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Elektor MultiCalculator Kit

An Arduino-Based Calculator Kit for Electronic Purposes

Elektor MultiCalculator Kit
Elektor MultiCalculator Kit
The Elektor MultiCalculator is more than just a calculator. It calculates binary, hexadecimal, and decimal values, measures light, temperature, and differential temperature, decodes NEC IR remote control codes, handles resistor colors, capacitive and inductive reactance, and more. Best of all, the kit includes both electronic and mechanical parts, with screws, keycaps, and housing.
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Materials

Products

Elektor MultiCalculator (based on Arduino)
Elektor MultiCalculator (based on Arduino)
€49.95
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Component list

Component List

Resistors

R1…R5, R7, R9…R11, R14 = 10 kΩ, 1%

R6, R12 = 100 Ω, 1%

R8, R13 = 1 kΩ, 1%

R15 = LDR GL5516, 5.4×4.4 mm, lead spacing 3.4 mm

R16 = NTC 10 kΩ, type 3950, 5%

R17 = NC

 

Capacitors

C1 = 100 n / 50 V, 10%, X7R, 1/10″

C2, C3 = 10 µ / 25 V, 10%, tantalum, 1/10″

 

Semiconductors

D1, D2 = 1N4148, DO-35

LED = red LED, 3 mm

Q1 = KSA708YBU, TO-92*

Q2 = 2N3904, TO-92*

U1 = Arduino Pro Mini (ATmega328P, 5 V, 16 MHz)

U2 = TSOP14438 IR detector

LCD1 = LCD module type 1602, alphanumeric, 36×80 mm

 

Other

J1 = USB-C socket, chassis mounted, wired (5 V power supply only), 9×16 mm

J2 = 3.5 mm headphone jack, PCB mount, PJ-325M (5 pin connections, 2 switched contacts)

H1 = 6-pin female header, right angle, 1/10″

H2 = NC*

P1 = NC

SW1…SW20 = tactile switches, 12×12×7.3 mm

20 keytops + clear caps for switches (cap is 11.8×11.8 mm)

16-pin male header, height 18.54 mm, 1/10″, vertical, for LCD

16-pin socket, 1/10″, vertical, for LCD

FT232 Pro Mini USB-C TTL adaptor (with 3-pin 3.3 V/5 V selection)

U1 = 12-pin header, vertical, 1/10″, for Arduino Pro Mini

2× NTC, 10 kΩ, waterproof temperature sensor, type 3950 10K with 1 m cable

3.5 mm plug

USB-A to USB-C cable, 1 m

PCB 220684-1 v1.0

 

Enclosure

4× screw, M2×12, steel

4× spacer sleeve, cylindrical, length 3 mm, Øout: 5 mm, polyamide

4× nut, M2, steel

8× washer, M2, Ø 5 mm, height 0.3 mm, polyamide

4× screw, M3×6, steel

4× washer, M3, Ø 7 mm, height 0.5 mm, polyamide

4× standoff, M3, female-female, Øout: 6 mm, length 8 mm, polyamide

4× screw, M3×10, countersunk head, hex (Allen) key 2 mm, steel

4× screw, M3×12, countersunk head, hex (Allen) key 2 mm, steel

4× nut, M3, plating black finish, height 2.4 mm, steel

4× self-adhesive foot; height 3.8 mm, transparent, polyurethane

6 panels made of 3 mm extruded acrylic transparent/clear sheet:
   back, front, bottom, 2× side, and U-shaped keyboard support panel

2 display support panels made of 5 mm extruded acrylic transparent/clear sheet

3 panels made of 3 mm cast acrylic umbra transparent sheet (dark brown): display bezel, small support for display bezel, and keyboard panel

 

* see text

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