View source for Electronics

=projects=
==log==
4/28/22
*check voltage drop 5v->LED->220->gnd  When a pin on the nodemcu is connected to ground (or a voltage under .8 volts) it will return 0, and when it is exposed to a voltage over 2.4 volts it will return high.  Anywhere in between .8 and 2.4 and you won’t reliably be able to predict the pin reading. 
*LED voltage drop white:2.8v, green:1.9v, yellow:1.9v, red:1.8v

==[[:cascada 2.0]]==
==secstidif HTU12D temp/humidity sensor==
using HiLetgo HTU21D Temperature Humidity Sensor with Adafruit HTU21DF Library by Adafruit.used in:
* attic temp_hum sensor CYURD118
* master bedroom greenhouse CYURD004


{{:hvac}}
{{:timecards}}
===future===

conversion calculator
 liters to cups or ounces, cups in fractions available on measuring cup

 (.75/3)L = ?c?o

==circuit boards==
===cascada===
[[File:CascadaPCB.png]]
==esp8266-700ma-1out-1in==
[[File:E82 700ma 1in 1out.png]]
[[File:E82 700ma 1in 1out_sch.png]]
{{:ecurriculum}}

{{:parts index}}

==lcd displays==
http://www.inexglobal.com/downloads/glcd5110.pdf
https://www.sparkfun.com/products/10168
https://learn.sparkfun.com/tutorials/graphic-lcd-hookup-guide?_ga=2.247577219.589590858.1580362058-965733284.1569446725

==date/time==
*https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
*https://github.com/abritinthebay/datejs
*https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTimezoneOffset
*http://momentjs.com/timezone
*https://developers.google.com/maps/documentation/timezone/usage-limits#standard-usage-limits

===timers===
*http://www.switchdoc.com/2015/10/iot-esp8266-timer-tutorial-arduino-ide/
*http://www.pjrc.com/teensy/td_libs_Time.html
*http://www.pjrc.com/teensy/td_libs_TimeAlarms.html
*https://github.com/Toshik/TickerScheduler

==line voltage==
*[http://electronicdesign.com/test-amp-measurement/simple-circuit-measures-v-i-phase-displacement AC phase diplacement]
{{:arduino}}
{{:iot}}
{{:mqtt}}
{{:breakout boards}}
[http://circuitlab.com circuitlab] mcktimo 6j

=[[projects in process]]=
===solar water valve===
Control a 12v water valve powered by solar. When the sun is shining enough it wakes up the processor which hooks itself to wifi and figures what it should do. INREALITY 12v solar panel doesn't have enough power to open a 12v solenoid (needs nore than .6amps)

http://www.electronicdesign.com/analog/what-s-all-solenoid-driver-stuff-anyhow

https://www.edn.com/design/analog/4399713/Booster-circuit-enables-reliable-solenoid-operation-

http://www.sunrise-ev.com/LeesEVs.htm

http://solarbotics.net/library/circuits/se_t1_zener.html

https://rayshobby.net/minty-water-valve-controller/

===[[water control project]]===
{{:water control project-desc}}
===[[online heating system control project]]===
{{:online heating system control project-desc}}

==[[pic]]==
==schematics, circuits, projects==
::[http://www.satsleuth.com/schematics.htm collection of schematics]
::[http://www.craig.copperleife.com/tech/thermo/ Craig's thermostat circuits]
::[http://www.nateful.com/differduino/differduino.html Solar differential controller (diffarduino)]
==parts==
===needed parts (next order)===
*thermistors
*5K and 10K POTS
===[http://dx.com dx.com]===
===[https://www.sparkfun.com/products/10524 atmel 328 $5.50 arduino] [http://www.browndoggadgets.com/products/atmega328-with-arduino-optiboot atmel 328 $3.50]===
ATmega328 with Arduino Optiboot (Uno)DEV-10524 Description: The name says it all on this one. An ATmega328 in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board. To get this chip working with Arduino IDE, you will need an external 16MHz crystal or resonator

=====[http://www.maximintegrated.com/datasheet/index.mvp/id/2735 DS1620 Digital Thermometer and Thermostat]=====
In a [http://www.rentron.com/project01.htm thermostat circuit]
{{:DS18B20 Maxim 1-wire temperature sensors}}

===[https://www.sparkfun.com/products/10168 Graphic LCD 84x48 - Nokia 5110]===
::[https://www.sparkfun.com/products/10168 Graphic LCD 84x48 - Nokia 5110] runs on 3.3v so you have to [http://www.sparkfun.com/tutorials/65 interface] carefully

===KTM-S1201 lcd module===
::http://arduino.cc/forum/index.php/topic,22098.0.html
===DK-duino DKUNO Atmega328p-20PU USB Board===

http://i1017.photobucket.com/albums/af297/oldbanian/cegoot001.jpg
 

Descriptions

Compatible with [http://www.arduino.cc/en/Main/ArduinoBoardDuemilanove Arduino duemilanove 2009]
Microcontroller: ATmega328P-PU
USB to RS232 Controller: PL2303HX
I/O compatible with Arduino UNO R3
Operating Voltage (logic level) : 5V
Input Voltage (recommended) : 7.2-11.1V
Input Voltage (limits) : 6-20V
Package Content

1*DK-duino DKUNO Atmega328p-20PU USB Board
1* USB 2.0 cable

===Ethernet Shield With Wiznet W5100 Ethernet Chip ===
( latest version )
Compatible Duemilanove (168/328) / Mega (1280/2560) / UNO
 
http://solderpad.com/solderpad/arduino-ethernet-shield/photo/m.jpg
 
 Product Description
 
      This is the latest version  of the Ethernet Shield. This Arduino Ethernet Shield which is based on the Wiznet W5100 Ethernet Chip gives you an easy way to get your Arduino Online. It is directly supported by Arduino official Ethernet Library. It adds a micro-SD card slot, which can be used to store files for serving over the network. It is compatible with the Arduino Duemilanove (168 or 328), Uno as well as Mega (1280/2560) and can be accessed using the SD library.
The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield.

