Legal Removal Request This form is for reporting content posted on the AB Electronics UK forums that you believe violates your personal legal rights or applicable local laws for your country. Post: Hi Zsombor The easiest way to do what you want would be to read the ADC value into a variable using the read_adc_voltage() function and write the variable to the DAC using the set_dac_voltage() function. The code below reads a value from the ADC channel 1 and writes it to the DAC channel 1. [pre][code]#!/usr/bin/env python import time import ExpanderPi def main(): ''' Main program function ''' adc = ExpanderPi.ADC() # create an instance of the ADC dac = ExpanderPi.DAC(2) # create an instance of the DAC with the gain set to 2 so the maximum voltage is 4.095V # set the ADC reference voltage. this should be set to the exact voltage adc.set_adc_refvoltage(4.096) print("Updating DAC from ADC") while True: # read the adc voltage on channel 1 to a variable involt = adc.read_adc_voltage(1, 0) # write the variable to the dac on channel 1 dac.set_dac_voltage(1, involt) time.sleep(0.1) if __name__ == "__main__": main()[/code][/pre] The ADC voltage reference is set to a value of 4.096 which should match the voltage of the reference on the Expander Pi. The DAC is set to use a gain of 2 which gives it a voltage range of 0 to 4.095V. This allows the DAC to have the same voltage range as the ADC so any voltage between 0 and 4.095V on the ADC input will be sent to the DAC output. A variable called involt is used to store the value from the ADC before writing it to the DAC. I hope this helps you with your problem. Select the country where you are claiming legal rights. Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Aruba Australia Austria Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia And Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory British Virgin Islands Brunei Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Canary Islands Cape Verde Cayman Islands Central African Republic Chad Channel Islands Chile Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Cook Islands Costa Rica Croatia Cuba Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic East Timor Ecuador Egypt El Salvador Equatorial Guinea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Federated States of Micronesia Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guyana Haiti Heard Island and McDonald Islands Honduras Hong Kong Hungary Iceland India Indonesia Ireland Israel Italy Jamaica Japan Jordan Kazakhstan Kenya Kiribati Kuwait Kyrgyzstan Laos Latvia Lesotho Liechtenstein Lithuania Luxembourg Macau Macedonia Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia, Federated States Of Moldova, Republic Of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands Netherlands Antilles New Caledonia New Zealand Nicaragua Niue Norfolk Island Northern Mariana Islands Norway Oman Palau Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Puerto Rico Qatar Reunion Romania Russia Rwanda Samoa San Marino Sao Tome and Principe Saudi Arabia Serbia Seychelles Singapore Slovakia Slovenia Solomon Islands South Africa South Georgia and the South Sandwich Islands South Korea Spain Sri Lanka St. Helena St. Kitts and Nevis St. Lucia St. Pierre and Miquelon St. Vincent and the Grenadines Suriname Svalbard and Jan Mayen Islands Swaziland Sweden Switzerland Syria Taiwan Tajikistan Tanzania Thailand Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu U.S. Virgin Islands Uganda Ukraine United Arab Emirates United Kingdom United States United States Minor Outlying Islands Uruguay Uzbekistan Vanuatu Vatican City Venezuela Vietnam Wallis and Futuna Islands Western Sahara Yemen Yugoslavia Zambia What legal issue or problem do you wish to report? Please select Privacy / Erasure under GDPR Defamation Intellectual Property Hate Speech Other Please enter the following information so we can process your report. Contact Name: Contact Email: Details of complaint: Submit Complaint