# Little Hardware Controller ## Description This circuit can take an analog input, control a DC gearmotor, sense its direction and cumulative number of revolutions, and turn on and off three LEDs, in whatever way it is programmed. It can be repeatedly reprogrammed through a connector on the PCB. Powered by six AA batteries, it economizes on power by disconnecting some components when they are not in use. ## Project Details - **Owner:** cobrecht0256 - **Created:** 2/19/2024 - **Last Updated:** 9/5/2024 - **Visibility:** Public ## Key Components ### BAT1 — BC2AAPC - Manufacturer Part Number: BC2AAPC - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1086/BC2AAPC.pdf - Manufacturer Name: MPD (Memory Protection Devices) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - - [pin 2] - + [pin 1] ### BAT2 — BC2AAPC - Manufacturer Part Number: BC2AAPC - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: MPD (Memory Protection Devices) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1086/BC2AAPC.pdf - Part Type: Connector **Pins:** - - [pin 2] - + [pin 1] ### BAT3 — BC2AAPC - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1086/BC2AAPC.pdf - Manufacturer Name: MPD (Memory Protection Devices) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: BC2AAPC **Pins:** - - [pin 2] - + [pin 1] ### J1 - Programmer Connector — Pin Header 01x04 2.54mm Vertical - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### J2 - Motor Connector — Pin Header 01x06 2.54mm Vertical - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] ### LED1 — WP7113SRD/D - Manufacturer Name: Kingbright - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP7113SRD-D.pdf - Manufacturer Part Number: WP7113SRD/D - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED - Forward Voltage: 1.85V **Pins:** - A [pin 2] - K [pin 1] ### LED2 — WP7113SRD/D - Manufacturer Part Number: WP7113SRD/D - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP7113SRD-D.pdf - Manufacturer Name: Kingbright - Forward Voltage: 1.85V - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### LED3 — WP7113SRD/D - Manufacturer Part Number: WP7113SRD/D - Manufacturer Name: Kingbright - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP7113SRD-D.pdf - Forward Voltage: 1.85V - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — BC33740TA - Manufacturer Name: onsemi - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BC33740TA - Datasheet URL: https://www.verical.com/datasheet/on-semiconductor-bjt---general-purpose-BC33740TA-4544246.pdf **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### Q2 — BC327 - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Fairchild Semiconductor - Datasheet URL: https://rocelec.widen.net/view/pdf/bf4hzzrx8f/ONSMS10884-1.pdf?t.download=true&u=5oefqw - Manufacturer Part Number: BC327 **Pins:** - B [pin 2] - C [pin 1] - E [pin 3] ### U1 - Voltage Regulator — 7805 - License: https://creativecommons.org/licenses/by/4.0/ - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 7805 - Manufacturer Name: Foshan Blue Rocket Elec - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Foshan-Blue-Rocket-Elec-7805_C305416.pdf - Part Type: Integrated Circuit **Pins:** - GND [pin 2] - VI [pin 1] - VO [pin 3] ### U2 - ATmega328 — ATMEGA328P-PU V2 - Manufacturer Name: Microchip Technology Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Microcontroller - Manufacturer Part Number: ATMEGA328P-PU - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf **Pins:** - ~SS~/OC1B/PCINT2/PB2 [pin 16] - ADC0/PCINT8/PC0 [pin 23] - ADC1/PCINT9/PC1 [pin 24] - ADC2/PCINT10/PC2 [pin 25] - ADC3/PCINT11/PC3 [pin 26] - ADC4/SDA/PCINT12/PC4 [pin 27] - ADC5/SCL/PCINT13/PC5 [pin 28] - AIN0/OC0A/PCINT22/PD6 [pin 12] - AIN1/PCINT23/PD7 [pin 13] - AREF [pin 21] - AVCC [pin 20] - GND_1 [pin 8] - GND_2 [pin 22] - ICP1/CLKO/PCINT0/PB0 [pin 14] - INT0/PCINT18/PD2 [pin 4] - INT1/OC2B/PCINT19/PD3 [pin 5] - MISO/PCINT4/PB4 [pin 18] - MOSI/OC2A/PCINT3/PB3 [pin 17] - OC1A/PCINT1/PB1 [pin 15] - PB6/PCINT6/XTAL1/TOSC1 [pin 9] - PB7/PCINT7/XTAL2/TOSC2 [pin 10] - PC6/PCINT14/~RESET~ [pin 1] - RXD/PCINT16/PD0 [pin 2] - SCK/PCINT5/PB5 [pin 19] - T0/XCK/PCINT20/PD4 [pin 6] - T1/OC0B/PCINT21/PD5 [pin 11] - TXD/PCINT17/PD1 [pin 3] - VCC [pin 7] ### U3 - L293D — L293D - Manufacturer Part Number: L293D - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/04/ac/22/f9/20/5d/43/a1/CD00000059.pdf/files/CD00000059.pdf/jcr:content/translations/en.CD00000059.pdf - Manufacturer Name: STMicroelectronics - Part Type: Integrated Circuit **Pins:** - 1A [pin 2] - 1Y [pin 3] - 2A [pin 7] - 2Y [pin 6] - 3A [pin 10] - 3Y [pin 11] - 4A [pin 15] - 4Y [pin 14] - EN1,2 [pin 1] - EN3,4 [pin 9] - GND [pin 5] - GND [pin 12] - GND [pin 4] - GND [pin 13] - VCC1 [pin 16] - VCC2 [pin 8] ### U4 - GPIO Expander — PCF8575 Module Board - Substitute Manufacturer Part Number: PCF8575 - Manufacturer Name: ACEIRMC - Purchase Url: https://www.amazon.com/ACEIRMC-PCF8575-Expander-Extension-Arduino/dp/B09DFWS722/ref=asc_df_B09DFWS722/?tag=hyprod-20&linkCode=df0&hvadid=647248209079&hvpos=&hvnetw=g&hvrand=8987464934207469670&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9022196&hvtargid=pla-1884071908695&mcid=ccc1fe5ad93937b28c49a75132adf43b&th=1 - Datasheet URL: https://www.ti.com/lit/ds/symlink/pcf8575.pdf?ts=1708321218294&ref_url=https%253A%252F%252Fwww.google.com%252F - Operating Voltage: 5V - Part Type: I/O Expanders - Current: 0.1A **Pins:** - ~INT - GND - GND - GND - P00 - P01 - P02 - P03 - P04 - P05 - P06 - P07 - P10 - P11 - P12 - P13 - P14 - P15 - P16 - P17 - SCL - SDA - VCC - VDD - VDD *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/cobrecht0256/little-hardware-controller~ov](https://www.flux.ai/cobrecht0256/little-hardware-controller~ov).* --- *Generated from [https://www.flux.ai/cobrecht0256/little-hardware-controller~ov](https://www.flux.ai/cobrecht0256/little-hardware-controller~ov)*