Duncan Instruments Canada Ltd
Duncan Instruments Canada Ltd.
Electronic Measurement Solutions since 1968
ISO 9001


PB-505 Advanced Circuit Design Trainer

  • Expanded Removeable breadboard area with Lifetime warranty
  • Two open collector pulsers
  • Built-in multi-waveform function generator
  • Quad voltage power supply: Three DC & one low voltage AC
  • Functions with optional electronics trainer boards
  • Built-in logic probe with pulse capture
  • BCD to 7 segment decoder/display
  • 8 channel logic indicatorsSpecifications

Technical Specification:


3-wire AC line input (115V, 60 Hz typical) with power-on indicator.


Fixed DC output: +5VDC @ 1.0A, ripple <5mV, Variable DCO/P: +1.3V to +15V @ 0.5A, ripple <5mV, Variable DCO/P: -1.3V to -15V @ 0.5A, ripple <5mV, Fixed AC O/P: 12.6 VAC Center tapped @ 100mA


Frequency Range: 0.1Hz to 100KHz in six ranges Output voltage: 0 to +10V (20Vp-p) Output impedance: 600 ohms (except TTL) Output Current: 10 mA max., short circuit protect-ed. Output waveforms: Sine, Square, Triangle, TTL Sine wave: Distortion < 3% (10Hz to 100KHz) TTL Pulse: Rise and fall time <25ns Drive 10 TTL loads Square wave: Rise and fall time <1.5s


16 LEDs 8 red to indicate logic high, 8 green to indicate a logic low.


Built-in TTL/CMOS compatible logic probe. Captures fast single shot events and pulse trains. Input impedance 300K, overload protection +50VDC, min.. detectable pulse width 100nsec. TTL threshold low +0.8V high +2.25V, CMOS threshold low +30%Vcc high +70%Vcc. Memory mode, latches on first transition and LED remains on until probe is reset.


Two push-button operated, open-collector output pulsers, each with one normally-open and one normally- closed output. Each output can sink up to 25mA.

POTENTIOMETERS: One 1K, one 10K, all leads available and uncommitted.

BNC CONNECTORS: Two BNC connectors, pin available and uncommitted, shell connected to ground.

SWITCHES: Two SPDT slide switches, all leads available and uncommitted.


8 individual SPDT logic switches, one side of all eight switches connected and switchable to +5V or ground, other side of all eight switches separate, and uncommitted.

BNC CONNECTOR: Two BNC connectors, pin available and uncommit-ted, shell connected to ground.

SPEAKER: 0.25W, 8 ohms

BCD to 7 SEGMENT DISPLAY: 2 BCD to 7 segment display circuits are provided including decoder/driver circuitry. Tie points: 5 per each unit.


A total of 3360 uncommitted tie-points, available on velcro breadboard plate. Two QT-59B, bus strips. Fifty tie-points for each +5V, variable +15V, and ground if desired.

ENCLOSURE: Steel case

WEIGHT: 10 lbs. (4.5kg)

OVERALL DIMENSIONS: 4.5 (H) x 15 (W) x 10.75 (D) (11.4 x 38.1 x 27.3 cm)

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