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4-Transistor Transmitter (Paul C. Sherby) - This circuit provides
an FM modulated signal with an output power of around 500mW. The input
microphone pre-amp is built around a couple of 2N3904 transistors
(Q1/Q2),... [Tony van Roon's circuit] |
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FM Microphone - A micro-transmitter is so small and sensitive, it
have only 8 easy-to-get parts and can be assembled in one hour….
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FM Microphone - Here is the super NEW miracle improved "Frequency
Modulation Wireless Microphone" (BUG) with added easablilty, readability and
copyability. This was necessitated after the number of E-Mail
questions posed by people who were confused by the layout of the project(s).
Before proceeding with the interesting bits, please note.... [from Harry
Lythall's website] |
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FM Radio Microphone with Internal Loop Antenna (Area 50) - This
article began as a design guide for hyper cranial erogenic field generators,
however, your primitive earth brains are completely unable to respond to
erogenic fields in the 100MHz region. I personally had a brain upgrade (for
purely medical purposes of course) so I am able to respond....(schematic /
circuit added 4/08) |
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FM Transmitter-Miniature - (circuit / schematic added 5/03) |
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FM Voice Transmitter - This miniature transmitter is easy to construct and
it's transmissions can be picked up on any standard FM radio. It has a range of
up to 1/4-mile (Tony van Roon's 400 meters) or more, depending on the line-of-sight,
obstructions by large buildings,etc. It is great for room monitoring, baby
listening, nature research,.... [Tony van Roon's circuit] |
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FM Wireless Mike - low power frequency modulated transmitter using two
transistors. The circuit works with 9v power supply...... |
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Low-power FM Wireless Microphone - Small, wireless microphone that will
transmit a whisper to a nearby (1/4 mile radius) FM radio, tuned to the 100 108 Mhz
region of the dial. Powered by 9-volt battery, and features hand-wound inductor.
This Detailed Description contains theory of operation, construction tips, and some
testing procedures. (Circuit design added 10/06) |
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Micro Spy with FETs - Circuit and notes only, no circuit description given….
[Tony van Roon's circuit] |
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Micro Spy with TTL - This circuit is old (70's) but since the 74LS13 is from
the regular 74xx series and easy to obtain, I decided to keep the circuit in place
until components are no longer available. Not much to tell here. Performance is
based on the 74LS13, a 'Dual 4-input Positive-Nand Schmitt Trigger'. This
circuit was experimental and so has no real purpose other than tinkering…. [written by
Tony van Roon] |
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Micro Spy with USW - Circuit and notes only, no circuit description given….
[Tony van Roon's circuit] |
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Minature FM Transmitter - This miniature transmitter is easy to construct
and it's transmissions can be picked up on any standard FM radio. It has a range
of up to 1/4-mile (Tony van Roon's 400 meters) or more, depending on the
line-of-sight, obstructions by large buildings,etc. It is great for room
monitoring, baby listening, nature research,.... [Tony van Roon's circuit] |
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Miniature FM Transmitter - (electronic diagram added 6/03) |
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Miniature FM Transmitter #2 - Miniature FM (voice) transmitter [Tony van
Roon's circuit] |
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Miniature FM Transmitter #3 - Sensitive transmitter [Tony van Roon's
circuit] |
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Miniature FM Transmitter #4 - Schmatic with parts list and notes [Tony van
Roon's circuit] |
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Miniature FM Transmitter #5 - 10 transistor transmitter…. [Paul K. Sherby] |
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Miniature FM Transmitter #6 - upto 500 meter range [Tony van Roon] |
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Miniature FM Transmitter #7 - There is no thrill like the thrill you get
from operating equipment you have built yourself. If you have never built a project
from a magazine before, let this be your first--you'll see how much satisfaction and
fun you can have!… [Tony van Roon] |
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Miniature MW Transmitter - circuit diagram of simple medium wave transmitter
using BF494B. This simple transmitter have a range of 200 meters......
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Shortwave Bug - Circuit and notes only, no circuit description given…. [Tony
van Roon's circuit] |
| Simple FM Transmitter Schematic - There is no
thrill like the thrill you get from operating equipment you have built yourself. If
you have never built a project from a magazine before, let this be your first--you'll
see how much satisfaction and fun you can have!… [Tony van Roon] |
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Wireless microphone - Schematic only, no circuit description |
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Wireless Microphone - Circuit & notes only, no circuit description given….
[Tony van Roon's circuit] |
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wireless microphone transmitter - ….(design added 04/09) [Peter Jakab,
Electrical Engineer, Engineer of Informatics] |
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