Enclosure not stated
ISD25xx Recording Device
- Category
- Delay· Delay Echo and Samplers
- Price
- see vendor
- Tags
- Delay Echo and Samplers
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 31 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| R1 | 470K | 470k | read from the schematic by eye | |
| R2 | 4K7 | 4.7k | read from the schematic by eye | |
| R3 | 22K | 22k | read from the schematic by eye | |
| R4 | 22K | 22k | read from the schematic by eye | |
| R5 | 680R | 680 | read from the schematic by eye | |
| R6 | 680R | 680 | read from the schematic by eye | |
| R7 | 1K | 1k | read from the schematic by eye | |
| R8 | 10K | 10k | read from the schematic by eye | |
| R9 | 10K | 10k | read from the schematic by eye | |
| R10 | 100K | 100k | read from the schematic by eye | |
| R11 | 100K | 100k | read from the schematic by eye | |
| Capacitors 8 | ||||
| C1 | 0.1uF | 100n | monoblock (104); read from the schematic by eye | |
| C2 | 0.1uF | 100n | monoblock (104); read from the schematic by eye | |
| C3 | 100uF | 100u | electrolytic; read from the schematic by eye | |
| C4 | 0.1uF | 100n | monoblock (104); read from the schematic by eye | |
| C5 | 220uF | 220u | electrolytic; read from the schematic by eye | |
| C6 | 0.1uF | 100n | monoblock (104); read from the schematic by eye | |
| C7 | 1uF | 1u | electrolytic, mini; read from the schematic by eye | |
| C8 | 4.7uF | 4.7u | electrolytic; read from the schematic by eye | |
| Diodes 1 | ||||
| D1 | 1N4148 | 1N4148 | reverse-polarity protection; read from the schematic by eye | |
| Transistors 3 | ||||
| Q1 | BC547 | BC547 | read from the schematic by eye | |
| Q2 | BC547 | BC547 | read from the schematic by eye | |
| Q3 | BC557 | BC557 | read from the schematic by eye | |
| ICs 1 | ||||
| ×1 | ISD2540 | ISD2540 | drawn as ISD25xxx; any ISD25xx chip fits, kit ships the 40 s ISD2540; 28-pin socket; read from the schematic by eye | |
| Switches 4 | ||||
| Stop/Reset | Momentary | MOMENTARY | hat keyswitch, PCB mount; read from the schematic by eye | |
| Start/Pause | Momentary | MOMENTARY | hat keyswitch, PCB mount; read from the schematic by eye | |
| Record/Play | SPDT | SPDT | PCB mounted; read from the schematic by eye | |
| S2 | SPDT | SPDT | Loop/Normal, PCB mounted; read from the schematic by eye | |
| LEDs 2 | ||||
| LED1 | 5mm LED | 5MM LED | Record indicator; read from the schematic by eye | |
| LED2 | 5mm LED | 5MM LED | Playback indicator; read from the schematic by eye | |
| Other 1 | ||||
| ×1 | Electret microphone | ELECTRET MICROPHONE | read from the schematic by eye | |