for Welders This covers softstart circuit designed especially for upgrade of cheap MIG/MAG transformer welder. Problem * Welder triggers the 16A/B circuit breaker during switch-on phase (when the torch trigger is pressed) * This is caused by inrush current spike before transformer core get magnetized text/html 2018-11-14T17:05:39+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/arduino?rev=1542215139&do=diff Arduino, ESP32, IoT OTA * avahi-browse _arduino._tcp --resolve --parsable --terminate autodiscover OTA capable arduino/esp devices * avahi-resolve -n esptest.local find IP address of OTA device with known hostname * Arduino IDE -> Sketch -> Export compiled binary = Create .bin file in project directory text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/audio_over_ethernet?rev=1477775108&do=diff AoE: Audio over Ethernet It's easy to modify CAT3 ethernet couplers to be used for ghetto audio signal distribution over pre-existing ethernet cables :-) Probably not for complete audiophiles, but for me it works very well. Just crack-open the CAT3 coupler and you'll find that small cheap panel-mount 3.5mm stereo jack will fit right in. Then you just need to find and solder proper wires: text/html 2022-12-12T16:09:55+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/batteries?rev=1670861395&do=diff Rechargeable Batteries * List_of_battery_sizes Important voltages Important voltages for various battery chemistries (mostly based on wikipedia articles). Nickel, Lithium Ni-MH Ni-Cd Li-ion Li-Po LiFePO4 nominal (1 cell) 1.2 1.2 3.7 (NMC 3.6) 3.7 text/html 2015-03-10T13:04:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/converters_regulators?rev=1425992692&do=diff Měniče, regulátory a napájení obecně 78xx lineární regulátor <http://www.8bitu.cz/clanek/stabilizator-78xx-a-79xx/> Regulátor napětí (osobně oba ty kondenzátory zásadně vynechávám, protože nějaká ta kapacita se někde vždycky najde, ale psst :-) Zdroj konstatního proudu (pro LEDky, lasery, text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/desulphator?rev=1477775108&do=diff Battery Desulphator This device is claimed to revive various kinds of old and dead batteries using constant pulsed current. Initial design * <http://screwdecaf.cx/dapimp.html> * <http://hackaday.com/2012/05/19/geeks-living-off-the-grid-are-hard-on-batteries/> Shock hazard!Rechargeable Batteries My improvements I am experimenting with several design modifications to provide better pulses to desulphate batteries. text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/ethernet_surge_protection?rev=1477775108&do=diff Surge Protection on Ethernet * <https://www.bourns.com/pdfs/bourns_ethernet_poe_article.pdf> * <http://www.akrossilicon.com/home/component/jdownloads/finish/3-whitepapers/29-ethernet-esd-compliance-w-as1602-wp12-rev1-3-pdf> PCB Spark Gaps * <http://www.youtube.com/watch?v=vfP_65gSSBU> * Breakdown voltage = (3000 * air_pressure_atm * distance_mm) + 1350 * 0.1mm = 1650V * 0.2mm = 1950V text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/fm_transmitter_takems?rev=1477775108&do=diff FM Transmitter takeMS <http://show.harvie.cz/disassembly/takeMS_FM_Transmitter/IM000129.JPG> * <http://blog.harvie.cz/2008/02/gadgety-a-hardware/fm-transmitter-takems/> * <http://show.harvie.cz/disassembly/takeMS_FM_Transmitter/> TX Power mod * inspirace * <http://www.pira.cz/belkin.htm> * <http://www.pira.cz/belkin2.htm> <http://show.harvie.cz/disassembly/takeMS_FM_Transmitter/TakeMS-FM-Transmitter-Mod.jpg> text/html 2014-12-11T16:20:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/gigabit_poe?rev=1418314842&do=diff Gigabit PoE (802.3af) * <http://en.wikipedia.org/wiki/Power_over_Ethernet#Power_capacity_limits> * <http://forum.mikrotik.com/download/file.php?id=10417&sid=6fc2e8eb2c2daca423ee4b91e19a1405> * <http://www.dipolnet.cz/poe_-_iee_802_3af_and_iee_802_3at_bib746.htm> * C = 100nF (ceramic, stacked tin foil,...) * L = 300uH * Ferrite material 43 or 61 (toroid FT-37-61) * <https://www.youtube.com/watch?v=t8mB6xz2NPI> Experiments * I've decoupled all of 8 gigabit ethernet condu… text/html 2014-03-25T07:21:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/heat_dissipation?rev=1395732086&do=diff Tepelné ztráty * <http://www.diystompboxes.com/smfforum/index.php?topic=77110.0;wap2> * <http://hackaday.com/2014/03/03/hot-or-not-find-out-how-to-calculate-component-heat-and-why-you-should/> text/html 2017-11-18T09:48:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/mqtt?rev=1510998500&do=diff MQTT Mosquitto * Prihlasime se na serveru k odberu vsech podtopicu harvie * mosquitto_sub -h iot.siliconhill.cz -p 1883 -v -t harvie/# * Ve druhym okne posleme zpravu do topicu harvie/test * mosquitto_pub -h iot.siliconhill.cz -p 1883 -t harvie/test -m "hello world!" text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/netprotector?rev=1477775108&do=diff NetProtector * <http://cdr.pl/p4455,netprotector-8p-poe-gigabit-npg-8p.html> * Vyrobce: cyberteam.pl Parametry * Input: 12-54V DC * Maximalni odber na port: 1.4A * Rozmery: 130mm x 146mm x 33mm text/html 2014-10-22T18:24:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/op-amps?rev=1414002256&do=diff Operační zesilovače Unity gain, audio, asymetrical supply 3 band tone correction audio equalizer text/html 2023-09-01T11:46:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/parts?rev=1693568805&do=diff Nejběžnější elektronické součástky List of jellybean electronic components. Tady si udržuji seznam nejběžnějších elektronických součástek. Většina z nich má velmi široké využití v mnoha obvodech. Seznam se hodí pro připomenutí, když máme na stole součástku a nevíme co je zač. Také je možné se tohoto seznamu zhruba držet při zařizování elektrodílny a udržování zásob základních součástek. Některé běžné součástky však na seznamu chybí a naopak se na něm vyskytují i některé méně běžné, které sice p… text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/prodluzovacka?rev=1477775108&do=diff Prodlužovačka ... aneb proč je dobré rozmotat celou prodlužovačku, i když nevyužijeme její celou délku ... * Vždy prodlužovačku rozmotejte celou ! * Snažte se používat prodlužovačku s tepelnou pojistkou (dojde k odpojení dřív než k případnému požáru) text/html 2018-09-23T19:45:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/realizace?rev=1537731957&do=diff Realizace elektronických obvodů Tipy pro realizaci * NASA Workmanship Standards * Na SMD footprint pro pasivy rozmeru 0805 by se udajne mela vejit vetsina velikosti smd soucastek Dekódování hodnot komponent <http://www.mds975.co.uk/Content/components01.html> Jak se zbavit Arduina <http://www.youtube.com/watch?v=30rPt802n1k> Toner transfer Za studena text/html 2014-09-25T08:08:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/reverse_engineering?rev=1411632490&do=diff Reverzní inženýrství Tady jsou nejaky informace z rozborek Solární regulátor CMP 12/24 2012-06-09 version 8.3 <http://solar-nm.blogspot.de/2012/11/closer-look-at-cmp-1224-solar-charge.html> 2010-10-25 version 1 <http://techluck.com/cgi-bin/YaBB.pl?num=1313110955> Juta CMP12 <http://www.abcelectronique.com/forum/showthread.php?t=76249> Napájení pro Behringer Eurorack <http://connectedweb.wordpress.com/2013/07/16/the-power-supply-of-behringer-xenyx-802-and-eurorack-ub802-ub502-ub… text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/rs232_over_ethernet?rev=1477775108&do=diff RS232 over Ethernet (Cisco serial console, RJ45 