| Unit |
Specifications |
| 1. Display unit |
|
| 1.1. Power Supply |
|
1.1.1. Battery
|
Sealed battery 12V, 18Ah (PORTALAC) |
1.1.2. Battery charger
|
input 15-24V (available IBM ThinkPad AC adaptor) |
|
output -18V (variable) |
1.1.3 Charge monitor
|
Ampare monitoring 0-999mA (Digital) |
| 1.2. Receiver |
|
1.2.1. Radio receiver
|
429MHz FSK radio receiver (10 channels) |
1.2.2. Receiver control
|
Latch circuit with J-K flip-flop IC and relay (Original circuit) pcb |
1.2.3. Antenna
|
NR-77 (DIAMOND Antenna Corp.) |
| 1.3. BSO display |
|
1.3.1. BSO display
|
40 LEDs per each B, S, O (total 280 used) |
1.3.2. HEFc display
|
White LEDs for H, Red LEDs for E and Fc. Total 150 used. |
| 1.4. Display control |
|
1.4.2. Brightness control
|
3 levels (Hi-Mid-Low) for B, S, O |
1.4.1. Blinking control
|
controllable blink time for H, E, Fc |
|
|
| 2. Operating unit |
|
| 2.1. Power supply |
Sanyo Eneloop 1.2V(2000mAh) x 4 |
| 2.2. Transmitter |
|
2.2.1. Radio transmitter
|
429MHz FSK radio transmitter (10 channels) |
2.2.2. Transmitter control
|
transmit by push-buttons (momentary type) |
2.2.3. Antenna
|
10 cm Helical Antenna (SMA) |
| 2.3. Counter |
|
2.3.1. Number pitched
|
countable(up/down) 00-99 for inning pitch and total pitch |
2.3.2. Time display
|
Current time (installed), Game elapsed time (not yet) |
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