555 Timer Project -- The Learning Circuit 67

Matt — Wed, 13 Nov 2019 08:24:00 GMT

Current Revision posted to Documents by Matt on 11/13/2019 8:24:00 AM

555 Timer Project | Flashing LED Headband

The Learning Circuit | element14 presents | Project Videos

www.youtube.com/watch

555 timers are one of the most popular and versatile ICs on the market. In the previous lesson, we learned how 555 timers get used in circuits. There are three main types of circuits in which they are used, monostable, bistable, and astable. Astable circuits are likely the most common use for 555 timers. In this episode, Karen shows how to create an astable circuit using a 555 timer. Follow along as she uses resistors and capacitors to create an RC circuit to affect the timing of the circuit. Karen’s final circuit uses a 4-position DIP switch to allow for the use of 4 different resistors and therefore 4 speeds to control the flashing of LEDs. While Karen uses this circuit to create flashing lights on a headband and a hat, the uses are endless. Try your hand at making the circuit and use it to make art, on decorations, or create warning lights. Come up with other ideas for how to use this circuit and post them in the comments below!

Final Schematic	Circuit Layout

Supplemental Content:

Bill of Material:

Product Name	Manufacturer	Quantity	Buy KitBuy Kit
Electrolytic Capacitor, Miniature, 10 µF, 25 V, 515D Series, ± 20%, Radial Leaded, 5 mm	Vishay	1	Buy NowBuy Now
Ceramic Disc Capacitor, 0.01 µF, 100 V, ± 20%, 5 mm	Vishay	1	Buy NowBuy Now
LM555CN - Timer, Oscillator & Pulse Generator IC, TTL Compatible, Astable, Monostable, 4.5 V to 16 V, DIP-8	On Semiconductor	1	Buy NowBuy Now
Through Hole Resistor, 220 ohm, 400 mW, ± 1%	Vishay	1	Buy NowBuy Now
Through Hole Resistor, 1 kohm, 500 mW, ± 1%	TT ELECTRONICS / WELWYN	1	Buy NowBuy Now
Through Hole Resistor, 22 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 47 kohm, 250 mW, - 1%, 200 V, Axial Leaded	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 100 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 220 kohm, 250 mW, ± 1%, Axial Leaded, 250 V	Multicomp	1	Buy NowBuy Now
Prototype Board, 25 x 15 grid, 1.6 mm, 72 mm, 47 mm	Multicomp	1	Buy NowBuy Now
LED, Cool White, Through Hole, T-1 3/4 (5mm), 20 mA, 3.2 V	Cree		Buy NowBuy Now
Slide Switch, SPDT, On-On, 2.54mm, Through Hole, Side, 4 A, 250 V	APEM	1	Buy NowBuy Now
DIP / SIP Switch, Raised Rocker, 4 Circuits, Rocker, Through Hole, SPST, 30 VDC, 150 mA	GRAYHILL	1	Buy NowBuy Now
2226TG -Contact, 2226 Series, Socket, Crimp, 24 AWG, Pin	Multicomp	2	Buy NowBuy Now
2226A-02 -Connector Housing, 2226 Series, Receptacle(Female), 2 Positions, 2.54 mm	Multicomp	1	Buy NowBuy Now
Wire-To-Board Connector, 2.54 mm, 2 Contacts, Header, Male, 90deg	AMP - TE CONNECTIVITY	1	Buy NowBuy Now
9V battery snap, flexible	Multicomp	1	Buy NowBuy Now
Battery, 9 V, PP3, Alkaline, 565 mAh	Pro Elec	1	Buy NowBuy Now
Hook-up Wire Spool Set - 22AWG Solid Core - 10 x 25ft	Adafruit	1	Buy NowBuy Now

Additional Parts:

Product Name
LED strand or chosen Light source

Tags: through hole resistors, e14presents_karencorbeill, e14presents_makerkaren, electrolytic capacitors, the learning circuit, 555 timer, led, 555 timers, multicomp, 555

The Learning Circuit 67: 555 Timer Project | Flashing LED Headband

kellyhensen — Thu, 14 Jul 2022 14:04:45 GMT

Revision 2 posted to Documents by kellyhensen on 7/14/2022 2:04:45 PM

555 Timer Project | Flashing LED Headband

The Learning Circuit | element14 presents | Project Videos

www.youtube.com/watch

Final Schematic	Circuit Layout

Supplemental Content:

Bill of Material:

