Mega Transistor Clock DIY kit digital+binary w/parts or PCB - 50 / 48.5 x 37 cm

/ Electronics

Sold by Mek7

250 USD   /   2.04 XMR

Mega Transistor Clock - a DIY construction designed by me (the seller) in Slovakia, EU.
The clock is built without any integrated circuits - only transistors and diodes. It will surely draw attention of your visitors.
Probably the biggest DIY kit in the world.
Features:
Digital and binary time representation
24-hour time format, blinking double dots (colons), color: red, 1.5" display digits
2 push buttons for time setup (hours and minutes)
Crystal resonator as time base
Power supply: 5 V / 500 mA max. (power supply not included as input voltage varies by country)
596 diodes and 221 transistors
PCB dimensions: 50 x 37 cm (V1) or 48.5 x 37 cm (V3) - height x width

You can buy either the PCB only, or PCB with parts. The set of parts includes:
NPN transistors (208 pcs)
PNP transistors (13 pcs)
diodes 1N4148 (596 pcs)
electrolytic capacitors 10 μF / 16 V (10 pcs)
electrolytic capacitors 1000 μF / 16 V (2 pcs)
ceramic capacitors 100 pF (105 pcs)
ceramic capacitors 22 pF (2 pcs)
ceramic capacitors 100 nF (12 pcs)
ceramic capacitors 22 nF (2 pcs)
ceramic capacitor 1 nF
resistors 150 Ω (66 pcs) - only for V3 - V1 comes with resistors already soldered (SMD)
resistors 1 kΩ (74 pcs)
resistors 100 kΩ (144 pcs)
resistors 10 kΩ (165 pcs)
resistors 1 MΩ (2 pcs)
resistor 10 MΩ
resistor 470 kΩ
crystal resonator 32.768 kHz
display 38.1 mm (1.5 in) red (6 pcs)
LED diodes 5 mm red 20 mcd (24 pcs)
radial choke 120 μH or similar
push buttons 6 mm for PCB (2 pcs)
pin header 1x20, pin spacing 2,54 mm
2-lead PCB screw terminal block

First PCB version (V1) is cheaper because I forgot to include 150R resistors in the design. These V1 PCBs now come with SMD resistors soldered in appropriate places, from the back side where possible. Additionally, 22n capacitors must be soldered next to the push buttons (2 pcs). Details are described in the manual.
V1 is green PCB. V3 is black PCB.
Detailed manual is available in Slovak and English languages, it describes the principle of operation, block-level and detailed schematic is included. More information and assembly manual online at https://mtc.mekweb.eu
A nice gift to any electronic enthusiast / geek.
CAD design files are now also available - check my other moneromarket listing.

Created 3 months, 1 week ago

Shipping from Slovakia

Available stock 2