AC Dimmer

Category:

Power Electronics

Author:

Shane Oberloier

Post date:

December 11, 2017 - 2:15am

UPL Compliant:

Yes

Tested:

Rating:

Average: 2 (1 vote)

Tags:

Motor controller, AC, Lighting

Design Description:

This AC dimmer circuit utilizes a zero crossing detector and Triac. The output power can be controlled by adjusting a potentiometer value. The max current allowed is 10A (limited by the Triac).

This device can control the power delivered to any type of AC device, not just lamps. It can work on AC motors, heaters, power supplies,etc.

The code must still be created for the ATTiny85, Feel free to volunteer!

Design Videos:

Disclaimer

This board has not been tested - nor is it guaranteed to work as specified. The designer holds no responsibility for any damages that may arise from using, testing, or fabricating this circuit.

Bill of Material


Component	Description	Part	References	Value	Footprint	Quantity Per PCB	Datasheet	UPL #	Part #
1	SMD 0.1uF ceramic capacitor 50V [UPL 2.009]	0.1uF_c	C1 C2	0.1uF_c	C_1206_HandSoldering	2	https://www.digikey.com/short/qcd83j	2.009	CC1206JRX7R9BB104
2	Rectifier Diode, 400V, 3A [UPL 4.003]	Rectifier_Diode_3A	D1	Rectifier_Diode_3A	Diode_DO-201AD_Horizontal_RM15	1	https://www.digikey.com/short/q75wq2	4.003	1N5404RLG
3	Blade Fuse Holder [UPL 11.003]	FUSE_Blade	F1	FUSE_Blade	Fuse_Holder	1	https://www.digikey.com/short/q7wbwz	11.003	3522-2
4	Terminal Block, 2 Pos [UPL 10.003]	Term_2	J1 J2 J3	Term_2	TerminalBlock_Pheonix_MKDS1.5-2pol	3	https://www.digikey.com/short/q7wbhd	10.003	1935161
5	SMD 10K ohm resistor 1/4W [UPL 1.040]	10K	R2	10K	R_1206_HandSoldering	1	https://www.digikey.com/short/qcz4tt	1.040	RC1206FR-0710KL
6	SMD 1K ohm resistor 1/4W [UPL 1.028]	1K	R3	1K	R_1206_HandSoldering	1	https://www.digikey.com/short/qczz1d	1.028	RC1206FR-071KL
7	SMD 4K7 ohm resistor 1/4W [UPL 1.036]	4K7	R1	4K7	R_1206_HandSoldering	1	https://www.digikey.com/short/qcz47h	1.036	RC1206FR-074K7L
8	THT 10K ohm trimmer potentiometer 25 turn [UPL 1.070]	10k_t	RV1	10k_t	Potentiometer_Bourns_3296W_3-8Zoll_Inline_ScrewUp	1	https://www.digikey.com/short/qt5j3q	1.070	1-1623849-0
9	Microcontroller, 8 bit, 8KB flash ATTINY85-20PU [UPL 9.001]	ATTINY85	U3	ATTINY85	DIP-8_W7.62mm_LongPads	1	https://www.digikey.com/short/q7wbt2	9.001	ATTINY85-20PU
10	Opto-Isolator 5KV [UPL 12.001]	LTV-817	U1	LTV-817	DIP-4_W7.62mm_LongPads	1	https://www.digikey.com/short/q7wb0n	12.001	LTV-817
11	Triac, 12A 600V [UPL 4.029]	TRIAC	U2	TRIAC	TO-220_Neutral123_Vertical_LargePads	1	https://www.digikey.com/short/q75wvh	4.029	BTA212-600B/DG,127
Component Groups:	11
Component Count:	14
Fitted Components:	14
Number of PCBs:	1
Total components:	14
Schematic Version:
Schematic Date:
BoM Date:	Sun 10 Dec 2017 08:50:10 PM EST
Schematic Source:	/home/shane/Documents/OCI_Designs/AC_Dimmer/AC_Dimmer.sch
KiCad Version:	Eeschema 4.0.2+dfsg1-stable

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Design Files

Design Files:

AC_Dimmer.zip

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AC Dimmer

AC Dimmer