The following table shows the parts list for the Automatic Reversing Circuit - Mk VII. The list shows the Digi-Key stock numbers as well as the schematic part numbers
The 1/4 watt resistors are only available in multiples of 5 so there will be resistors left over after the circuit is built.
| CIRCUIT PART NUMBER | - | DESCRIPTION | - | DigiKey Part | - | Qty |
| - | - | Semiconductors | - | - | - | - |
| IC 1 | - | LM339 QUAD Comparator | - | LM339NFS-ND | - | 1 |
| IC 2 | - | 7400 Quad NAND Gate | - | TC74AC00PF-ND | - | 1 |
| IC 3 | - | LM556 Dual Timer | - | LM556CNFS-ND | - | 1 |
| IC 4 | - | LM358 Dual OPAMP | - | LM358NFS-ND | - | 1 |
| IC 5 | - | 5 Volt Regulator (TO-220) | - | LM7805CT-ND | - | 1 |
| Q1, 2, 3, 4 | - | Phototransitors | - | 160-1030-ND | - | 4 |
| Q 6, 8, 9 | - | 2N3904 | - | 2N3904FS-ND | - | 3 |
| Q5 | - | 2N3906 | - | 2N3906FS-ND | - | 1 |
| Q7 (TIP142) | - | NPN Darlington TO-218 | - | TIP142GOS-ND | - | 1 |
| CR1 | - | 4 Amp Bridge Rectifier | - | RS401LDI-ND | - | 1 |
| LED1, 2, 3, 4, 5, 6 | - | Green LED, 3mm | - | 160-1710-ND | - | 6 |
| LED7 | - | Red LED, 3mm | - | 160-1139-ND | - | 1 |
| D1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13 | - | Small Signal Diode | - | 1N4148DICT-ND | - | 12 |
| D11 | - | 1 AMP / 50 Volt Diode | - | 1N4001DICT-ND | - | 1 |
| - | - | Resistors | - | - | - | - |
| R1, 4 | - | 390K ohm - 0.25W | - | 390KQBK-ND | - | 2 |
| R2, 3 | - | 470K ohm - 0.25W | - | 470KQBK-ND | - | 2 |
| R5, 6, 13, 19, 25 | - | 100K ohm - 0.25W | - | 100KQBK-ND | - | 5 |
| R7, 8, 9, 10, 11, 14, 17, 20, 24 | - | 470 ohm - 0.25W | - | 470QBK-ND | - | 9 |
| R15, 16, 28 | - | 10K ohm - 0.25W | - | 10KQBK-ND | - | 3 |
| R21, 22, 23, 31 | - | 3.3K ohm - 0.25W | - | 3.3KQBK-ND | - | 2 |
| R30 | - | 22K ohm - 0.25W | - | 22KQBK-ND | - | 1 |
| R32 | - | 0.62 ohm - 1W | - | 0.62W-2-ND | - | 1 |
| R33 | - | 1K ohm - 0.25W | - | 1.0KQBK-ND | - | 1 |
| - | - | Potentiometers | - | - | - | - |
| R12, 18, 26 | - | 1M Potentiometer | - | 3352T-105LF-ND | - | 3 |
| R27 | - | 250K Potentiometer | - | 3352T-254LF-ND | - | 1 |
| R29 | - | 10K Potentiometer | - | 3352T-103LF-ND | - | 1 |
| - | - | Capacitors | - | - | - | |
| C1, 2, 3, 4 | - | 0.33uF / 63V | - | 495-2548-ND | - | 4 |
| C5, 6 | - | 330uF / 35V | - | P5167-ND | - | 2 |
| C7, 10 | - | 10uF / 50V | - | P5178-ND | - | 2 |
| C8 | - | 2200uF / 35V | - | P5170-ND | - | 1 |
| C9 | - | 100uF / 100V | - | P5313-ND | - | 1 |
| - | - | Other Parts | - | - | - | - |
| VR 1 Heatsink | - | TO-220 .375" Compact | - | HS106-ND | - | 1 |
| Q7 Heatsink | - | TO-218 W/Pins 1.5"Tall | - | HS349-ND | - | 1 |
| RELAY 1 | - | Relay DPDT 2A 5VDC | - | Z123-ND | - | 1 |
| Terminal Blocks (See notes) | - | 2 Position - 5mm | - | ED1601-ND | - | 5 or 6 |
| Terminal Block (See notes) | - | 2 Position - 3.5mm | - | ED1514-ND | - | 1 or 0 |
Print this diagram to aid in assembling the circuitboard.
