Difference between revisions of "MIDI-IN-OUT"
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== Drive Circuit == | == Drive Circuit == | ||
| + | |||
| + | * Two options | ||
| + | ** 4N25 | ||
| + | ** CNY17-4 | ||
=== 4N25 Optocoupler === | === 4N25 Optocoupler === | ||
Revision as of 14:32, 29 September 2022
Contents
Features
- Module for Prototyping Synthesizer components
- MIDI In/Out Jacks
- Opto-isolated MIDI Input
- 5V MIDI interface
- 3.3V or 5V Serial connections
- MIDI In is opto-isolated
- (2) 4-40 Mounting holes
Connectors
J1 - MIDI In
- Opto-isolated input
J2 - MIDI Out
J3 - Serial/Power
- Pinout
- V1 (3.3V or 5V
- 5V
- Receive data (out of card)
- Transmit (in to card)
- GND
J4 - Short V1 to 5V
- Short J3-1 to J3-2
- Used when Host Serial interface is 5V
- Open when Host Serial interface is 3.3V
Drive Circuit
- Two options
- 4N25
- CNY17-4
4N25 Optocoupler
- 4N25 Optocoupler
- DC Current Transfer Ratio
- LED Current vs voltage
- Output transistor capacitance
- Switching Time
| Param | Val | Unit |
|---|---|---|
| Vcc (MIDI) | 5 | V |
| Vf LED | 1.2 | V |
| Res ser | 660 | Ohms |
| If LED | 5.76 | mA |
| CTR (min) | 0.2 | A/A |
| Iout (min) | 1.15 | mA |
| Vout | 3.3 | V |
| R(min) | 2.86 | Kohms |
| Vout | 5 | V |
| R(min) | 1.75 | Kohms |
