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projekte:eurotwo [2021/01/02 23:23] max |
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- | ====== EuroTwo CPU ====== | ||
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- | Contact: [[user: | ||
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- | Documentation: | ||
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- | ==== Status ==== | ||
- | === 2021-01-03 === | ||
- | After I found that the ISP programming pins are wrong, I successfully programmed the first digital controller. The clock simulation is now up and running. Next RAM and ROM simulation. That will be a software task. It is fun to work digital again! | ||
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- | === 2021-01-02 === | ||
- | I made a bunch of power cables today. Also I ordered a lot of screws and other stuff. Hopefully tomorrow my board will arrive! | ||
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- | === 2020-12-31 === | ||
- | I soldered 5 more MUXs. Also I ordered ~100 new PCBs. Distributors, | ||
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- | === 2020-10-28 === | ||
- | I tried a different setup of the logo illumination by using two PCBs. I sanded the backside of the first PCB and assembled the LED in the other direction on the second one. This look much smoother and better! | ||
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- | === 2020-10-18 === | ||
- | Testing worked fine. Design looks nice. | ||
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- | === 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. [[https:// | ||
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- | === 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. | ||
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- | === 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. | ||
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- | 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. | ||
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- | === 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. | ||
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- | ===== Documentation ===== | ||
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- | ==== Downloads ==== | ||
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- | ==== Sizes/ | ||
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- | * Holes for signals: 2_2mm vias or pads | ||
- | * Holes for currents: 3.2 | ||
- | * GND on top holes | ||
- | * +5V on bottom holes | ||
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- | ==== Errata ==== | ||
- | === HalfAdder rev1 === | ||
- | - Silkscreen AxorB -> A&B | ||
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- | === DigitalController v1 === | ||
- | * https:// | ||
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