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- 300il W RES. D3 = 6.8V ZENEH (1N754) G4 = £N41;rö

Fig. 17, Auto battery adaptor;

- 300il W RES. D3 = 6.8V ZENEH (1N754) G4 = £N41;rö

Fig. 17, Auto battery adaptor;

The dimensions of the enclosure are 4" high, 9" wide and 9" long, with a net weight of 5 pounds. While there may be manufactured frequency counters on the market \yith better appearance, better readout systems, higher count ability and oven controlled crystals, their cost puts them out of reach of the serious experimenter. This unit shows what can be done, without a large engineering effort, to utilize readily available ICs in a project of this magnitude.

A complete set of etched and drilled boards are available from the author for $22.50 plus 50 cents postage in the U.S.

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