It’s Back To School Time
Providing Fun Electronics Learning Kits For Over 3 Decades!
The kit has a pulsing 80 volt tickle
output and a mischievous blink-
ing LED. And who can resist a
blinking light and an unlabeled
switch! Great fun for your desk, “Hey, I told you not to
touch!” Runs on 3-6 VDC.
TS4 Tickle Stick Kit
Our #1 Mini-Kit for 35 years!
Alternately flashes two jumbo red
LED’s. Great for signs, name badges,
model railroading, and more. Used throughout
the world as the first learning kit for students young and
old! Great solder practice kit. Runs on 3-15 VDC.
BL1 LED Blinky Kit $7.95
Super Snoop Amplifier
Super sensitive amplifier that will
pick up a pin drop at 15 feet! Full 2
watts output drives any speaker for a
great sound. Makes a great “big ear”
microphone to listen to the “wildlife” both in
the field and in the city! Runs on 6-15 VDC.
BN9 Super Snoop Amp Kit
Not only does it chirp just like a
real cricket, it also senses temper-
ature and changes the chirp
accordingly. Can actually deter-
mine temp by chirps! Squishing under your feet voids
warranty! Runs on 9VDC battery. Speaker included.
ECS1 Cricket Sensor Kit $24.95
Produces a very pleasant, but obnox-
ious, repetitive “plink, plink” sound just
like a drip into a bowl of water! Learn
how a simple transistor oscillator and a 555
timer can make such a sound! Drives any speaker for a
cool sound. Runs on 4-9 VDC.
EDF1 Dripping Faucet Kit
Exactly duplicates the upward and down-
ward wail of a police siren. Switch clo-
sure produces upward wail, releasing it
makes it return downward. Produces a loud
5W output, and will drive any speaker! Horn speakers
sound the best! Runs on 6-12 VDC.
SM3 Electronic Siren Kit $7.95
Build a time delay, keep something on
for a preset time, provide clock pulses
or provide an audio tone, all using the
versatile 555 timer chip! Comes with circuit
theory and a lots of application ideas and schematics to
help you learn the 555 timer. Runs on 5-15 VDC.
UT5 Universal Timer Kit $9.95
Voice Activated Switch
Voice activated (VOX) provides a
switched output when it hears a
sound. Great for a hands free PTT
switch, or to turn on a recorder or light!
Directly switches relays or low voltage loads up to
100mA. Runs on 6-12 VDC.
VS1 Voice Switch Kit
Encodes OR decodes any tone 40 Hz to
5KHz! Add a small cap and it will go as
low as 10 Hz! Tunable with a precision 20
turn pot. Great for sub-audible “CTS” tone squelch
encoders or decoders. Drives any low voltage load up
to 100mA. Runs on 5-12 VDC.
TD1 Encoder/Decoder Kit
The famous RF preamp that’s been
written up in the radio & electronics mag-
azines! This super broadband preamp cov-
ers 100 KHz to 1000 MHz! Unconditionally stable gain
is greater than 16dB while noise is less than 4dB! 50-
75 ohm input. Runs on 12-15 VDC.
SA7 RF Preamp Kit
Touch on, touch off, or momentary
touch hold, it’s your choice with this
little kit! Uses CMOS technology.
Actually includes TWO totally separate touch circuits on
the board! Dries any low voltage load up to 100mA.
Runs on 6-12 VDC.
TS1 Touch Switch Kit
Walking Electronic Bug
Built around a pair of subminiature
cell phone motors, this bug wanders
around looking for things to bump
into! Sensors below his LED eyes sense
proximity and make him turn away! Steer him with
flashlights too! Runs on two “N” batteries.
WEB1 Walking Bug Kit
Mad Blaster Warble Alarm
If you need to simply get atten-
tion, the “Mad Blaster” is the
answer, producing a LOUD ear shat-
tering raucous racket! Super for car
and home alarms as well. Drives any
speaker. Runs on 9-12VDC.
MB1 Mad Blaster Warble Alarm Kit
DTMF Encoder Decoder
Decodes standard Touch Tones from
telephones, radio, or any audio
source. Detects and decodes any
single digit and provides a closure
to ground up to 20mA. Great for
remote tone control Runs on 5VDC.
TT7 DTMF Encode/Decode Kit
Cable Polarity Checker
Checks continuity AND polarity of
a pair of wires! Simply connect
the remote board to one end, and the tester
to the other end and LED’s show opens,
shots, and polarity! Even includes auto power
off! Runs on a standard 9V battery.
MK132 Cable Polarity Checker $7.95
Water Sensor Alarm
This little $8 kit can really “bail you out”!
Simply mount the alarm where you want to
detect water level problems (sump pump!).
When the water touches the contacts the
alarm goes off! Sensor can even be remotely
located. Runs on a standard 9V battery.
MK108 Water Sensor Alarm Kit
RF Actuated Relay
Just what you need when adding
a preamp or power amp in line
with an antenna! Auto senses RF
and closes an on-board DPDT relay that’s good to UHF
at 100W! Also great to protect expensive RF test equipment. Senses as low as 50m W! Runs on 10-15VDC.
$7.95 RFS1 RF Actuated Relay Kit $19.95
Light Actuated Switch
Tired of turning your lights off? This little
kit auto senses light and automatically
closes the on-board SPDT relay. Light
sensitivity is adjustable and a delay cir-
cuit prevents recycling. Relay contacts are rated at 5A.
Runs on 12-15VDC.
MK125 Light Actuated Switch Kit $7.95
Power Saver Timer
Add time delay power-off to any
of your projects or circuits!
Momentary push button selects
desired time delay (1H, 2H, 4H,
8H, 24H) and LED flashes faster as time approaches.
On-board 10A relay. Runs on 120/240VAC.
K8075 Power Saver Timer Kit
Steam Engine & Whistle
Simulates the sound of a vintage
steam engine locomotive and
whistle! Features variable engine
speed and volume. Whistle blows at
a touch of a button! Great for model train setups.
Includes the speaker. Runs on a standard 9V battery.
MK134 Steam Engine & Whistle Kit $10.95
IR Remote Control Checker
Is your IR remote control working? Just point
and shoot, and this kit will let you know!
Confirms IR signal generation from any IR
remote and displays proper receipt on the four
LED display. Don’t change the batteries, check
the remote first! Runs on a standard 9V battery.
MK137 IR Remote Checker Kit $6.95
SMT Multi-Color Blinky
The ultimate blinky kit! The 8-pin micro-
controller drives a very special RGB LED in
16 million color combinations! Uses PWM
methods to generate any color with the micro,
with switchable speed selection. SMT construction with
extra parts when you lose them! Runs on 9V battery.
SBRGB1 SMT Multi-Color Blinky Kit $29.95
Stereo Ear Super Amplifier
Ultra high gain amp boosts audio 50
times and it does it in stereo with its
dual directional stereo microphones!
Just plug in your standard earphone or
headset and point towards the source. Great
stereo separation besides! Runs on 3 AAA batteries.
MK136 Stereo Ear Amplifier Kit $9.95
SMT High Intensity Blinky
The SMT revival of our classic BL1!
Super bright SMT LED’s alternately flash
in a brilliant display. Subminiature construction makes it perfect for badges and
displays. SMT construction with extra parts when you
drop them! Includes two LR55 button cells.
BL2 SMT High Intensity Blinky Kit
Did You Know...
✔ It’s impossible to give you full specs on these products in a 1” space!
✔ A lot of our kits are also available “factory assembled and tested”, if you don’t want to build it!
✔ We have over 350 products currently available, and all those don’t fit here!
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