konzole) * <http://www.cisco.com/c/en/us/support/docs/routers/7000-series-routers/12223-14.html> * <http://www.instructables.com/id/Simple-RJ45-DB9-Cisco-console-cable/> * <http://www.cyberflunk.com/~nikm/cisco/cisco-de9/> RJ45 CAT5 Color DE9 RS232 DE9 Color 1 orange-white 8 CTS Clear to send Blue 2 orange 6 DSR Data set ready Orange text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/smd_beginners?rev=1477775108&do=diff SMD for Beginners Here is mirrored 1200dpi PCB template for simple SMD 555 led flasher ready for toner transfer: I was mostly using 1206 footprints as most parts will fit this size and it's still posible to comfortably route between legs. 0805 is also quite universal if you design PCB. For capacitors i've used "C 6032" footprint just because i've had some slightly bigger caps at the hand, but it can also take much smaller capacitors, when populated by hand. text/html 2015-06-07T14:53:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/smd_breakout_boards?rev=1433688837&do=diff SMD Breakout Boards * <http://hackaday.com/2010/04/29/surface-mount-breakout-boards/> * <http://www.mikrocontroller.net/articles/SMD_2_Steckbrett_Adapter> * <http://www.imajeenyus.com/electronics/20110805_smd_adapter_boards/index.shtml> * <http://www.thingiverse.com/thing:1904> 20-PIN SOIC to DIP 28-pin SSOP to DIP [Thanks Paul Dekker] SOIC8 (1200dpi) SDIP30 to 100 mil text/html 2016-03-16T01:44:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/soldering?rev=1458092655&do=diff Pájení Před pájením dvou součástek k sobě je vhodné na ně po odizolování nejdříve nanést kalafunu a následně je pocínovat a dobře prohřát. Obě součástky kvalitně smočené v cínu je pak již snadné k sobě pevně připájet. text/html 2024-04-21T17:35:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/supercapacitor?rev=1713720933&do=diff Supercapacitor experiments Greencap 16V 83F (6x 2.7V 500F) Each cap can handle 2.7V long term, 2.85V short term. Balancer starts discharging overcharged caps through 1 ohm power resistor once they overshoot 2.8 - 2.85 V. Self discharge current is expected to stabilize at relatively low value after 100 hours of being charged. text/html 2015-03-06T22:25:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/unreadable_ic_labels?rev=1425680758&do=diff Unreadable IC labels <https://electronics.stackexchange.com/questions/5186/how-to-read-the-text-printed-on-top-of-every-ic> White marker Chalk 1. Clean up the text with a cotton swab dipped in rubbing alcohol. 2. Wait for the alcohol to evaporate and rub yellow or white chalk on markings. 3. Wipe gently with a cotton swab and bingo! text/html 2015-12-02T17:25:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/ups?rev=1449077149&do=diff UPS Velký test zálohovaných průmyslových zdrojů. DC Mean Well * jen jedna ledka = DC výstup * trimr na kalibraci model nominální voltáž wattáž DC výstup nabíjení vypínání vstup start z baterky AD-55B 24V 55W 27.6V (1.8A) (22.7-31.9V) text/html 2016-10-29T21:05:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/usb_poe?rev=1477775108&do=diff USB PoE Step-up Converter We use step-up converters built into the ethernet socket to power up PoE enabled 5GHz WiFi gear using power from laptops' USB. This can be used for in-field signal testing. We use it mostly with Mikrotik and Ubiquiti devices, which need only 8V to function properly, so we use step-up to convert 5V from USB to suitable 9V. In all cases i've tested, single USB port was enough to power all tested devices (even when my calculations didn't said so). However you can still ad… text/html 2014-04-08T18:55:18+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.spoje.net/doku.php/howto/electro/useful_circuits?rev=1396983318&do=diff Referenční obvody * Měniče, regulátory a napájení obecně