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Minute Man Electronics

Unique Products and Components
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Mini-VOX & Relay Kit (Sound Activated Switch)Mini-VOX & Relay Kit (Sound Activated Switch)
Philmore DATAKit # 80-126

For the uninitiated, VOX = Voice Activated Switch. This is a switch (relay) that may be activated with any sound, including the human voice.

A very sensitive circuit that may be adjusted to react to very low volume sounds or a yell or hand clap. While a VOX is often used to activate a sound recorder, it may be used to trigger an alarm (the mike easily picks up vibrations in windows, wall or door), activate a video camera, radio transmitter or simply turn on a light.

The relay will release after a few seconds of silence, holding as long as sound continues. (hold time may be changed up to 30 seconds) Operates on 12V DC and very low current.

We suggest you also order a soldering tool kit to make this project. Click here to go to this item (# S540).

 Click Here For Picture Of Soldering Kit # S540.


Price:  $22.31 


Ultrasonic Movement Detector
Philmore DATAKit # 80-200

The circuit uses a matched pair of 40Khz transducer elements to detect movement out to about 22 feet. You may add a relay (not included) to switch a heavy appliance etc.; the unit switches just an LED as supplied.

The circuit can be switched to latch "on". An ideal alarm circuit that cannot be easily fooled.

We suggest you also order a soldering tool kit to make this project. Click here to go to this item (# S540).

 Click Here For Picture Of Soldering Kit # S540.


Price:  $41.70 

Ultrasonic Movement Detector


Electronic Combination LockElectronic Combination Lock
Philmore DATAKit # 80-290

This really is an excellent introduction to electronic security systems. Set your own four digit code, a wrong sequence simply resets the lock. The correct code will activate a relay that can handle up to 240 volts AC.

The nine digit key-pad is on a separate board connected to the circuit via a ribbon cable (30"), so a variety of mounting ideas is possible. Requires a 9 or 12 volt battery or supply.

We suggest you also order a soldering tool kit to make this project. Click here to go to this item (# S540).

 Click Here For Picture Of Soldering Kit # S540.


Price:  $23.74 


PIR Motion Detector
Philmore DATAKit # 80-300

One of our favorite circuits. The circuit sees infrared heat, such as from intruders body. The kit uses a late development in movement IC’s and employs a very sophisticated circuit.

You may set it to non-trigger in daylight hours. When tripped, an LED indicator lights and relay is tripped. "Sees" up to about eighteen feet. Operation on 9 to 12 volt battery with very long life.  


Price:  $41.70 

PIR Motion Detector


Light AlarmLight Alarm
Philmore DATAKit # 80-080

A sensitive photo Darlington transistor is used with CMOS nand gate. The circuit detects light and triggers a siren.You could add your own triac or relay and switch practically anything.

The kit uses the MEL12 Darlington superalpha phototransistors, typically about ten times more sensitive than a normal phototransistor. The circuit usage includes burglar alarms, medicine cabinet alarm, automobile alarm etc...  


Price:  $22.96 


Infrared Beam Door Minder
Philmore DATAKit # 80-013

A transmitter sends an I/R beam up to 75 feet to a receiver (on separate pc boards); break the beam and a relay is tripped. Use the relay to control a bell or light or other device ; even a video recorder and camera.

Operation requires 9 to 12 VDC, a wall adaptor is fine and you may want two units (provision is made to power both boards with one supply via a two conductor wire). Use to watch a hallway or drive way, across the doors to a three or four car garage etc. and we know of a photographer taking wildlife photos this way.

The uses for alarms, photography, door minding and so on are numerous. You could make weatherproof hoods to use out-of-doors but be sure to protect from moisture.

We suggest you also order a soldering tool kit to make this project. Click here to go to this item (# S540).

 Click Here For Picture Of Soldering Kit # S540.


Price:  $36.72 

Infrared Beam Door Minder

Minute Man Electronics

Unique Products and Components
$20 Minimum
Merchandise Order
Thank You