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K100 Stereo Preamplifier Tone Control Unit - An easy-to-build preamplifier with tone control, using an all-in-one IC.
High-current unregulated DC power supply.
This circuit controls the intensity of a light (incandescent bulb only, 200W max, not included) in response to the level of the audio input.
This kit uses a touch plate to control the operation of a 555 timer and a 250V/12A relay "FALL SALE!"
This stereo amplifier module provides greater than 1W of output power into a wide range of output loads (4 Ohms to 16 Ohms).
Out of Stock
This kit contains a xenon flashtube as found on aircraft, camera flash units, signal beacons and disco lights.
Multi-mode timer kit using an embedded micro-controller. The timer controls a 12V relay with 120V/10A contacts.
This kit allows a DC motor to be speed-controlled in both forward and reverse.
4 Channel relay with reset on each channel. "FALL SALE!"
A logic probe can be really useful for testing digital equipment, especially for debugging micro-controller circuits. "FALL SALE!"
This 1W mono amplifier module operates over a wide range of voltages (3VDC to 15VDC: supply not included).
This is a more powerful FM 'bug' (monaural microphone included) than K7 or K18.
Matched 40 kHz transmitter/receiver pair of transducers detects movement at over 7 meters. "FALL SALE!"
This kit contains the essential components to build a high-power mono audio amplifier using the LM1875 IC.
This is another "building block" convenience kit, provided for when you need a linear regulator but don't want to wire one up discretely.
This kit can be used to control the speed of any common DC motor rated up to 60V/7A.
This is a basic adjustable-voltage power supply using the popular three pin regulator, LM317T.
This is a very powerful 'bug' for its size, 3V supply and number of components.
Yet another "building block" convenience kit, provided for when you need positive and negative linear regulated DC power but don't want to wire up your own supply.
This kit provides a simple, low cost stereo VU meter.
A very simple 2 Watt mono audio amplifier using the LM380.
General-purpose discrete mono preamplifier. 40dB fixed gain.
Set of 22 original back-issues, Polyphony/Electronic Musician.
Polyphony #0601: May/June 1980
Polyphony #0604: Jan/Feb '81
Polyphony #0703: Nov/Dec '81
Polyphony #0801: Sept/Oct '82
The 9741 dual voltage-controlled amplifier module consists of two independent VCAs which can be used to modify audio or control signals.
Out of Stock
The 9752 monitors the input signal voltage and copies it to the output, synchronized to changes in an input control voltage (CV) or an input clock, or synchronized to an internal clock if there is no external input.