Product Name	Manufacturer	Quantity	Buy KitBuy Kit
Electrolytic Capacitor, Miniature, 10 µF, 25 V, 515D Series, ± 20%, Radial Leaded, 5 mm	Vishay	1	Buy NowBuy Now
Ceramic Disc Capacitor, 0.01 µF, 100 V, ± 20%, 5 mm	Vishay	1	Buy NowBuy Now
LM555CN - Timer, Oscillator & Pulse Generator IC, TTL Compatible, Astable, Monostable, 4.5 V to 16 V, DIP-8	On Semiconductor	1	Buy NowBuy Now
Through Hole Resistor, 220 ohm, 400 mW, ± 1%	Vishay	1	Buy NowBuy Now
Through Hole Resistor, 1 kohm, 500 mW, ± 1%	TT ELECTRONICS / WELWYN	1	Buy NowBuy Now
Through Hole Resistor, 22 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 47 kohm, 250 mW, - 1%, 200 V, Axial Leaded	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 100 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 220 kohm, 250 mW, ± 1%, Axial Leaded, 250 V	Multicomp	1	Buy NowBuy Now
Prototype Board, 25 x 15 grid, 1.6 mm, 72 mm, 47 mm	Multicomp	1	Buy NowBuy Now
LED, Cool White, Through Hole, T-1 3/4 (5mm), 20 mA, 3.2 V	Cree		Buy NowBuy Now
Slide Switch, SPDT, On-On, 2.54mm, Through Hole, Side, 4 A, 250 V	APEM	1	Buy NowBuy Now
DIP / SIP Switch, Raised Rocker, 4 Circuits, Rocker, Through Hole, SPST, 30 VDC, 150 mA	GRAYHILL	1	Buy NowBuy Now
2226TG -Contact, 2226 Series, Socket, Crimp, 24 AWG, Pin	Multicomp	2	Buy NowBuy Now
2226A-02 -Connector Housing, 2226 Series, Receptacle(Female), 2 Positions, 2.54 mm	Multicomp	1	Buy NowBuy Now
Wire-To-Board Connector, 2.54 mm, 2 Contacts, Header, Male, 90deg	AMP - TE CONNECTIVITY	1	Buy NowBuy Now
9V battery snap, flexible	Multicomp	1	Buy NowBuy Now
Battery, 9 V, PP3, Alkaline, 565 mAh	Pro Elec	1	Buy NowBuy Now
Hook-up Wire Spool Set - 22AWG Solid Core - 10 x 25ft	Adafruit	1	Buy NowBuy Now

Additional Parts:

Product Name
LED strand or chosen Light source

Tags: through hole resistors, e14presents_karencorbeill, e14presents_makerkaren, electrolytic capacitors, the learning circuit, 555 timer, led, 555 timers, multicomp, 555

The Learning Circuit 67: 555 Timer Project | Flashing LED Headband

tariq.ahmad — Wed, 15 Apr 2020 13:41:16 GMT

Revision 1 posted to Documents by tariq.ahmad on 4/15/2020 1:41:16 PM

555 Timer Project | Flashing LED Headband

The Learning Circuit | element14 presents | Project Videos

www.youtube.com/watch

Final Schematic	Circuit Layout

Supplemental Content:

Bill of Material:

Product Name	Manufacturer	Quantity	Buy KitBuy Kit
Electrolytic Capacitor, Miniature, 10 µF, 25 V, 515D Series, ± 20%, Radial Leaded, 5 mm	Vishay	1	Buy NowBuy Now
Ceramic Disc Capacitor, 0.01 µF, 100 V, ± 20%, 5 mm	Vishay	1	Buy NowBuy Now
LM555CN - Timer, Oscillator & Pulse Generator IC, TTL Compatible, Astable, Monostable, 4.5 V to 16 V, DIP-8	On Semiconductor	1	Buy NowBuy Now
Through Hole Resistor, 220 ohm, 400 mW, ± 1%	Vishay	1	Buy NowBuy Now
Through Hole Resistor, 1 kohm, 500 mW, ± 1%	TT ELECTRONICS / WELWYN	1	Buy NowBuy Now
Through Hole Resistor, 22 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 47 kohm, 250 mW, - 1%, 200 V, Axial Leaded	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 100 kohm, 250 mW, ± 1%, Axial Leaded, 200 V	TE Connectivity	1	Buy NowBuy Now
Through Hole Resistor, 220 kohm, 250 mW, ± 1%, Axial Leaded, 250 V	Multicomp	1	Buy NowBuy Now
Prototype Board, 25 x 15 grid, 1.6 mm, 72 mm, 47 mm	Multicomp	1	Buy NowBuy Now
LED, Cool White, Through Hole, T-1 3/4 (5mm), 20 mA, 3.2 V	Cree		Buy NowBuy Now
Slide Switch, SPDT, On-On, 2.54mm, Through Hole, Side, 4 A, 250 V	APEM	1	Buy NowBuy Now
DIP / SIP Switch, Raised Rocker, 4 Circuits, Rocker, Through Hole, SPST, 30 VDC, 150 mA	GRAYHILL	1	Buy NowBuy Now
2226TG -Contact, 2226 Series, Socket, Crimp, 24 AWG, Pin	Multicomp	2	Buy NowBuy Now
2226A-02 -Connector Housing, 2226 Series, Receptacle(Female), 2 Positions, 2.54 mm	Multicomp	1	Buy NowBuy Now
Wire-To-Board Connector, 2.54 mm, 2 Contacts, Header, Male, 90deg	AMP - TE CONNECTIVITY	1	Buy NowBuy Now
9V battery snap, flexible	Multicomp	1	Buy NowBuy Now
Battery, 9 V, PP3, Alkaline, 565 mAh	Pro Elec	1	Buy NowBuy Now
Hook-up Wire Spool Set - 22AWG Solid Core - 10 x 25ft	Adafruit	1	Buy NowBuy Now

Additional Parts:

Product Name
LED strand or chosen Light source

Tags: through hole resistors, e14presents_karencorbeill, e14presents_makerkaren, electrolytic capacitors, the learning circuit, led, 555 timers, multicomp