SpeakJet SuperCarrier PCB & Kit Now Available.
Small board [1.5" x 2.25"] with 4 mounting holes in corners; solder reflowed, solder mask, silkscreen component outline Dual-port Digital Control: level-shifted serial port [DB9 female] and TTL, configurable via jumper Sockets for SpeakJet and other chips Green LED for Ready, Yellow LED for Speaking, and Red LED for Buffer Half Full [with Jumper to enable/disable LEDs] SpeakJet Pin Access
Rcx, OUT2, Gnd via 3 pin Berg Header [see above as 'TTL']
6x2 pin Berg Header with Reset Line, M0 Line, M1 Line, and OUT2, OUT1, and OUT0 lines. These can be manipulated with jumpers, simple NO/NC switches, or logic gates.
8x2 pin Berg Header for Event Lines E0 thru E7 [including RC0/RC1] which can be manipulated with jumpers, simple NO/NC switches, or logic gates.
Power Supply
Depends on how unit is assembled. If assembled WITHOUT the regulator, then it accepts regulated +5v. Otherwise:
Input supply: 7v-18v [only up to 12v if is LM386N-1 installed]
Optional on-board 7805 voltage regulator w/LED indicator
Regulated +5 volt available for off-board use at power connector [4 pin Berg Header].
Audio features
On-board Audio Amp [LM386N-4] w/volume control
2 pin Berg Header for PWM out [selectable by jumper]
2 pin Berg Header for Line-level Audio out [selectable by jumper]
2 pin Berg Header for Speaker [4 ohm-32 ohm, 1 watt supported] Note that it's also possible with these headers and jumpers to use your own filter and bring the audio back in to the on-board amp.