This compact instrument is intended to be a digital laboratory
tool for hardware and, in some cas... more This compact instrument is intended to be a digital laboratory tool for hardware and, in some cases, software debugging. It contains four instruments in one unit: logic probe, single channel logic state analyzer, frequency counter and serial code receiver. The only chip used is a PIC16F84A running at 10 MHz. The display unit is a LCD dot matrix alphanumeric module with 2 rows of 20 characters. The LCD is used as the display device for all functions, except for the logic probe which indicates low, high and pulse logic states on individual LEDs. Mode select, parameter change, function execute and ON/OFF switching is activated by two keys. The probe tip is the common input for all functions, and the GND cable is used for connection to Vss of the tested circuit. Although there are a lot of functions integrated in a single chip unit, it did not increase the complexity of hardware, as all functions are implemented in software. This enables a very good price/performance ratio. The power supply is obtained by four 1.2V/180 mAh or 250 mAh NiCd batteries of LR03 (AAA) size. The instrument also has a battery manager, which supports automatic battery discharging and charging. The source code is written in MPASM. As it is highly optimized for code space, most of the code could not be written in a modular format. For the same reason, a lot of subroutines have more than one entry point and some of them are terminated by a GOTO instruction instead of using a RETURN instruction
This compact instrument is intended to be a digital laboratory
tool for hardware and, in some cas... more This compact instrument is intended to be a digital laboratory tool for hardware and, in some cases, software debugging. It contains four instruments in one unit: logic probe, single channel logic state analyzer, frequency counter and serial code receiver. The only chip used is a PIC16F84A running at 10 MHz. The display unit is a LCD dot matrix alphanumeric module with 2 rows of 20 characters. The LCD is used as the display device for all functions, except for the logic probe which indicates low, high and pulse logic states on individual LEDs. Mode select, parameter change, function execute and ON/OFF switching is activated by two keys. The probe tip is the common input for all functions, and the GND cable is used for connection to Vss of the tested circuit. Although there are a lot of functions integrated in a single chip unit, it did not increase the complexity of hardware, as all functions are implemented in software. This enables a very good price/performance ratio. The power supply is obtained by four 1.2V/180 mAh or 250 mAh NiCd batteries of LR03 (AAA) size. The instrument also has a battery manager, which supports automatic battery discharging and charging. The source code is written in MPASM. As it is highly optimized for code space, most of the code could not be written in a modular format. For the same reason, a lot of subroutines have more than one entry point and some of them are terminated by a GOTO instruction instead of using a RETURN instruction
Uploads
Papers
tool for hardware and, in some cases, software
debugging. It contains four instruments in one unit:
logic probe, single channel logic state analyzer, frequency
counter and serial code receiver.
The only chip used is a PIC16F84A running at 10 MHz.
The display unit is a LCD dot matrix alphanumeric module
with 2 rows of 20 characters. The LCD is used as
the display device for all functions, except for the logic
probe which indicates low, high and pulse logic states
on individual LEDs. Mode select, parameter change,
function execute and ON/OFF switching is activated by
two keys.
The probe tip is the common input for all functions, and
the GND cable is used for connection to Vss of the
tested circuit.
Although there are a lot of functions integrated in a single
chip unit, it did not increase the complexity of hardware,
as all functions are implemented in software. This
enables a very good price/performance ratio.
The power supply is obtained by four 1.2V/180 mAh or
250 mAh NiCd batteries of LR03 (AAA) size. The
instrument also has a battery manager, which supports
automatic battery discharging and charging.
The source code is written in MPASM. As it is highly
optimized for code space, most of the code could not
be written in a modular format. For the same reason, a
lot of subroutines have more than one entry point and
some of them are terminated by a
GOTO
instruction
instead of using a
RETURN
instruction
tool for hardware and, in some cases, software
debugging. It contains four instruments in one unit:
logic probe, single channel logic state analyzer, frequency
counter and serial code receiver.
The only chip used is a PIC16F84A running at 10 MHz.
The display unit is a LCD dot matrix alphanumeric module
with 2 rows of 20 characters. The LCD is used as
the display device for all functions, except for the logic
probe which indicates low, high and pulse logic states
on individual LEDs. Mode select, parameter change,
function execute and ON/OFF switching is activated by
two keys.
The probe tip is the common input for all functions, and
the GND cable is used for connection to Vss of the
tested circuit.
Although there are a lot of functions integrated in a single
chip unit, it did not increase the complexity of hardware,
as all functions are implemented in software. This
enables a very good price/performance ratio.
The power supply is obtained by four 1.2V/180 mAh or
250 mAh NiCd batteries of LR03 (AAA) size. The
instrument also has a battery manager, which supports
automatic battery discharging and charging.
The source code is written in MPASM. As it is highly
optimized for code space, most of the code could not
be written in a modular format. For the same reason, a
lot of subroutines have more than one entry point and
some of them are terminated by a
GOTO
instruction
instead of using a
RETURN
instruction