Indice
Papers & notes concerning electronics
Papers
- [Datasheets directory](http://boris.maetech.it/docs/datasheets/)
- Slides [“elettronica open source - microcontrollers”](http://boris.maetech.it/docs/papers/opensourceelectronics-microcontrollers.pdf) : overview sui microcontroller, utilizzate in occasione del Linux Day 2011 a Pordenone
- Cable designations standards also pdf version
External Links
Bit manipulating hacks
Nuova Elettronica
Beautiful electronic project - The Bulbdial clock
Using CDs to measure laser wavelenght
SMD Fuses Letter to Value Chart
B = 0.125 C = 0.2 D = 0.25A E = 0.375A F = 0.5A X = 0.68A G = 0.75A H = 1.0A J = 1.25A K = 1.5A L = 1.75A N = 2.0A O = 2.5A P = 3.0A R = 3.5A S = 4.0A T = 5.0A
(thanks to Carlo Pollice)
D-Sub connectors
Lamp sockets
- GY socket, one pin is bigger than the other, used for MSD discharge lamps.
- GX socket, both pins same thickness, used for PC-proj's 1000W lamps.
Pinouts & Wirings
ELMO Serial cable
DUCATO LAMPADA VANO MERCE
Red/blue = +12V (subject to timeout) Green/black = 0V door switch Black = 0V
+---------------------+ conn. | | | | | | +-----(X)----+---/--+ switch 1 | | +--+ | lamp | | +------+ +---/--+ switch 2 | | +----------------------------+
Spencer Resusci Power Plug
The socket used is an XLR
Pin 1 = +12V
Pin 2 = GND
Nellcor(r)/Sunrom pulsioximetry sensor
numbers refer to DB9 connector pins IR led 2 --------+-----|>|------+-------- 3 |-----|<|------| RED led photodiode 5 -------------|>|---------------- 9 7 -------( cable main shield ) 6.0K-9.7K 6 -------+-------/\/\/\/\---------- 1 | |-------( sensor shield )
Symbol LS2106 barcode scanner ps/2 wiring / pinout
To scanner | PS/2 | |||||
---|---|---|---|---|---|---|
Rj45 pin | wire colour | header pin | function | IDC pin | wire col | din pin |
orange | 1 | data out | 2 | red | 1 (male) | |
red | 2 | +5 Vcc | 4 | green | 4 (male) | |
13 | purple | 4 (female) | ||||
yellow | 3 | ground | 3 | orange | 3 (male) | |
10 | orange | 3 (female) | ||||
green | 4 | clock in | 5 | purple | 5 (male) | |
brown | 5 | clock out | 12 | green | 5 (female) | |
purple | 6 | data in | 14 | red | 1 (female) | |
NC | - | - | shield | 6 | shield | shield |
Note: Male ps/2 to PC, female PS/2 to keyboard (optional)
Note: +5Vcc line interrupted by external adaptor plug: if plug is inserted, ps/2 vcc is disconnected and external + goes to scanner
METEOR START-UNI 1ST052642 barcode scanner wiring
The handheld scanner presents a cable with a DB9 female on its ending. It has an adapter from DB9 Male to 2 x PS/2 (DIN) Male & Female. Inside the handheld scanner, the cable attaches to K2 on an aux pcb with a 232 transceiver and the pushbutton switch. K1 on this pcb goes to the real barcode scanner PCB assy. The following table represents wiring, between brackets wiring through the RS232 transceiver.
PS2 male | PS2 female | DB9 (scanner) | wire colour | K2 | K1 | note |
---|---|---|---|---|---|---|
4 | 4 | 9 | black | 1 | 1 | VCC +5V |
3 | 3 | 7 | purple | 2 | 2+3 | GND |
4 | switch to gnd | |||||
5 | 4 | green | 5 | 5 | ps2 clock out | |
1 | 8 | grey | 6 | 6 | ps2 data in | |
3 | yellow | 8 | (7) | rs232 RX (from host) | ||
5 | blue | 7 | (8) | rs232 TX (to host) | ||
1 | 1 | brown | 3 | 9 | ps2 data out | |
5 | 2 | red | 4 | 10 | ps2 clock in |
Not mentioned pins are Not Connected. The aux pcb also has a jumper and a 7805 footprint for +12V supply from the same K2 pin 1. The jumper & 7805 footprint are between K2 pin 1 and K1 pin 1.
Urmet domus power supply and peripherals
External station (portiere elettrico):
- 1 don't know, maybe not amplified output
- 1A amplified microphone output
- 2 input
- -/+ audio power supply
- L should be LED
- G/T pushbuttons common
- Ux pushbuttons
Power supply module (786/15)
- PS(2) Tone generator output
- C(2)/SN(2) Current sensing circuit (to make relay trip)
- +/- Audio power supply
- -J Amplified output for intercommunicating circuit (audio is revealed from “+” !)
- Relay contacts:
- 2,5,8 common
- 1,4,7 normally open
- 3,6,9 normally closed
- C1-SN1 makes relay trip to NO, C2-SN2 makes relay relax to NC
IBM 4820 Touch monitor (ELO 4500U)
Connector marked as “4” is USB device (input), optionally plus power.
P/N 14J0930, 14J0624 — FRU/SMU 42M5673, 42M5671
Referring to the image, pin 2 is D-, pin 3 is D+, pin 4&5 are GND.
A guide says pin 1 should be 5V input and pin 6 12V input, but I am not convinced about this.
AVR simple programmers
mcu DAPA STK200=ponyprog DASA (serial) VCC 3 - RST 16 9 7 (4.7k res. series + 5.1 zener diode to gnd) SCK 1 6 (opt. 1k r) 4 (4.7k res. series + 5.1 zener diode to gnd) MOSI 2 7 (opt. 1k r) 3 (4.7k res. series + 5.1 zener diode to gnd) MISO 11 10 8 (no add'l comp)
Cisco rj45 rs232 terminal console
RJ45 male (cisco) DB9 female (PC) RJ45 DB9 - 1 3 2 6 3 7 4 4+5 5 2 6 8 7 1 8 - 9 ________ / /| |||||||| | 1 8 contact view (hook is behind)
APC Smart UPS communcation rs232 cable
Dumb segnalling UPS DB9 PC DB9 4 5 2 8 1 4 5 1 8--10k--1 Smart cable UPS DB9 PC DB9 2 2 1 3 9 5 a version says 1+2 7+8 another says 1+4 7+8 Terminal is 2400:8n1
Sharp LCD module 1x16 alpha chars (taken from a laser printer)
pin funct 1+2 gnd 3 led buffer enable #g1 5 44780 enable 6 44780 r/w 15 vcc 16 gnd 17 44780 rs + led buffer clock 18 db4 19 db5 20 db6 21 db7
Chinese PL-2303 USB to ttl serial interface
|^^^^^^^^^^^^^^^^^^^^^^| ^^^^^| o | <--- 3.3V out | component oo | <--- GND usb | side oo | <--- RX (from ext.device to the pc ) A | oo | <--- TX (from the pc to the ext.device) _____| o | <--- 5V out |______________________|
Professional 4-pin-XLR headsets
used for intercoms, etc.. 4 pin XLR : 1. MIC GND - 2. MIC SIGNAL - 3. EARPHONES GND - 4. EARPHONES SIGNAL
Cinema-tech
- Dolby Sorround = fittizio, parte da una traccia stereo e ricrea il rear con un po di delay
- Dolby Spectral Recording (per il cinema) e Dolby Pro Logic (per l'home teather) = appare il canale centrale e (opzionale) il canale LFE (low frequency effects)
- Dolby Digital = codifica AC3 multicanale
- DTS = più raffinato rispetto al Dolby Digital
CINEMASCOPE da pellicola [-] apre a schermo 221:100 [ – ]