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best gprs modems in usa
thats right using 1% resistors but buddy you would need at least 1w rating for that okay so go for a pot and dont forget to add the 100nF cap in parallel to the pot that will avoid anny ripples in Vadj. we have been in this sim300 business since long time and do...
180 v dc motors circuit
but how to control a dc motor which is shunt wound i.e. with following terminals F1F2, A1A2 i currently use a huge dimmer type dc drive to test these dc motor on cnc machines but i have a GE make DC motor with 4 terminals as named above please tell me how to connect it...
gsm power supply
if you use lm7805 u are going to spoil the sim300 module coz its rated for 4.2V max so make a simple powersupply using lm317t and use a 10k adjustable preset for varying the voltage and a 220 ohm resistor between vout and adj pins just add a good 1000uF electrolytic capacitors...
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