Electronic diy schematics

This is a simple stun gun circuit schematic just for learning! In No Way Do I Recommend Building these Stun-Guns or the actual use of them for any purpose what so-ever.
We will present more stun gun schematics but in no way we recommend you to build it, I Assume NO LIALIBITY for any resulting actions of those persons who build or use any of these devices!
This stun gun delivers 50.000 Volts and produces high voltage pulses discrupting muscles and nervous system, leaving anyone who touches it in a state of menthal confusion.
The stun gun circuit schematic: more … »

This fm power amplifier circuit is built with BLY94 transistor which delivers up to 50W at 175MHz and has a power gain of 7dB, arround 5x power amplification.
But in this schematic bly94 is working in 3 meter band, FM 88-108 MHz, so it has a higher power gain, 8dB - 6x. So if we use a good quality trimmers and coils with 7W input rf power BLY94 will deliver up to 50W rf power. If you use it in C class dont connect R1. The power supply must be 28V stabilized and must support a minimum 3.5A current consumption at 7W input rf power.
50W BLY94 FM power amplifier schematic components: more … »

A very simple and cheap tv antenna amplifier circuit built with BF961 a N–Channel Dual Gate MOS common transistor used for input- and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.
Bellow you have the antenna tv amplifier schematic and here is the BF961 datasheet.
L1 = L2 = 5turns / 0.8mm Ø / 5mm Ø / the second turn from ground.
This tv antenna amplifier can be used even as an fm receiver amplifier because it has a wideband amplification, so if you dont use it for the tv set you can receive better your favorite radio stations. more … »

BF961 is a N–Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode.
BF961 Applications:
Input- and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.
Features:

Integrated gate protection diodes

High cross modulation performance

Low noise figure

High AGC-range

Low feedback capacitance

Low input capacitance
BF961 datasheet

The simpliest audio mixer schematic on the net. It has only one transistor and can support as many audio signal as you can afford. BC109C is a very cheap transistor and with a few resistor and capacitors you can build quickly a simple audio mixer that you can use in your pirate radio or wherever you want, imagination is the final frontier. Please keep in mind not to use higher voltages than 22V as a power supply for this audio mixer.