Test & Measurement

K1 - Three Digit LED Counter Price Photo Docs
Basic low cost counter. Two or more counter modules may be plugged together with the 6-pin sockets & harness provided. Uses a single-unit 3-digit LED display.and is built around the 14553 & 14551 chips. Box & battery are provided. The separate COUNTER MODULE shows how to use the Kit as a counter. Has COUNT & RESET switches with debounce circuit built in to eliminate problems from noisy switches. 9V battery operation.

K2 - LCD Temperature Meter Price Photo Docs
Introduces 3 1/2 digit LCD and the very popular 7106 IC. This IC has been used in low-cost multimeters for over 13 years. We use it to measure temperature using a ordinary signal transistor as the sensor. Data sheets are provided as is a breadboard area so you can extend the circuit to build your own voltmeter, ammeter, resistance meter or extended-range temperature meter. Takes away the mystery of how multimeters work. Box provided. 9V battery operation.

K23 - Opamp Function Generator Price Photo Docs
Cheap and simple circuit to generate square, (pseudo) sine and triangle waveforms in the audio range. Uses quad opamp LM348.

K24 - Logic Probe Price Photo Docs
A logic probe is one of the most important pieces of equipment for testing digital circuits. Apart from fault finding testing it can also assist in design work and to find out how digital equipment works. Switch for either TTL or CMOS. Includes detection circuit for very fast pulses. Gives visual (3 LEDs) and audio (piezo buzzer) response.

K61 - 3 1/2 Digit LED Panel Meter Price Docs
Make this general design 3 1/2 digit LED panel meter into your own voltage or current meter. Or customize it to measure input from a transducer. Full details given in the documentation. Separate display PCB. Uses 7107 IC.

K89 - Stereo VU Meter Price Photo Docs
A simple, low cost stereo VU meter. Two LM3915 dot/bar display driver ICs are used to drive 2 rows of 10 LEDs (4 green, 3 yellow, 3 red) in a moving bar display. Each row of LEDs spans a power range of 0-30 dB in ten 3-dB steps. This VU meter indicates "peak music power" when used with audio amplifiers. Ideal add-on for any of the amplifier kits. Dimensions = 65mm x 42mm

K111 - Simple Square Wave Oscillator Price Docs
This simple kit, based on the popular 555 timer IC, generates six preset frequencies - 1Hz, 10Hz, 100Hz, 1KHz, 10KHz and 100KHz. The output is selected by setting a jumper position. It has a wide operating voltage (5-18V) and even provides visual indication (LED) of the output. A 9V battery snap is provided and a suitable mounting box supplied.

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