实验用的数字电位器电路,The experimenter&#
实验用的数字电位器电路,the experimenter's pot - digital potentiometer
introduction
the experimenter's pot is a solid state potentiometer using dallas semiconductor’s ds1869 and national’s lm78l05 two electrolytic capacitor two small push button switch and two optional molex connector. this project is very useful especially in finding the right value of resistor in your experiments, you can attach this circuit to your next project that uses a pot or trimmer cause there are three types of ds1869 these are:
- ds1869-10 which is 10k
- ds1869-50 a 50k version
- ds1869-100 the 100k version
schematic
description
as you can see, the circuit is powered from a 9v power supply (actually any 9v power source will work, as long as the current rating is not less than 25ma) stepped down to 5v by the lm78l05 ic and two filter capacitor one for the input and one for the output, the wiper arm’s position is stepped by pressing sw2 for adding the resistance of wiper arm to high terminal and sw1 for decreasing just like an ordinary mechanical potentiometer adding the resistance to high terminal decreases the resistance to low terminal.
parts list
parts list:
c1 10uf/16v electrolytic capacitor
c2 0.01uf/50v ceramic capacitor
u1 lm78l05
u2 ds1869 (see notes)
sw1,sw2 small push button switch
notes:
the maximum wiper current allowed through the ds1869 is only 1 milliamps. there are three types of ds1869
ds1869-10 use this chip if you want to make a 10k version
ds1869-50 for a 50k version pot.
ds1869-100 for the 100k version
pcb
pcb
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introduction
the experimenter's pot is a solid state potentiometer using dallas semiconductor’s ds1869 and national’s lm78l05 two electrolytic capacitor two small push button switch and two optional molex connector. this project is very useful especially in finding the right value of resistor in your experiments, you can attach this circuit to your next project that uses a pot or trimmer cause there are three types of ds1869 these are:
- ds1869-10 which is 10k
- ds1869-50 a 50k version
- ds1869-100 the 100k version
schematic
description
as you can see, the circuit is powered from a 9v power supply (actually any 9v power source will work, as long as the current rating is not less than 25ma) stepped down to 5v by the lm78l05 ic and two filter capacitor one for the input and one for the output, the wiper arm’s position is stepped by pressing sw2 for adding the resistance of wiper arm to high terminal and sw1 for decreasing just like an ordinary mechanical potentiometer adding the resistance to high terminal decreases the resistance to low terminal.
parts list
parts list:
c1 10uf/16v electrolytic capacitor
c2 0.01uf/50v ceramic capacitor
u1 lm78l05
u2 ds1869 (see notes)
sw1,sw2 small push button switch
notes:
the maximum wiper current allowed through the ds1869 is only 1 milliamps. there are three types of ds1869
ds1869-10 use this chip if you want to make a 10k version
ds1869-50 for a 50k version pot.
ds1869-100 for the 100k version
pcb
pcb
一文了解有载调压变压器和一般的变压器有什么区别
汽车电子控制系统单元设计方案
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一种神经语音克隆系统两种方法在自然性和相似性方面表现良好
开关电源PCB设计要点分析
实验用的数字电位器电路,The experimenter&#
旨在共同探讨中国人工智能的未来
Atmel智能电表解决方案
变频调速电机的技术特点
电话回访对于呼叫中心很重要
三星S8国行推迟到5月底上市？起售价6288元,你愿意买单吗？
华为分布式光伏助力山东乃至全国早日实现双碳目标
常用RF元器件—电容
iPhone8最新消息汇总：iPhone8“爆炸事件”疑是人为，公布照片露出破绽
展会回顾 | 成都视觉系统设计研讨会虹科精彩表现
解决方案下载/从电芯到电池包，全在ITS5300电池充放电测试系统
租赁市场调整期，长租公寓调整经营策略稳定市场
蔚来汽车首次IPO定价为6.25美元 位于价格区间低端
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