Ideal Maniac


Chip labeled 
PIC1655A-036
7941
TAIWAN
C30408-036E


4 buttons
Holding the unit with the power switch at lower right, button 1 is at the top,
button 2 is on the right, button 3 is at the bottom and button 4 is at the left.

2 7-segment LEDs
Hold the unit with the power switch at the bottom for orientation.

piezo


PIC1655A pinout
1  /RTCC - +6v
2  VDD - +6v
3  VXX - +6V
4  VSS - Gnd
5  Test - Gnd
6  A0 - button 1
7  A1 - button 2
8  A2 - button 3
9  A3 - button 4
10 B0 - Left LED segment A
11 B1 - Left LED segment B
12 B2 - Left LED segment C
13 B3 - Left LED segment D
14 B4 - Left LED segment E
14 B5 - Left LED segment F
14 B6 - Left LED segment G
17 B7 - Piezo
18 C0 - Right LED segment A
19 C1 - Right LED segment B
20 C2 - Right LED segment C
21 C3 - Right LED segment D
22 C4 - Right LED segment E
23 C5 - Right LED segment F
24 C6 - Right LED segment G 
25 C7 - Piezo
26 CLKOUT - N/C (measured 210 KHz)
27 OSC - 470pF cap to ground, 13.4K to +6v (measured 800-890 KHz)
28 /MCLR - diode/cap/resistor (low at power on for 2.6mS, then high)

OSC resistance is via 9.1K resistor and 23K trimmer glued in position.

Power on flashes 88 three times with beeps.