Amiga RS232 to LVTTL with 3.3V Power converted and taken directly from the DB25 serial port 12V-pin (pin 9)
VERIFIED WORKING!!!
https://drive.google.com/file/d/105Ov4MyicygtOqv-1FFOkmMn0a-dk8-Z/view?usp=sharing
Revision 1A
| Designator | Name/Value | Package | Notes |
|---|---|---|---|
| U1 | TPS54308 Step-down converter | SOT-23-6 | TPS54308DDCR |
| U2 | MAX3232 RS-232 Interface IC 3-5.5V | TSSOP-16 | MAX3232IPWR |
| L1 | CLF7045NIT-100M-D Power Inductor, 10 uH | 7 mm x 7 mm, height 4.5 mm | CLF7045NIT |
| J1 | D-Sub DB25 Female connector | EdgeMount, serial port connector solder type | D-Sub DB25F |
| J2 | 1x05 Right-Angle Single Row Male Pin Header | Type/Color: Reverse | PinHeader |
| R1 | Feedback Resistor 22k Ω | 0603 | RC0603FR-0722KL |
| R2 | Feedback Resistor 100k Ω | 0603 | RC0603FR-07100KL |
| R3-R5 | LED Resistor 1k Ω | 0603 | RC0603FR-071KL |
| C1 | Capacitor 10uF | 0805 | TMK212BBJ106KG-T |
| C2,C4 | Capacitor 0.1uF = 100nF | 0805 | |
| C3 | Capacitor 47uF | 1206 | EMK316BBJ476ML-T |
| C5-C8 | Capacitor 0.1uF = 100nF | 0603 | CL10B104KO8NNWC |
| D1-D3 | SMD LED | 0603 | SMD LED 0603 |