ELECT 35: generador de funcions basat en el XR2206
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hi ha la versió antiga i la versió nova:
la versió nova està a Sparkfun en forma de kit, però precisament hi ha una altra nova versió del kit, del qual tenim els fitxers del Eagle (Function-Generator-Kit-v15.zip):
Product Info Function Generator Kit sku: KIT-10015 Description: Nuxie and SparkFun worked together to rehash Nuxie's Function Generator Kit. This kit is based around the XR-2206 monolithic function generator IC, and can produce sine, triangle, and 5V square waves with frequencies ranging from 15Hz to over 500kHz. A selector switch allows you to pick either a sine or triangle wave to be output to the 'WAVE' pin. The amplitude of this wave can be adjusted from about 1V up to either 7V (triangle) or 5V (sine). A square wave is also emitted by the XR-2206, and run a couple times through an inverter to even the wave out. This wave will have a maximum of 5V, so it can be interfaced with a microcontroller or other TTL-level devices. There are two selectable frequency ranges as well. When the 'FREQ' switch is set to Low, the frequency can be adjusted from 15Hz to 4.5kHz. In the High position, the frequency can go from 3kHz to about 650kHz. Two pots are used to adjust the frequency, providing both coarse and fine adjustments. The XR-2206 can emit frequencies from 0.01Hz up to 1MHz, if you need a frequency that this kit doesn't provide, we've broken out a couple extra resistors (R8, and R9), to give you the ability to customize your kit. The XR-2206 requires a relatively high voltage for normal operation, this kit has it running at 12V. This means you'll need at least ~14VDC (no greater than 35V though!) to get the kit running at the optimal 12V. If you just want to use the 5V square wave output though, you could probably cheat and use a 9V wall adapter; we've used this in a few tests, and it hasn't caused us any problems. Assembly is straight-forward and can be done with a simple multimeter for testing resistor and potentiometer values. The board is labeled clearly and should be good for beginners. Lastly, if you'd like a quick and easy display of the frequency. This kit can be mated directly with our Frequency Counter Kit!
i el partlist:
Partlist Exported from Function-Generator-Kit-v15.sch at 10/05/11 15:01 EAGLE Version 5.9.0 Copyright (c) 1988-2010 CadSoft Part Value Device Package Library Sheet C1 100uF CAP_POLPTH1 CPOL-RADIAL-100UF-25V SparkFun 1 C2 10uF CAP_POLPTH2 CPOL-RADIAL-10UF-25V SparkFun 1 C3 .1uF CAPPTH2 CAP-PTH-SMALL2 SparkFun 1 C4 .1uF CAPPTH2 CAP-PTH-SMALL2 SparkFun 1 C5 10uF CAP_POLPTH2 CPOL-RADIAL-10UF-25V SparkFun 1 C6 1uF CAPPTH2 CAP-PTH-SMALL2 SparkFun 1 C8 .22uF CAP_POLPTH2 CPOL-RADIAL-10UF-25V SparkFun 1 C9 1nF CAPPTH2 CAP-PTH-SMALL2 SparkFun 1 C11 10uF CAP_POLPTH2 CPOL-RADIAL-10UF-25V SparkFun 1 J1 POWER_JACKPTH_LOCK POWER_JACKPTH_LOCK POWER_JACK_PTH_LOCK SparkFun 1 JP3 M03PTH 1X03 SparkFun 1 JP9 M03SCREW_LOCK SCREWTERMINAL-3.5MM-3_LOCK.007S SparkFun 1 LED1 Green LED5MM LED5MM SparkFun 1 R1 1k RESISTORPTH1 AXIAL-0.3 SparkFun 1 R4 330 RESISTORPTH1 AXIAL-0.3 SparkFun 1 R5 1M RESISTORPTH1 AXIAL-0.3 SparkFun 1 R6 10k RESISTORPTH1 AXIAL-0.3 SparkFun 1 R7 1k RESISTORPTH1 AXIAL-0.3 SparkFun 1 R8 R8 RESISTORPTH1 AXIAL-0.3 SparkFun 1 R9 R9 RESISTORPTH1 AXIAL-0.3 SparkFun 1 R10 5.6k RESISTORPTH1 AXIAL-0.3 SparkFun 1 R11 5.6k RESISTORPTH1 AXIAL-0.3 SparkFun 1 R12 50k POT-RV16AF-20 POT_ALPHA_RV16AF-20 SparkFun 1 R13 250k POT-RV16AF-20 POT_ALPHA_RV16AF-20 SparkFun 1 R14 25k POT-RV16AF-20 POT_ALPHA_RV16AF-20 SparkFun 1 S1 SWITCH-SPSTPTH_LOCK SWITCH-SPDT_LOCK.007S SparkFun 1 S2 SWITCH-SPSTPTH_LOCK SWITCH-SPDT_LOCK.007S SparkFun 1 S3 SWITCH-SPSTPTH_LOCK SWITCH-SPDT_LOCK.007S SparkFun 1 U1 74HC04 74HC04_HEX_INVERTER DIL14 SparkFun 1 U2 XR2206 XR2206 DIL16 SparkFun 1 VR1 L7812 V_REG_78XXSINK TO220-IGO SparkFun 1 VR2 LM7805 V_REG_78XXSINK TO220-IGO SparkFun 1
Com a comentaris, fixem-nos que hi ha una llibreria que es diu Sparkfun, de manera que en aquesta llibreria trobem tots els components que es fan servir en els kits de Sparkfun. D'altra banda, si miro l'esqumàtic, es veu com es fa, per tal de millorar la llegbilitat de l'esquema, allò de ficar un label en un wire de manera que aquest wire pugui tenir una discontinuïtat (veure l'esquema, per exemple el label FREQ). Això s'ha de fer ficant el mateix NAME a les dos wires que vull unir.
creat per Joan Quintana Compte, maig 2011
