Document Source: https://kitsandparts.com/tutorials/ATtiny13A.parts.list.php Project developed by W8DIZ, 30 Sep 2021, updated 30 Oct 2021. This Project is totally open source; No Rights Reserved, especially for China. This text document is the Parts List for the ATtiny13A/45/85 ASM tutorial project. Click me for Project Schematic Click me for Project PCB Layout NOTE1: Any conflict between Schematic & PCB, the Schematic takes precedence. All 100n capacitors are supplied as 1206 SMDs. You have the option of using your own 100n (0.1uF) thru-hole caps. NOTE2: Select between Direct Connect crystal or External Clock. Direct Connect 25 MHz crystal is the most popular option. NOTE3: The SMD capacitors are not marked. The single 47pF cap is lighter in color then the remaining 100n caps. NOTE4: All 100n caps included in the kit are 1206 SMDs. You may substitue your own thru hole 100n caps. External Clock: C1 47pF disc NPO or 47pF 1206 SMD C2 5-30 pF ceramic trimmer cap (should be able to calibrate X1 to it's exact frequency) C5 100n 1206 SMT coupling capacitor C10 100n 1206 SMT 3V3 power supply de-coupling capacitor for U1 R1 1M 1206 SMD X1 with 2 machine socket pins - Not Included! You supply. U1 Not Included! 74HCU04N hex inverter with 14 pin DIP socket Direct Connect crystal: X2 CX3225SB25000 (25 MHz) Kyocera SMT Crystal, included. Optional: CX3225SB27000 (27 MHz) Kyocera SMT Crystal. Remaining Common Parts for the ATtiny13A/45/85 ASM tutorial project: C3 100n 1206 SMT, LCD power supply de-coupling capacitor C4 100n 1206 SMT, U2 Shift Register power supply de-coupling capacitor C6 100n 1206 SMT, Tuning Voltage noise reducing capacitor C7 100n 1206 SMT, U4 ATtiny power supply de-coupling capacitor C9 100n 1206 SMT, Si5351A power supply de-coupling capacitor C8,11,12 10uF 1206 SMT, U5 and U6 regulators input/output filter capacitors C13 100n 1206 SMT, U5 and U6 regulators input filter capacitors C14 100n 1206 SMT, U5 regulators output filter capacitors D1 1N4001 or 1N5817 reverse polarity protection diode J1 two LCD Headers 1x16 for common 14 or 16 pin common/standard LCDs with two 8-pin female cables to connect LCD to PCB J2 ATtiny Microprocessor Programming Header 2x3 J3 12 Volt power supply header 1x3 (can handle 7.5-15 volts) with one 3-pin female cable J4 Clocks Output Header 2x3 J5 Potentiometer Header 1x3 for A/D input to ATtiny; freq tune pot connection J6 adafruit clock gen header Header 1x7 - will also work for qrp-Labs clock module LCD Standard/Common HD44780 14 or 16 pin LCD module, 2 lines x 16 characters Blue or Green backlight. (you select one or the other) LED1 Green LED used for first ASM code project - make it blick at a specific rate LED2 Yellow LED Power_On indicator (5 volts applied to circuits) Q1,2 2N7000 MOSFETS used for 5 volt to 3.3 volt logic level shifting R2 2K 1206 SMT used for voltage limiting inconjunction with R3 R3 2K thru hole potentiometer LCD contract adjust R4 10 Ohm 1206 SMT used for current limiting in conjunction with R5 (LCD Backlight Brightness) R5 100 Ohm thru hole potentiometer LCD brightness adjust R6 470 Ohm 1206 SMT used for current protection in case of PB3 Output Configuration Errors R7,12 604 Ohm 1206 SMT used for current limiting for LEDs R8,9,10,11 2K 1206 SMT used as pull-ups for 3v3 and 5v0 voltage level converters Note: The 10 ohm resistor connected to D1 and C12, labeled R11, should be labeled R13 as on the schematic. R13 10 ohm 1/8th watt limit resistor; acts as a fuse Q1,2 2N7000 MOSfets used as voltage level translators between teh 5351 clock chip and the ATtiny chip U2 74HC164N Shift Register to transfer data to the LCD U3 MS5351M SMT Clock Chip - substitute of Si5351A (very very very small) U4 ATtiny CPU. ATtiny85 included. Can also handle ATtiny13A, ATtiny25 and ATtiny45 U5a 78M05 5 volt 500 mA voltage regulator (included) U5b 78L05 5 volt 100 mA voltage regulator (not included) U6 78L33 3.3 volt 100 mA voltage regulator