cyw1984

Which chip can playback normal voice? "one" ,"two"...."three"....."nine".."ten" then can use the mircocontroller to control each one playing back Thx

I am used a AD5678 -2 (16 bit

output 0V mean that common pin 3 and short to GOUND???

Thanks~~But I need add on a NEW shockky or not?? What NEW Op amp should I add on this circuit?? and pin 3 of U3 and NEW op amp connect to where??? thanks

o..I SEE Firstly, i should remove all the part of U1 (11.2V),Right?? I wolud like to use another control voltage reference (DAC) instead of the existing one that is used to control the current and voltage. Also...How to re-arrange the inputs of U3 and add an inverting opamp stage. Can you draw it to me??? Thanks a lot

hello all I want to know the voltag range of

THX~~~But it ;s don't work~~~ someone can help??

Thanks a lot~~ I need pots to adjust the output voltage because it is use for V reference ..... My AD669 DAC Vref is given by this +-10V

+/-15V power supply using LM317 and LM337 regulator ICs How to designa +/-15V power supply using LM317 and LM337 regulator ICs. Thx The voltage is used to DAC (AD669) I have try to design the circuit.... Is it Right?? [img width=680 height=453]

About Visual Basic6 and RS232 ASCII communication If I want to send the value (ASCII) to 8051 series port VB block input: 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18 . . . . . . . 29.93 29.94 29.95 29.96 29.97 29.98 29.99 30.00 RS232 transmit : 0000 0001 0002 0003 0004 0005 0006 . . . 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 If i want display 0-30 with 0.00 (ACSII)..... How can I write the VB software , It need to write 3000 structure????

D to A covertor reference Any High Precision +-10 V Reference?? AD688 is too expensive...any other cheaper??

Vin=40V I used the power supply to represent DAC

I am sorry..i have try this circuit...but i don't know it 's not work.. the output is not linear and the output is disorder how to shoot it?

why i can't open the sc,lbr and borad in other PC??

I want to common the Opamp VCC and GND to the Vin and GND how to do that- -sorry fot my poor english

thanks again I get a problem here... If my Vin 30 or 32V..can the output achieve 30V??? how to change the circuit...because I want to common the VCC and GND to supply voltage.... And what values of filter is suitable??? thanks

audioguru old man, I have tied your circuit....It has some problem...... It use 15K resistor series as DAC input.... The Vref is not between 0-10V.voltage drop on the resistor Also....the output is exactly the same of Vin What is the cause??? I used the LM358 to test (Vin 36V and Gnd it)

Thank you for your help.... Can the cirucit deliver 30V at 2A?? On the other hand, I would like to use LM358 for testing, Is it OK?? any op-amp is prefectly on this cirucit?? As I know CA3140 is 4.5MHz, BiMOS Operational Amplifier with MOSFET

I want the output current to be around 2 to 3 AMPS.....Your 's enclose can the output achieve to 0-30V??? Also Use a higher voltage IC ................which IC should be suitable on it?? And which you used??

It is 12BIT DAC 0-10V also........It about 0-2V but....current limit I will design later

Thanks a lot...But I have few question about this.... 1. DC sypply voltage only 36V, Is ir really suitable??? 2. How to caculate the resistor values (10K) between PNP Base and Emitter and NPN base to output(10K and 100K)??? 3. What is the values of capacitor should I use?? 4.I know it haven't current limiting....I just for testing . did you added current limiting on it?? Thanks a lot...Sorry for my trouble and poor english