Parts (Electronics)

IC

Part	Name	Cost	Notes
555/556	Timer	$2.15 / 50
LM8560	Alarm clock	$1	All-in-one alarm clock; LED driver, time, alarm.
TDA7000	FM Radio	$2	All-in-one FM radio
CD4053	Multiplexer/Demultiplexer	$1 / 10
LM386N	Audio Amp	$1 / 5	Good for low power audio (1.25W)
MAX7219CNG	8 digit 7 segment display driver	$3.70 / 10	Look pretty cool!
L6219	Stepper Driver	$5 / 5	This one seems a little cheaper and more common.
L293	Stepper Driver	$5 / 5
PCF8563P	Real time clock	$1 / 2
Various	Shift Register	$1 / 10
Various	SPI Flash	$1.5	Offer several MB of storage on a chip (~64).
various (HM62256, hm628128)	SRAM chip	~$2	Around 256KB
CD4040 / CD4060	12-bit counter	$2 / 5

Power regulation

Part	Name	Cost	Notes
LM741	Op Amp	$1.20 / 10
LM317	Linear reg.	$1.30 / 10
LM78xx	Linear reg.	$1.30 / 10	The xx is the voltage; 05,06,08,10,12,15,18,24
LM2575T LM2576T	Switching reg.	$3.00 / 10	2575 = 1A ; 2576 = 3A
LM723	Voltage and current regulator	$6.50 / 10	found here
LM2596T	Switching reg.	$3.00 / 10	Similar to above, I think the switching is slower
MC34063	Boost Buck Switching reg	$2.40 / 50	40v 1.5A }| Microcontrollers Name Cost I/O Flash Speed Peripherals Notes ATTINY85 60¢ 6 8K 20MHz 2pwm, 2-8 timer, 1adc Small dev boards are available for around $1.75 ATTINY2313 $1 16 8K 20MHz 2pwm, 2-8 timer, 1adc ATMEGA8 90¢ 23 8K 16MHz 3pwm, 2adc, 2-8/1-16 timer Small dev boards are available for around $1.75 ATMEGA328 $2 23 32K 20MHz 3pwm, 2adc, 2-8/1-16 timer Used on Arduino Uno and Pro ATmega2560 $4 23 32K 20MHz 3pwm, 2adc, 2-8/1-16 timer Used on Arduino Mega, no dips, try TQFP + dip adapter Cortex M3 (SM8958AC25PP) $3 ~36 32K 40MHz all the things not clear if it's 8 or 32 bit. Dev boards for $3. Z80 $1.5 well... they've been around forever PIC (PIC16F630) $1 ~12 ~2K 20MHz Packages Name Description DIP dual in-line pin, pins are 1/10" apart, 1/4" wide QFP Quad Flat Pack Modules Name Cost Description 16x2 HD44780 LCD $2 Displays a wide range of characters, standard driver 20x4 HD44780 LCD $5.50 About the same per char as above (a little more) ESP8622 $2 Wifi module HC-06 $4 Bluetooth module 8Ω Speaker $2 IR Avoidance $1 Detects nearby objects HC-SR501 IR Motion $0.85 Detects movement, good for activating lights $1 USB to Serial bridge 433MHz Transmitter & Receiver $1 Peltier Cooler $2.25 They take 60W so, needs a lot of power. 84x48 2.4" $2.5 LCD Module (Nokia) 240x320 2.4" $7 LCD Module 320x480 3.5" $13 LCD Module 800x480 7" $35 LCD Module, these get complicated Power Name Cost Description Voltage Meter $2.00 3x7seg LED, generally wide ranges of voltages Buck Module $2.74 (4-40v) → (1.3-37v) @ 2A; includes led panel. Found a 9A version for $5, no display. Mini voltage regulator $6.50 / 10 There are several, typically around 20v → 17v (and anything below). Buck only. 2A:3A Bread Board Supply $1 Nice little package that plugs into a bread board and supplies either 3.3v or 5v. Takes 6.5v-12V through 5.5mm or USB 12V 1A Adapter $1.75 Wall wart Micro Buck adapter $4.16 / 10 Switching buck regulator. In 4.75V-23V, Out 1V-17V, 1.8A, can handle bursts of 3A. Semiconductors Part Cost Limit Part PNP BJT (TO-92) $1.43 / 100 40v 200mA 2N3906 NPN BJT (TO-92) $1.20 / 100 60v 200mA 2N3904 PNP BJT (TO-220) $2.60 / 50 100v 3A https://www.fairchildsemi.com/datasheets/TI/TIP32C.pdf TIP32] NPN BJT (TO-220) $2.6 / 50 60v 3A TIP31 PNP BJT (TO-3) $4.87 / 5 60v 10A MJ2955 NPN BJT (TO-3) $2.60 / 5 60v 15A 2N3055 N-chan MOSFET (TO-92) $2.01 / 50 60v 200mA 2N7000 P-cha MOSFET (TO-92) $14 / 50 45v 230mA BS250 Note cost compared to N-chan N-chan MOSFET (TO-220) $2.95 / 10 100v 9.7A IRF520N P-cha MOSFET (TO-220) $2.38 / 10 100v 23A IRF9540 Diode $1.25 / 100 1000v 1A 1N4007 Zener Diode $4 / 50 1W For zener=12v, but there are assortment kits Crystal Oscillator $1 / 10 16 MHz The TO-220 transistors are often sold in PNP/NPN pairs. LEDs Part Cost Notes 5mm Single Color $4 / 100 Some color packs available 3mm Single Color $1.5 / 100 Some color packs available Tri-Color 5mm $5 / 100 Some color packs available 1W LED $8 / 50 Super bright, needs driver Laser 650nm (red) 5mW $2 / 10 With copper module Laser 1W 445nm (blue) $19 really needs a driver Laser 2W 445nm (blue) $31 really needs a driver Laser 3W 808nm (infrared) $60 