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| Subject: | Re: LF: 137kHz transmitters |
| From: | Andy Talbot <[email protected]> |
| Date: | Fri, 25 Jun 2010 18:36:47 +0100 |
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A pair of old fashioned 74xx161 devices (inverter needed, too)
Hardwire a preset loaded values of (256 - N), it counts up from that and reloads the preset value when the count rolls over from 255 to 0
On 25 June 2010 18:29, Roger Lapthorn <[email protected]> wrote: 3560 and 3579kHz, both cheap crystals, divided by 26, give CW and QRSS frequencies on 136/137kHz. What is the simplest and cheapest way of getting divide by 26? |
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