Electronics

555 Timer

https://www.electronics-tutorials.ws/waveforms/555_timer.html

SN75176

RS485

7 Segment Display

CC Common-Cathode 0.36 inch 3-digit 7-segment display http://www.xlitx.com/datasheet/3631AS.pdf http://www.lanpade.com/7-segment-led-dot-matrix/3631as.html

Xlitx HSN-3631AS

3dig 7seg display

common-cathode: the active digit pin is the ground, the rest is hooked to 5V with a 300-1k current limiting resistor

Pinout Diagram

D1  A  F D2 D3  B
12 11 10  9  8  7

 1  2  3  4  5  6
 E  D DP  C  G NC

Digits

  A
F   B
  G
E   C
  D   DP

http://www.xlitx.com/datasheet/3631AS.pdf

MAX7219

https://www.analog.com/media/en/technical-documentation/data-sheets/max7219-max7221.pdf

10 microfarad capaciter between 5v and gnd
33K on pin 18 on max7219

https://www.friendlywire.com/tutorials/max7219/

opamps

opamps philips ua741cn

EEPROM Programmers

TL866 G3 = T48 Programmer

http://www.xgecu.com/

Minipro

https://www.eevblog.com/forum/blog/eevblog-411-minipro-tl866-universal-programmer-review/2000/

https://forums-xgecu-com.translate.goog/viewthread.php?tid=170&extra=page%3D1&_x_tr_sch=http&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

https://gitlab.com/DavidGriffith/minipro

MX27C512 compatible

The MX26C512A is erased by EPROM programmer or in-system. The device is set up in erase mode when A9 =OE/VPP = 12.75V are applied, with VCC = 5V. (Algorithm is shown in Figure 3). The erase time is around 1sec. If the erase is not verified, an additional erase processes will be repeated for a maximum of 200 times.


MODE	!CE	!OE/VPP	A0	A9	OUTPUTS
Erase	VIL	VPP 12.75V	X	VPP 12.75V	HIGH Z
Erase Verify	VIL	VPP 12.75V	X	X	DOUT

VCC = 5V

OE/VPP = 12.5V is applied with VCC = 6.25V

25~100us pulse to the CE input

     <ic
         name="MX27C512@DIP28"
         type="1"
         protocol_id="0x07"
         variant="0x10"
         read_buffer_size="0x1000"
         write_buffer_size="0x80"
         code_memory_size="0x10000"
         data_memory_size="0x00"
         data_memory2_size="0x00"
         page_size="0x0000"
         pages_per_block="0x0000"
         chip_id="0x0000c2d1"
         voltages="0x5070"
         pulse_delay="0x0064"
         flags="0x00000068"
         chip_info="0x0006"
         pin_map="0x0016"
         package_details="0x1c000000"
         config="NULL"
     />

https://www.youtube.com/watch?v=cPROJgbFuKw

fuel consumption minus 20 percent.bin

M95320

fast programming mode

Voltage Regulators

AMS1117-5V

https://www.autodesk.com/products/eagle/blog/what-is-a-voltage-regulator/