
The Cricket! The Notes!




9 electrolytic capacitors inside (frequently need to be replaced)

5 - 100 mf at 25 volts
4 - 10 mf at 25 volts 




power connector:

5.5mm x 2.5mm barrel - center positive

Special power supply: nominally 9 volts, but "wobbles" up to 10.8 volts with 60 hz line frequency. Signal is converted inside the Cricket to create a 120 hz signal that's fed to pin 39 of the Street microcontroller as a stable time reference. Cricket includes power regulation inside to drop voltage to 5v for the other chips.



electronic components:

U1 - custom Street Electronics microcontroller 03-801-00
U2 - SN74LS02N - 2-input NOR gate
U3 - TL084CN  340B (TI) - J-FET Op-Amp
U4 - UA723CN  406E (TI) - Linear Voltage Regulator
U5 - TLC555CP - Timer/Oscillator
U6 - TMS5220NL  (TI) - Speech Synthesizer
U7 - AY-3-8913 - 3-voice Programmable Sound Generator
U8 - AY-3-8913 - 3-voice Programmable Sound Generator
U9 - LM386N - Audio Power Amplifier
U10 - LM386N - Audio Power Amplifier

Q1 - KS2N4401 - NPN transistor TO-92
Q2 - KS2N4403 - PNP transistor TO-92
Q3 - KS2N4403 - PNP transistor TO-92

REG - 3 pin TO-92 voltage regulator? (can't read markings)

RN1 - SCCO 10-9-5-R 47K(?) resistor network (Stackpole?)

XTAL - 4.9152 MHz (UART/microcontroller clock)




Frank Milliron
frank_o_rama@hotmail.com

June 15, 2023

