From: jl@glen--canyon.com   
      
   On Sat, 14 Feb 2026 06:14:19 GMT, Jan Panteltje    
   wrote:   
      
   >>john larkin wrote:   
   >   
   >For the OP's problem I could just use a PIC 18F14K22,   
   >Use one of its analog input channels and its DAC,   
   >or a simple 8 bit R2R DAC with resistors on its output pins as DAC.   
   >Do a muliply in software / asm   
   >Even done low frequency audio with it!   
   >Singe chip 3 dollies 50 cents solution,   
   >extremely accurate.   
   >DIL package!   
   >Why analog?   
      
   We're building a product line around the Raspberry Pi RP2040 chip.   
   Dual-core ARM with tons of goodies, 75 cents in any quantity.   
      
   A string of dumb   
      
   setport high   
   setport low   
   setport high   
   setport low   
      
   instrucions, in the most obvious c code, executes every 7 ns, making a   
   70 MHz square wave. Unless you overclock, which works fine.   
      
   We use the RP400 as our dev/debug system.   
      
   But learning analog electronics makes sense. AI will kill circuit   
   design last, if ever.   
      
      
      
   John Larkin   
   Highland Tech Glen Canyon Design Center   
   Lunatic Fringe Electronics   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)