Public Domain
Please refer to Dr. Scott M. Baker's blog below. Home ∕ Electronics Projects ∕ Z80 Retrocomputing 5 – Single Stepper for RC2014 I'm very interested with the Dr. Scott's project TIL311 Bus Monitor Board and this Step Executor Board.
This time I'd like to make this board with my favorite parts like pod with tab control, alternate Toggle switch for single stepper. Therefore I decided to make my own Step Executor PCB reffering Dr.Scott' Single Stepper PCB thru EasyEDA and JLCPCBs this time also.
I made some mistake with Ver.1.0 PCB, so I revised circuit and PCB design to Ver.2.2. (I don't make PCBs with this new Version. But I guess It would work correctly because I reflected every amendment with Ver1.0. (Sample pictuire is Ver1.0 w/amendment ) https://www.youtube.com/watch?v=j-svLecRzLU
Special Parts 500KΩ(not 50k) POD:Linkman RD925G-QA1-B504 marutsu parts(Japan) https://www.marutsu.co.jp/pc/i/62776/ TOGGLE SW：Copal ATE1F-5M3-10-Z （digi-key:563-1767-ND) SWITCH SLIDE SP3T:EG1313 (digi-key:EG2485-ND )
It works pretty fine now. It is fun to change execution speed with the Pot tab. But I didn't get license permission to share from Dr.Scott M Bayer.
Therefore, I would probably be eaten by grue!
| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 7.3728MHz | X1 | OSC-TH_L10.0-W4.5-P5.00 | 1 |
| 2 | 50kΩ POD | VR1 | 50KΩ POD | 1 |
| 3 | 1K | R6,R11 | AXIAL-0.3 | 2 |
| 4 | Header-Female-2.54_2x6 | P3 | HDR-TH_12P-P2.54-V-R2-C6-S2.54 | 1 |
| 5 | SWITCH-SLIDE-SP3T | S1 | SWITCH-SLIDE-SP3T | 1 |
| 6 | 22pF | C3,C4 | RAD-0.1 | 2 |
| 7 | 0.01u | C6,C7,C9 | RAD-0.1 | 3 |
| 8 | 1u | C10 | RAD-0.1 | 1 |
| 9 | 1u | C1 | RAD-0.1 | 1 |
| 10 | 0.1u | C5,C8,C11 | RAD-0.1 | 3 |
| 11 | NE555N | U2,U3 | DIP-8_L9.8-W6.6-P2.54-LS7.6-BL | 2 |
| 12 | 100uF | C2 | CAP-TH_BD6.3-P2.50-D1.0-FD | 1 |
| 13 | SWITCH TOGGLE SPDT | U6 | SWITCH TOGGLE SPDT | 1 |
| 14 | 1M | R1 | AXIAL-0.3 | 1 |
| 15 | 4.7k | R2,R3,R7,R8 | AXIAL-0.3 | 4 |
| 16 | 10k | R4,R5,R9 | AXIAL-0.3 | 3 |
| 17 | 1k | R10 | AXIAL-0.3 | 1 |
| 18 | 1N4148 | D3,D2,D1 | DO-35_BD2.0-L4.0-P8.00-D0.5-FD | 3 |
| 19 | SN74HCT04N | U1 | DIP-14_L19.0-W7.0-P2.54-LS7.6-BL | 1 |
| 20 | 2P Header | P2 | HDR-TH_2P-P2.54-V-M | 1 |
| 21 | DIP Green | D5 | LED2-2.54-D3.0MM | 1 |
| 22 | DIP RED | D4 | LED2-2.54-D3.0MM | 1 |
| 23 | RC40bus | P1 | RC40BUS | 1 |
| 24 | SN74HCT00N | U5 | DIP14 | 1 |
| 25 | SN74HC74N | U4 | DIP-14_LS7.62-L19.69-W6.60-PITCH2.54 | 1 |
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