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  • Arduino 16x2 LCD Display and 4x4 Matrix Keypad

    I built this, but the sketch does not compile, there were multiple faults This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.Arduino: 1.0.6 (Windows NT (unknown)), Board: "Arduino Uno"sketch_oct13a.ino:50:12: error: #include expects "FILENAME" or <FILENAME>sketch_oct13a.ino:52:12: error: #include expects "FILENAME" or <FILENAME>sketch_oct13a:105: error: missing terminating ' charactersketch_oct13a:55: error: 'interface' does not name a typesketch_oct13a:86: error: 'Arduino' does not name a typesketch_oct13a:91: error: 'Arduino' does not name a typesketch_oct13a:97: error: 'Keypad' does not name a typesketch_oct13a.ino: In function 'void setup()':sketch_oct13a:105: e...

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    I built this, but the sketch does not compile, there were multiple faults This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.Arduino: 1.0.6 (Windows NT (unknown)), Board: "Arduino Uno"sketch_oct13a.ino:50:12: error: #include expects "FILENAME" or <FILENAME>sketch_oct13a.ino:52:12: error: #include expects "FILENAME" or <FILENAME>sketch_oct13a:105: error: missing terminating ' charactersketch_oct13a:55: error: 'interface' does not name a typesketch_oct13a:86: error: 'Arduino' does not name a typesketch_oct13a:91: error: 'Arduino' does not name a typesketch_oct13a:97: error: 'Keypad' does not name a typesketch_oct13a.ino: In function 'void setup()':sketch_oct13a:105: error: 'the' was not declared in this scopesketch_oct13a:105: error: expected `;' before 'LCD'sketch_oct13a:111: error: 'a' was not declared in this scopesketch_oct13a:111: error: expected `;' before 'message'sketch_oct13a.ino: In function 'void loop()':sketch_oct13a:123: error: 'kpd' was not declared in this scopesketch_oct13a:126: error: 'the' was not declared in this scopesketch_oct13a:126: error: expected `;' before 'cursor'sketch_oct13a:135: error: expected `;' before 'number'sketch_oct13a:141: error: 'lcd' was not declared in this scopesketch_oct13a:144: error: expected `(' before 'a'sketch_oct13a:144: error: 'a' was not declared in this scopesketch_oct13a:144: error: expected `;' before 'valid'sketch_oct13a:171: error: expected primary-expression before '}' tokensketch_oct13a:171: error: expected `;' before '}' tokensketch_oct13a:171: error: expected primary-expression before '}' tokensketch_oct13a:171: error: expected `)' before '}' tokensketch_oct13a:171: error: expected primary-expression before '}' tokensketch_oct13a:171: error: expected `;' before '}' token

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  • voltman commented on Sardau's instructable Build a 30$ laser Scanner1 year ago
    Build a 30$ laser Scanner

    I have a slight issue with the circuit, in that an arduino can only source 40mA max. I have measured several laser diodes, and the lowest current required for lasing by any of them was 60mA. Might I suggest a single transistor switch be used for each laser. I haven't completed my unit yet (still waiting for the 3d printer to arrive). My own idea would simply be to connect a 10k resistor to the arduino output, from there to the base of a 2N3904, collector to 5V (separate 7805 supply), emitter to the positive of the laser, and negative grounded. Once I have it up and running I'll post my findings.

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