And a mechanical two speed drive on the knob? On 18 July 2014 19:40, Vitaliy M wrote: > A knob + range selectors (1, 10, 100, ..) > > Sent from my phone > > > On Jul 18, 2014, at 11:31, David C Brown wrote: > > > > What is the classic frequency generator UI? > > > > > >> On 18 July 2014 19:08, Vitaliy M wrote: > >> > >> I'm assuming your device will have a digital display, for feedback? > >> > >> What's wrong, with the "classic" frequency generator UI? > >> > >> Sent from my phone > >> > >>> On Jul 18, 2014, at 6:17, David C Brown wrote: > >>> > >>> I am building a simple pulse generator using an LTC6903 "synthesiser > >> chip" > >>> and a few TTL chips. The range will be from about 0.1Hz to 68MHz and > the > >>> frequency is set, geometrically, by a 15 bit control word. I will b= e > >>> using a PIC16F87 to control the synthesiser and drive a display. > >>> > >>> My problem is how to set the frequency by hand using the minimum pan= el > >>> hardware. I need control at the finest level, stepping the control > >>> register by one but also need to be able to make large frequency shif= ts > >>> quickly, perhaps stepping the register by 2^10 > >>> > >>> I have studied this for some time and come up with several solutions, > non > >>> of them entirely satisfactory, but I would appreciate, in the first > >>> instance, suggestions which are not influenced by my thinking. > >>> -- > >>> __________________________________________ > >>> David C Brown > >>> 43 Bings Road > >>> Whaley Bridge > >>> High Peak Phone: 01663 733236 > >>> Derbyshire eMail: dcb.home@gmail.com > >>> SK23 7ND web: www.bings-knowle.co.uk/dcb > >>> > >>> -- > >>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > >>> View/change your membership options at > >>> http://mailman.mit.edu/mailman/listinfo/piclist > >> -- > >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > >> View/change your membership options at > >> http://mailman.mit.edu/mailman/listinfo/piclist > >> > > > > > > > > -- > > __________________________________________ > > David C Brown > > 43 Bings Road > > Whaley Bridge > > High Peak Phone: 01663 733236 > > Derbyshire eMail: dcb.home@gmail.com > > SK23 7ND web: www.bings-knowle.co.uk/dcb > > > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .