projekte:eurotwo

EuroTwo CPU

Latest information are listed here.

  • Holes for signals: 2_2mm vias or pads
  • Holes for currents: 3.2
  • GND on top holes
  • +5V on bottom holes
  • 2x FullAdder / 4x HalfAdder
  • 4x Controlled Inverter from 4Bit Relay Adder
  • 9 Bit AND
  • 4 Bit Register
  • MUX 1-4,1-16, DEC 1-4,1-16, 4 Bit MUX 1-4
  • Clock
  • RAM
  • ROM
  • Logo

This board is made of 120 LEDs just for this board. It is the projectlogo with through-pcb illumination.

Schematics

  • left

BOM

Designator Package Quantity Designation
D* LED_1206_3216 120 blue at 16mA, 5V
R* R_0603_1608 120 330R
C1,C2 CP_Elec_6.3×5.4 2 47uF
C3,C4,C5 C_0805_2012 3 100nF

2020-10-18

Testing worked fine. Design looks nice.

2020-08-10

I designed a testing board with a SN754410 H-Bridge driver for testing. I can test 4 outputs and 4 inputs per testing board easily with an Arduino now. The SN754410 is still in delivery and will get assembled later.

2020-08-01

My automated long term test is up and running. 1000 test-iterations per bit. Tuned the loading speed of the C (adding 100 Ohms), added diodes (1N4007) and tuned the holding voltage of the relais better by adding 100 Ohms.

2020-06-28

Fixed the „4-Bit Register rev2“ board. The board is fully functional but has some drawbacks. You need to scratch away 8 traces on the board and solder 8 short wires on it.

The fixes for rev3 are:

  • Cs were not aligned correctly to matching relais. Nobody will see this but still, it is not as intended! Fixed in rev3
  • There is a mistake at the store relays. That is why you need to scratch traces. Fixed in rev3
  • Rev2 is unable to select between rising and falling edge. This is fixed in rev3 by a jumper
  • B.Mask is under the LED-Indicator on the back, that is why the light is not as bright as intended. Fixed in rev3.
  • Numbering of the LEDs would be helpful. Fixed in rev3.

2020-06-18

The PCBs for the 4Bit Register and the Logo did arrive. I assembled them successfully. I'm now waiting for the new Relays HK19F for the final test of the registers. In the Logo-PCB there was a little mistake but I succeed fixing it by scraping away two traces.

  • projekte/eurotwo.txt
  • Zuletzt geändert: 2020/10/18 14:26
  • von max