In a previous element14 presents project, Matt took an old 2XL robot toy from the 1970s and, with the help of a Raspberry Pi, dragged it into the 21st century by turning it into a functional AI voice assistant. Now, after a few other challenges focusing on retro computers and esoteric timepieces, he's back to put some finishing touches on 2XL! In this video, Matt will repair the malfunctioning 8-track player that is at the heart of the original 2XL toy, attempt to build a voice changer to make his assistant sound more like the original robot voice, and top it all off by building a power distribution solution that will allow him to run everything from a single power supply!
Supplemental Content:
- How To Build A 5V Buck Converter
- How To Build A Voice Changer
- Voice Changer Toy Teardown
- How To Repair An 8-Track Player Mechanism
- Assembling the Velleman MK171 Voice Changer Kit
Bill of Material:
| Product Name | Manufacturer | Quantity | Buy KitBuy Kit |
|---|---|---|---|
| Rotary Potentiometer | TT ELECTRONICS / BI TECHNOLOGIES | 1 | Buy Now |
| De-Ox-Id AEROSOL 4 oz | GC Electronics | 1 | Buy Now |
| Hobby Project Kit, Voice Changer Novelty Kit, On-Board Microphone | Velleman | 1 | Buy Now |
| Zener Single Diode, 3 V, 500 mW, DO-35, 5 %, 2, 200 C RoHS Compliant: Yes | Nexperia | 1 | Buy Now |
| Speaker, Mini, 60 mm, 0.5 W, 8 ohm, 260 Hz to 4 kHz | Multicomp Pro | 1 | Buy Now |
| MICROPHONE, MINIATURE, ELECTRET | Kingstate | 1 | Buy Now |
| Through Hole Resistor, 4.7 kohm, LR Series, 250 mW, ± 1%, Axial Leaded, 200 V | TE | 2 | Buy Now |
| Ceramic Disc Capacitor, 0.1 µF, 50 V, MCFY Series, +80%, -20%, Y5V, 5 mm | Multicomp Pro | 3 | Buy Now |
| LED, Diffused, Red, Through Hole, T-1 3/4 (5mm), 10 mA, 2 V | Dialight | 2 | Buy Now |
| Electrolytic Capacitor, 4.7 µF, 16 V, MCNP Series, ± 20%, Radial Leaded, 2000 hours @ 85°C | Multicomp Pro | 1 | Buy Now |
| Electrolytic Capacitor, 10 µF, 25 V, FC Series, ± 20%, Radial Leaded, 1000 hours @ 105°C | Panasonic | 1 | Buy Now |
| Electrolytic Capacitor, 100 µF, 16 V, M Series, ± 20%, Radial Leaded, 2000 hours @ 85°C | Panasonic | 2 | Buy Now |
| Electrolytic Capacitor, 22 µF, 16 V, MCGPR Series, ± 20%, Radial Leaded, 2000 hours @ 85°C | Multicomp Pro | 1 | Buy Now |
| Trimpot, Single Turn, Cermet, Top Adjust, 47 kohm, Through Hole, 1 Turns | Bourns | 1 | Buy Now |
| Rotary Potentiometer, 100 ohm, 1 Turns, Linear, 2 W, ± 10%, 93 Series | Bourns | 1 | Buy Now |
| Through Hole Resistor, 47 kohm, MF25 Series, 250 mW, ± 1%, Axial Leaded, 250 V | Multicomp Pro | 1 | Buy Now |
| Through Hole Resistor, 10 kohm, MF12 Series, 125 mW, ± 1%, Axial Leaded, 200 V | Multicomp Pro | 1 | Buy Now |
| Through Hole Resistor, 1.2 kohm, MCF Series, 500 mW, ± 5%, Axial Leaded, 350 V | Multicomp Pro | 1 | Buy Now |
| Through Hole Resistor, 10 ohm, MCMF0W4 Series, 250 mW, ± 1%, Axial Leaded, 250 V | Multicomp Pro | 1 | Buy Now |
| Through Hole Resistor, 330 ohm, MCCFR0W8J Series, 125 mW, ± 5%, Axial Leaded, 200 V | Multicomp Pro | 2 | Buy Now |
| Through Hole Resistor, 100 kohm, LR Series, 250 mW, ± 1%, Axial Leaded, 200 V | Multicomp Pro | 1 | Buy Now |
| Audio Power Amplifier, 325 mW, AB, 1 Channel, 4V to 12V, DIP, 8 Pins | TI | 1 | Buy Now |
| Tactile Switch, FSMJ Series, Top Actuated, Through Hole, Round Button, 160 gf, 50mA at 24VDC | TE | 4 | Buy Now |
| Surface Mount Power Inductor, SLF Series, 22 µH, 1.9 A, 0.0591 ohm, ± 20% | TDK | 1 | Buy Now |
| Electrolytic Capacitor, Miniature, 180 µF, 16 V, UPW Series, ± 20%, Radial Leaded | Nichicon | 2 | Buy Now |
| Schottky Rectifier, 45 V, 6 A, Single, TO-263AB, 3 Pins, 600 mV | Vishay | 1 | Buy Now |
| Multilayer Ceramic Capacitor, 0.47 µF, 50 V, Mono-Kap Series, +80%, -20%, Radial Leaded, Y5V | Vishay | 1 | Buy Now |
| Ceramic Disc Capacitor, 10000 pF, 50 V, D Series, +80%, -20%, Z5V, 6.4 mm | Vishay | 1 | Buy Now |
| Electrolytic Capacitor, 15 µF, 50 V, GA Series, ± 20%, Radial Leaded, 1000 hours @ 105°C | Panasonic | 3 | Buy Now |
| Buck (Step Down) Switching Regulator, Fixed, 8V-40V In, 5V And 5A Out, 260 kHz, TO-263-7 | TI | 1 | Buy Now |
Additional Parts:
| Product Name |
|---|
| HT8950A Voice Modulator Chip |
|
Voice Changer Toy |
|
Mego 2XL |
Raspberry Pi 2XL Robot Assistant Part 2