After studying the Velleman MK171 Voice Changer kit that I assembled in a previous video, I wanted to play around with some elements of the circuit to see if I could customize it. In this video, I'll walk through the circuit schematic and explain how the voice changer works before replicating the design on breadboard, then soldering it to protoboard.

 

PARTS/TOOLS:

 

https://www.newark.com/nexperia/bzx79-c3v0-133/zener-single-diode-3-v-500-mw/dp/96K7357

https://www.newark.com/multicomp-pro/mp001193/driver-type-miniature/dp/07WX1236

https://www.newark.com/kingstate/kecg2740pbj/microphone-miniature-electret/dp/24M3209?st=electret%20mic

https://www.newark.com/te-connectivity/lr0204f4k7/res-metal-film-4k7-1-200v-axial/dp/95W7764

https://www.newark.com/multicomp-pro/mcfyu6104z6/ceramic-capacitor-0-1uf-50v-y5v/dp/97K4396

https://www.newark.com/dialight/521-9240f/led-red-t-1-3-4-5mm-6-3mcd/dp/30K0568?st=led

https://www.newark.com/multicomp-pro/mcnp16v475m5x11/aluminum-electrolytic-capacitor/dp/13M5152

https://www.newark.com/panasonic/eea-fc1e100/aluminum-electrolytic-capacitor/dp/49W4526

https://www.newark.com/panasonic/eca-1cm101b/aluminum-electrolytic-capacitor/dp/48W7597

https://www.newark.com/multicomp-pro/mcgpr16v226m5x11/aluminum-electrolytic-capacitor/dp/70K9672

https://www.newark.com/bourns/3362p-1-473lf/trimmer-pot-47k-1turn-th/dp/06X9089

https://www.newark.com/multicomp/mf25-47k/through-hole-metal-film-resistor/dp/38K5356

https://www.newark.com/multicomp/mf12-10k/through-hole-metal-film-resistor/dp/38K5401

https://www.newark.com/multicomp-pro/mcf-0-5w-1k2/carbon-film-resistor-1-2kohm-500mw/dp/38K0265

https://www.newark.com/bourns/93r1a-r22-a05l/track-resistance-100ohm/dp/30AC6062

https://www.newark.com/multicomp-pro/mcmf0w4ff100ja50/metal-film-resistor-10-ohm-250mw/dp/58K3794

https://www.newark.com/multicomp-pro/mccfr0w8j0331a20/carbon-film-resistor-330-ohm-125mw/dp/58K5112

https://www.newark.com/te-connectivity/lr0204f100k/res-metal-film-100k-1-200v-axial/dp/95W7697

https://www.newark.com/texas-instruments/lm386n-1-nopb/audio-power-amplifier-class-ab/dp/41K5102

https://www.newark.com/alcoswitch-te-connectivity/1825910-6/tact-switch-spst-0-05a-24vdc-solder/dp/60M5365

 

The HT8950A is unavailable at this time

 

RESOURCES:

 

Circuit schematic: