Difference between revisions of "Soldering 101"
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== Circuit == | == Circuit == | ||
| − | * A discrete astable BJT multivibrator feeding into a | + | * A discrete astable BJT multivibrator feeding into a 74HC595 shift register, which drives the LEDs directly. |
| − | * The | + | * The shift register can serve up to 8 segments. |
| − | * The LED matrix can | + | * The LED matrix can partitioned arbitrarily column-wise: multiple columns can be grouped onto a single counter output. |
| − | * each | + | * each shift register output has one series current limiting resistor |
| − | * | + | * multiple display modes: |
| + | ** blink (CLK goes into enable) | ||
| + | ** fill slowly, clear slowly (last output inverted feeds back) | ||
| + | ** fill slowly, clear at once (last output inverted goes to reset) | ||
| + | ** rotate (last output feeds back) | ||
* multivibrator speed can be adjusted with a pot | * multivibrator speed can be adjusted with a pot | ||
* on/off switch? | * on/off switch? | ||
| Line 18: | Line 22: | ||
* LED, $0.04650 @ 1000: http://search.digikey.com/us/en/products/WP710A10SRD%2FD/754-1593-ND/2769819 | * LED, $0.04650 @ 1000: http://search.digikey.com/us/en/products/WP710A10SRD%2FD/754-1593-ND/2769819 | ||
| − | * | + | * CD74HC164EE4-ND $ 0.30994 @ 100: http://www.digikey.ch/product-detail/de/CD74HC164EE4/CD74HC164EE4-ND/1506713 |
| + | * DIL14 Sockets @ 100: http://www.digikey.ch/product-detail/de/1-390261-3/A100205-ND/1125623 (Easier to change the IC if you kill it (wrong wiring, wrong polarity may kill the IC...)) | ||
| + | * 100nF (long leads) Capacitors @ 100: http://ch.farnell.com/multicomp/mc0805224z500a5-08mm/capacitor-ceramic-0-22uf-50v5v/dp/1694344 (Pour le découplage de l'alim près des IC, à monter sur les sockets) | ||
* CR2032 holder, $0.4968 @ 100: http://search.digikey.com/us/en/products/3003/3003K-ND/227448 | * CR2032 holder, $0.4968 @ 100: http://search.digikey.com/us/en/products/3003/3003K-ND/227448 | ||
| + | * Pushbutton, $0.0916 @ 100: http://search.digikey.com/us/en/products/FSM4JH/450-1650-ND/1632536 | ||
| + | * Pot, $0.3197 @ 100: http://search.digikey.com/us/en/products/3306P-1-105/3306P-105-ND/84994 | ||
| + | * Jumper, $0.04516 @ 500: http://search.digikey.com/us/en/products/NPC02SXON-RC/S9341-ND/2618266 | ||
| + | * Male header (36 pos), $0.62350 @ 100: http://search.digikey.com/us/en/products/68000-236HLF/609-3465-ND/2023290 | ||
| + | * PCB 5cm x 10cm, $1.498 @ 50: http://www.seeedstudio.com/depot/fusion-pcb-service-p-835.html | ||
Latest revision as of 22:04, 16 May 2012
Intro to through-hole soldering
We will solder a blinking, customizable name tag. We will also discuss and explain the design and the theory of operation.
Circuit
- A discrete astable BJT multivibrator feeding into a 74HC595 shift register, which drives the LEDs directly.
- The shift register can serve up to 8 segments.
- The LED matrix can partitioned arbitrarily column-wise: multiple columns can be grouped onto a single counter output.
- each shift register output has one series current limiting resistor
- multiple display modes:
- blink (CLK goes into enable)
- fill slowly, clear slowly (last output inverted feeds back)
- fill slowly, clear at once (last output inverted goes to reset)
- rotate (last output feeds back)
- multivibrator speed can be adjusted with a pot
- on/off switch?
Components
- LED, $0.04650 @ 1000: http://search.digikey.com/us/en/products/WP710A10SRD%2FD/754-1593-ND/2769819
- CD74HC164EE4-ND $ 0.30994 @ 100: http://www.digikey.ch/product-detail/de/CD74HC164EE4/CD74HC164EE4-ND/1506713
- DIL14 Sockets @ 100: http://www.digikey.ch/product-detail/de/1-390261-3/A100205-ND/1125623 (Easier to change the IC if you kill it (wrong wiring, wrong polarity may kill the IC...))
- 100nF (long leads) Capacitors @ 100: http://ch.farnell.com/multicomp/mc0805224z500a5-08mm/capacitor-ceramic-0-22uf-50v5v/dp/1694344 (Pour le découplage de l'alim près des IC, à monter sur les sockets)
- CR2032 holder, $0.4968 @ 100: http://search.digikey.com/us/en/products/3003/3003K-ND/227448
- Pushbutton, $0.0916 @ 100: http://search.digikey.com/us/en/products/FSM4JH/450-1650-ND/1632536
- Pot, $0.3197 @ 100: http://search.digikey.com/us/en/products/3306P-1-105/3306P-105-ND/84994
- Jumper, $0.04516 @ 500: http://search.digikey.com/us/en/products/NPC02SXON-RC/S9341-ND/2618266
- Male header (36 pos), $0.62350 @ 100: http://search.digikey.com/us/en/products/68000-236HLF/609-3465-ND/2023290
- PCB 5cm x 10cm, $1.498 @ 50: http://www.seeedstudio.com/depot/fusion-pcb-service-p-835.html