The following table shows the parts list for the Automatic Reversing Circuit - Mk VII. The list shows the Digi-Key stock numbers as well as the schematic part numbers
The 1/4 watt resistors are only available in multiples of 5 so there will be resistors left over after the circuit is built.
| CIRCUIT PART NUMBER | - | DESCRIPTION | - | DigiKey Part | - | Qty |
| - | - | Semiconductors | - | - | - | |
| IC 1 | - | LM393 Dual Comparator | - | LM393AN-ND | - | 1 |
| IC 3 | - | LM556 Dual Timer | - | LM556CNFS-ND | - | 1 |
| Q1, 2, 3 | - | Phototransitors | - | 160-1030-ND | - | 4 |
| Q4, 5 | - | 2N3904 | - | 2N3904FS | - | 3 |
| LED1, 2 | - | Green LED, 3mm | - | 160-1710-ND | - | 6 |
| D1, 2 | - | Small Signal Diode | - | 1N4148DICT-ND | - | 2 |
| - | - | - | ||||
| - | - | Resistors | - | - | - | |
| R1, 2 | - | 470K ohm - 0.25W | - | 470KQBK-ND | - | 2 |
| R3, 4, 13, 14 | - | 10K ohm - 0.25W | - | 10KQBK-ND | - | 4 |
| R5, 6, 9, 10 | - | 100K ohm - 0.25W | - | 100KQBK-ND | - | 5 |
| R7 | - | 1M ohm - 0.25W | - | 1.0MQBK-ND | - | 1 |
| R11, 12 | - | 470 ohm - 0.25W | - | 470QBK-ND | - | 2 |
| R15 | - | 22K ohm - 0.25W | - | 22KQBK-ND | - | 1 |
| - | - | Potentiometers | - | - | - | |
| R8 | - | 1M Potentiometer | - | 3352T-105LF-ND | - | 1 |
| - | - | Capacitors | - | - | - | |
| C1, 6 | - | 0.33uF / 63V | - | 495-2548-ND | - | 2 |
| C2, | - | 4.7uF / 50V | - | P5177-ND | - | 1 |
| C3, 7 | - | 1.0uF / 50V | - | P5174-ND | - | 2 |
| C4 | - | 47uF / 35V | - | P5181-ND | - | 1 |
| C5 | - | 22uF / 35V | - | P5179-ND | - | 1 |
| - | - | Optional | - | - | - | |
| Terminal Blocks (See notes) | - | 3 Position - 3.5mm | - | ED1515-ND | - | 1 |
| Terminal Block (See notes) | - | 4 Position - 3.5mm | - | ED1516-ND | - | 1 |
Print this diagram to aid in assembling the circuitboard.
The explanations for the circuits on these pages cannot hope to cover every situation on every layout. For this reason be prepared to do some experimenting to get the results you want. This is especially true of circuits such as the "Across Track Infrared Detection" circuits and any other circuit that relies on other than direct electronic inputs, such as switches.
If you use any of these circuit ideas, ask your parts supplier for a copy of the manufacturers data sheets for any components that you have not used before. These sheets contain a wealth of data and circuit design information that no electronic or print article could approach and will save time and perhaps damage to the components themselves. These data sheets can often be found on the web site of the device manufacturers.
Although the circuits are functional the pages are not meant to be full descriptions of each circuit but rather as guides for adapting them for use by others. If you have any questions or comments please send them to the email address on the Circuit Index page.
20 February, 2010