super needs a driver 4-Digit 7 Segment $1 / 2 There's a driver IC Packages Name Description TO-92 Small black, semi circle, 3 leads from the bottom TO-3 metal can, good for heat dissipation, cheap heat-sinks, shaped like a rounded diamond about 1"x1.5", leads are .43" apart TO-220 metal tab heatsink 5mm Common LED package TO stands for transistor-outline. Sensors Part Cost Notes Temperature sensor $3 / 5 TO-92, -67F:257F Photoresistor $1 / 20 Phototransistor $5 / 100 IR, faster response than a photoresistor Capacitive Electret Microphone $1 / 10 needs a driver Ultrasonic module $1 Strain sensors Weight sensor Switches and buttons Part Cost Notes Rotary Switch $2 : $5 Lots of variety 2P2T Rocker Switch $3 / 10 Lots of variety Illuminated Rocker Switch $2 / 5 Most take 12v for power. Momentary push button switch $0.15 - $5 Rotary Encoder $5 / 10 Needs a knob. Magnetic switch $1 Linear Components Resistors Resistors are typically 1/4W. The cost for these is negligible, assortment packages typically come in around 0.6¢ per resistor. To handle higher wattage, they can be used in parallel. Potentiometers range in price and variety. With a knob, they run around $1 a piece. Trim pots are around 5¢ a piece. Capacitors Electrolytic up to 220uF are very cheap (2.8¢) and available in assortment packs. Up to 2200uf is still pretty cheap, 7.5¢ with a 1000uF@10v cap coming in around 5.6¢. Beyond this, the goes up rapidly for either additional capacitance or voltage with a 2200uF@25v around 50¢. Ceramics are cheap up to 100nf, also available in assortment packs (0.4¢). Inductors Small inductors are fairly cheap; assortment packs of 1/2w from 1uH to 4.7mH 5.5¢ a piece. They look like resistors. Fuses Pico fuses are pretty cheap. About $0.20 a piece. Learned the hard way after blowing my new breadboard supply. Connectors Description Cost Notes Banana Plug $3.94 / 20 Spring Terminal $1 / 2-terminal-block These come in a wide range of sizes PCB Terminal Blocks $5.75 / 50x 2-terminal-block Also come in a variety of sizes. 5.5x2.1mm DC socket $1.89 / 10 0.1" Headers Breakable Male 50x40-pin $8.75 For not much more, these come in colors 0.1" Headers Female (not breakable) 10x40-pin $1.18 Swiss Machine Pin 12x40-pin $5.70 0.1" Headers Breakable Female USB A PCB socket $4 / 10 3.5mm Socket $2 / 10 cable transition connector $4.90 / 25 Works with Ribbon cable, doesn't vary much regardless of pins DIP sockets $1 / 10 Easily swap out IC chips, good for programming microcontrollers Micro USB $3.15 / 10 This includes a small board, the raw socket is cheaper, it's smd. Cables Name Wires Cost Notes Cat5 4x twisted pairs $10 / 150' very long lengths are cheaper per ft ($50/1000') 1.27mm Pitch Ribbon Cable 4, 8, 10, 16, 26, 40 around $1/3' Uses special connectors Ribbon cables have special connectors that convert the 1.27mm pitch cable into dual 2.54mm pitch sockets. Also, network cables aren't a bad choice, pre-made 0.5ft cables are about $0.60 and that gets us 8 wires. Wire Type Cost Notes 22 AWG Solid Core $10.35 / 100' breadboards and prototyping 24 AWG Solid Core $23.80 / 250' prototyping, maybe breadboards 26 AWG Tinned Copper Wire $8.75 / 100' good for perf boards Circuit Boards Description Cost Source Cost Copper Clad Board 36 x 4"x6" $22 2.5¢ insq Ferric Chloride 4 oz dry / 1L wet $11 Perf Board 10 7x5cm $5.25 9.5¢ insq Bread Board Standard Size $2.50 Shield Bread Board Sized for Arduino shields $2 / 5 Breakout Boards Convert smd to dip ~2¢ Dev Boards Name Cost Details RasPi 2 B $39 900MHz, 1G ram, HDMI, micro sd RasPi 2 B+ $30 700MHz, 512M ram, HDMI, micro sd RasPi 2 A+ $25 700MHz, 256M ram, HDMI, micro sd Name Cost Details Arduino Nano $2.21 14 IO (6PWM 8ADC) 16K 16MHz Hardware Name Cost Details 12mm Knob $2.50 / 10 Common size for pots, switches and rotary encoders. Standoffs $2.20 / 50 M3 8mm Standoff Screws $5.20 / 100 nylon M3 5mm ABS Project Box $3.5 / 5 100x60x25mm (9.3x2.3x1") Aluminum Project Box $9 / 5 100x100x50mm ABS Sheet $0.024 / insq DIY box, weld with a soldering iron, almost as expensive as copper clad boards Aluminum Sheet $0.07 / insq Polypropylene Sheet $0.014 / insq PVC Sheet $0.021 / insq Hardboard $0.0017 / insq That's right, best by an order of magnitude. Homedepot, not eBay.