I am going to show you a step-by-step process to building a spybug from common electrical componenets.

Step 1: Components

Components list


  1. C1  1n disk capacitor (102) 1 pc.
  2. C2  5.6pF disk capacitor(562) 1 pc.
  3. C3, C4 10 uF Elec. Capacitor(25-50v) 2 pcs.
  4. C5 3-18 Trimmer Capacitor 1 pc.
  5. R1 330 ohm 1/8 w  Resistor 1 pc.
  6. R2, R5, R6 4.7k 1/8 w Resistor 3 pc.
  7. R3 10k 1/8 w Resistor 1 pc.
  8. R4 100k 1/8w Resistor 1 pc.
  9. Q1, Q2 2N2222 NPN Transistor 2 pcs.
  10. L1, L2 5-6 turns copper coil 2 pcs.
  11. 10mm Electret microphone 1 pc.
  12. 9v battery and clip

     All Resistors can be substituted with 1/4 watt. The transistor can be substituted with a 2n3904-06 transistor. 

Step 2: Schematic

Here's the schematic, any questions leave them I will answer quickly as possible.

Step 3: PCBV Layout

Here is a picture of the PCB that I made for this spybug, or you could just make it on perfboard if you want. 

Step 4: Resistors

First I soldered the resistors on just below where the mic will go. These are R5 & R6.

Step 5: Adding Components

Next I add C4 (10 uF cap), Q1,Q2 (2n3904 transistor) & R4 (100k)

Step 6: Adding Components

Next step I add the electret microphone, and the two coils. The coils should be wrapped around a 1/4 inch drill bit 6 times to get the coil needed for this project.

Step 7: Adding Components

Now I add C1 (102) capacitor, R1 (330 ohm res.), R3 (10k res.) and C4 ( the other 10uF capacitor)

Step 8: Adding Componenets

In this step I add the last resistor (R2), then I checked to se if every coponent is where it should be just to be sure.

Step 9: Adding the Trimmer, Etc.

Finally comes the trimmer cap, the battery connector and the antenna wire. I chose to use a braided copper wire for this antenna just to try it but you can use whatever you like.

Step 10: Next Week the FM Phone Bug.

Next week I will be adding a new Instructable, the FM phone bug. This will hook up to one of the 2 phone lines
Cliffyd I maid ot the photo I post but it could not work why? Reply me soon.
<p>i made it but it coudn't work why tell me why?</p>
I made one but could not work. Why? Tell me. I made as U told in the diagram
how far is ? (the range)
100 meters
<p>Is 100mt a long range?</p>
it says &quot;5-6 turns of .5 dia wire&quot; what measurement is .5?
i meant is it in milimeters, or other type of measurement
i think im on the wrong page/thread https://www.instructables.com/id/Making-a-simple-spybug/
i have no idea what frequency this broadcasts at. is this just supposed to be obvious? i'm going to assume 100 MHz until you say something else. Hmm, that doesn't work. there are a lot of frequencies out there...
No sorry try around 88-94mhz <br>
wow, now I can do surveillance on beehard44 (lol, pun intended)
this is supposed to be our communications in sierra charlie hotel *CENSORED CENSORED* lima, riiight?
uuh, roger that hotel-bravo-four-four. you forgot to mention we needed 2 coils, or did you make another version?over. (all pun intended)
uhhhh # 10 says 2 coils, is that what you mean? <br>
Oh, I didn't see that there.... Now, all I have to do is get that other ceramic capacitor that messed up my circuit and put it where it belongs... then solder.... I should have breadboarded it before I began soldering. Thanks for the correction.
what's mit
what number is the PCB
could you post a pdf of the pcb artwork
one more thing, for the 5.6 cap, 5.6 what? pf,uf,...? can you give me a link to the one you bought? thanks
is this help ? http://electronics-diy.com/calculators.php
not really, thanks anyway

About This Instructable




Bio: I am a 35 yr. old licensed Iron worker/ Fabricator/ Welder/ Millwright but now in college currently in 2nd of 3rd year for Civil Engineering ... More »
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