==[[6002]]==
==circuits==
===countdown timer relay===
[http://electronickits.com/kit/complete/elec/ck1611.pdf countdown timer]
{{:MPPT charge circuit}}
{{:12vdc-5vdc step down converter}}

==[[arduino]]==
==[http://www.dannyg.com/examples/res2/resistor.htm resistor color codes]==
===refs===
;; http://www.qsl.net/ve3lny/index.html
;; [http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo arduino-info - Nrf24L01-2.4GHz-HowTo]
;; [http://www.nateful.com/differduino/differduino.html Arduino Differential Conntroller | Arduino Solar Hot Water | Differduino | Nateful]
;; [http://garagelab.com/profile/TimMcKenna My Page - GarageLab (arduino, electronics, robotics, hacking)]
;; [http://www.pjrc.com/teensy/td_libs_Ethernet.html Ethernet Arduino Library, using WizNET Ethernet modules with Teensy]
;; [http://denethor.wlu.ca/pc300/ PC/CP300 Electronics Laboratory II]
;; [http://www.dealextreme.com/p/8-channel-5v-solid-state-relay-module-board-red-blue-121337?item=18 8-Channel 12V Relay Module for Arduino PIC ARM AVR DSP - Free Shipping - DealExtreme]
;; [http://www.adafruit.com/products/85 Shield stacking headers for Arduino ID: 85 - $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits]
;; [http://www.mcmelectronics.com/browse/Circuit-Boards/0000000700 Circuit Boards within Project Accessories - MCM Electronics Category]
;; [http://www.technologystudent.com/elec1/relay1.htm Relays and Practical Circuits]
;; [http://www.modtronix.com/product_info.php?cPath=1_36&products_id=149 Embedded PIC based SBC board with Ethernet, RS232, I2C, 12 Analog Inputs, 32 Digital I/Os, free TCP]
;; [http://tuxgraphics.org/electronics/200606/article06061.shtml tuxgraphics.org: An AVR microcontroller based Ethernet device]
;; [http://www.freepcb.com/ FreePCB: freeware PCB layout software]
;; [http://www.freetronics.com/collections/arduino/products/ethermega-arduino-mega-2560-compatible-with-onboard-ethernet Parts & Kits for Arduino Online, Buy Microcontroller Boards, Electronic Components for Arduino - EtherMega (100% Arduino Mega 2560 compatible with onboard Ethernet) - Freetronics]
;; [http://www.codeproject.com/Articles/227810/TCP-IP-Stack-on-a-microprocessor TCP/IP Stack, FAT16 System on a Microcontroller - CodeProject]
;; [http://net.tutsplus.com/tutorials/javascript-ajax/start-using-html5-websockets-today/ Start Using HTML5 WebSockets Today | Nettuts+]
;; [http://www.clare.com/home/pdfs.nsf/www/CPC1998.pdf/$file/CPC1998.pdf www.clare.com/home/pdfs.nsf/www/CPC1998.pdf/$file/CPC1998.pdf]
;; [http://www.aaroncake.net/electronics/solder.htm How To Solder - Soldering Tutorial]
;; [http://www.learnabout-electronics.org/ssr_01.php Solid State Relays]
;; [http://www.kpsec.freeuk.com/trancirc.htm Transistor Circuits]
;; [http://www.datasheet4u.net/ Datasheet4U.net - World Electronic Components Datasheet Search Site!]
;; [http://nl.bu.edu/research/software/downloads/ Downloads �� Software �� Research �� Neuromorphics Lab]
;; [http://www.dannyg.com/examples/res2/resistor.htm Graphical Resistance Calculator]
;; [http://www.societyofrobots.com/robot_parts_list_software.shtml#robot_sim How to Build a Robot Tutorial - Society of Robots]
;; [http://www.pcbheaven.com/exppages/Reverse-Engineering_an_LCD_Display/ Reverse-Engineering an LCD Display]
;; [http://www.ecircuitcenter.com/Circuits/smps_buck/smps_buck.htm SMPS Basics - The Buck Converter]
;; [http://www.guidecircuit.com/Circuit-Microcontroller-Digital-thermostat.htm GuideCircuit : Free Electronics Circuit on website ; Digital thermostat]
;; [http://www.guidecircuit.com/Circuit-Microcontroller-Digital-thermostat-picture.htm GuideCircuit : Free Electronics Circuit on website ; Schematics of Digital thermostat]
;; ===newmodel===

==basics==
*LED flat section toward ground
*breadboard power bars 1/2 of long side
==op amps==

===on using wall warts in circuit design===
http://www.dxing.info/equipment/wall_warts_bryant.dx
===sample circuits===
http://www.discovercircuits.com/S/solidstate.htm

http://members.vol.at/home.floery/electronix/picnic/documentation.html

http://www.edaboard.com/thread5683.html

http://microcontrollerkits.blogspot.com/2011/11/arduino-microcontroller-control-tcpip.html

http://tuxgraphics.org/electronics/200606/article06061.shtml

http://www.freetronics.com/

http://8bitmicro.blogspot.com/2012_02_01_archive.html

http://www.freetronics.com/products/etherten

===[http://www.repairfaq.org/REPAIR/F_semitest.html testing diodes and transistors w/DVM]===