Here's some notes I looked up when I opened it and did the mod , the 3 lead device that drives the led's I couldnt track down, most likly a simple pnp or npn.
I did not open the RF can [Link: rds.yahoo.com]
National P/N LM78L05 - 3-Terminal Positive Regulators
LM78L05 - 3-Terminal Positive Regulators[Link: national.com]
- 36k - Cached
Generic P/N 78L05 General
Description Features Datasheet Package
& Models Samples
& Pricing Reliability
Parametric Table Parametric Table
Temperature Min (deg C) -40
Temperature Max (deg C) 85
Multiple Output Capability No
On/Off Pin No
Error Flag -
InputMin Voltage (Volt) 6.70
InputMax Voltage (Volt) 35
Output Current (mA) 100
RegType Linear Regulator
Output Voltage (Volt) 5 [Link: fairchildsemi.com]
Quad 2-Input NAND Schmitt Trigger
The CD4093B consists of four Schmitt-trigger circuits. Each circuit functions as a 2-input NAND gate with Schmitt-trigger action on both inputs. The gate switches at different points for positive and negative-going signals. The difference between the positive (VT+) and the negative voltage (VT-) is defined as hysteresis voltage (VH).
All outputs have equal source and sink currents and conform to standard B-series output drive (see Static Electrical Characteristics).